UMass Boston

Gang Sun, Professor, Engineering

Gang Sun

Department:
Engineering
Title:
Professor
Location:
McCormack Hall Floor 03
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Biography

After earning his Ph.D. in Electrical Engineering from Johns Hopkins University in 1993, Greg Sun joined the faculty at the University of Massachusetts Boston, where he is currently a professor in the Department of Electrical Engineering. He played a key role in establishing the first publicly supported Engineering Program in the City of Boston, serving as the founding Chair of the Department of Engineering at UMass Boston from 2014 to 2023.

Area of Expertise

Silicon photonics: Silicon based photonic devices and systems, including lasers, LEDs, and IR detectors, waveguides and SiGeSn-based devices

Novel materials and structures: Group-IV, III-V and II-VI systems, quantum wells, quantum dots, optical waveguides

Quantum processes: Carrier scattering and transport, phonon dynamics and engineering, band-to-band and intersubband transitions in semiconductor structures

Semiconductor opto-electronics: Emitters and photodetectors spanning UV to far infrared including conventional lasers and quantum cascade lasers

Nano-photonics: Surface plasmon enhanced optical processes and devices with the use of subwavelength metal structures

Degrees

Ph.D. Electrical Engineering, Johns Hopkins University, Baltimore, Maryland, 1993

M.S. Electrical Engineering, Marquette University, Milwaukee, Wisconsin, 1988

B.S. Microelectronics, Beijing University, Beijing, China, 1984

Professional Publications & Contributions
  • Ghosh, G. Sun, S.-Q. Yu, G.-E. Chang, "Impact of carrier momentum (k)-space separation on GeSn infrared photodetectors," invited paper, IEEE Journal of Selected Topics in Quantum Electronics, 31, 3800211 (2025)
  • -E. Chang, S.-Q. Yu, G. Sun, "GeSn Rule-23 - the Performance Limit of GeSn Infrared Photodiodes," Sensors 23, 7386 (2023)
  • Ghosh, G. Sun, T. A. Morgan, G. T. Forcherio, H. H. Cheng, and G.-E. Chang, "Dark Current Analysis on GeSn p-i-n Photodetectors," Sensors 23, 7531 (2023)
  • Wang, C. Fu, G. Sun, M. A. Gharbi, and C. S Yelleswarapu, "Plasmon enhancement of third-order nonlinear optical absorption of gold nanoparticles dispersed in planar oriented nematic liquid crystals, Nanotechnology 34, 365205 (2023)
  • Sun, R. A. Soref, J. B. Khurgin, S.-Q. Yu and G.-E. Chang, "Longwave IR Lattice Matched L-Valley Ge/GeSiSn Waveguide Quantum Cascade Detector," Optics Express 30, 42385-42393 (2022)
  • Ghosh, R. Bansal, G. Sun, R. A. Soref, H.-H. Cheng, and G.-E. Chang "Design and Optimization of GeSn Waveguide Photodetectors for 2-µm Band Silicon Photonics," Sensors 22, 3978 (2022)
  • Chang, H.-H. Cheng, G. A Sevison , J. R. Hendrickson , Z. Li , I. Agha , J. Mathews , R. A. Soref , and G. Sun "Power-Dependent Investigation of Photo-Response from GeSn-Based p-i-n Photodetector Operating at High Power Density," Materials 15, 989 (2022)
  • Zhou, S. Ojo, C.-W. Wu, Y. Miao, H. Tran, J. M. Grant, G. Abernathy, S. Amoah, J. Bass, O. Olorunsola, G. Salamo, W. Du, G.-E. Chang, J. Liu, J. Margetis, J. Tolle, Y.-H. Zhang, G. Sun, R. Soref, B. Li, S.-Q. Yu, "Electrically injected GeSn lasers with peak wavelength up to 2.7 µm," Photonics Research 10,222-229 (2022)
  • -E. Chang, S.-Q. Yu, J. Liu, H. H. Cheng, R. A. Soref, and G. Sun, "Achievable performance of uncooled homojunction GeSn mid-infrared photodetectors", IEEE Selected Topics in Quantum Electronics 28, 1-11 (2021)
  • -Y. Chang, R. Bansal, K.-C. Lee, G. Sun, R. Soref, H. H. Cheng, and G.-E. Chang, "Planar GeSn lateral p-i-n resonant-cavity-enhanced photodetectors for short-wave infrared integrated photonics," Optics Letters 46, 3316-3319 (2021)
  • -D. Hsieh, J.-H. Lin, R. A. Soref, G. Sun, H. H. Cheng, and G.-E Chang "Electro-absorption modulation in GeSn alloys for wide-spectrum mid-infrared applications," Communications Materials 2, 40 (2021)
  • Li, Z. Song, Z. Li, G. Sun, C. S. Tan, W. Fan, and Q. J. Wang, "Theoretical design of mid-infrared interband cascade lasers in SiGeSn system," New Journal of Physics 22, 083061 (2020)
  • C. Lee, M.-X. Lin, H. Li, H. Cheng, G. Sun, R. Soref, J. Hendrickson, K.-M. Hung, P. Scajev, and A. Medvids, "Planar GeSn photodiode for high-detectivity photodetection at 1550 nm," Applied Physics Letters 117, 012102 (2020)
  • Zhou, Y. Miao, S. Ojo, H. Tran, G. Abernathy, S. Amoah, J. Margetis, G. Salamo, W. Du, J. Liu, Y.-H. Zhang, J. Tolle, G. Sun, R. A. Soref, B Li, and S.-Q. Yu, "Electrically injected GeSn lasers on Si operating up to 100 K," Optica 7, 924-928 (2020)
  • -H. Tsai, B.-J. Huang, R. A. Soref, G. Sun, H. H. Cheng, and G.-E. Chang, "GeSn resonant-cavity-enhanced photodetectors for efficient photodetection at the 2μm wavelength band," Optics Letters 45, 1463-1466 (2020)
  • -C. Shen, Y.-T. Huang, T. L. Chung, M. L. Tseng, W.-Y. Tsai, G. Sun, and D. P. Tsai, "Giant efficiency of visible second-harmonic light by all-dielectric multiple quantum-well metasurface," Physical Review Applied 12, 064056 (2019)
  • Song, W. Fan, C. S. Tan, Q. Wang, D. Nam, D. H. Zhang, and G. Sun, "Band structure of strained Ge1-xSnx alloy: a full-zone 30-band k·p model," IEEE Journal of Quantum Electronics 56, 7100208 (2019)
  • Tran, T. Pham, J. Margetis, Y. Zhou, W. Dou, P. Grant, S. Al-Kabi, J. Grant, G. Sun, R. Soref, J. Tolle, Y.-H. Zhang, W. Du, B. Li, M. Mortazavi, and S.-Q. Yu, "Si-based GeSn photodetectors towards mid-infrared imaging applications," ACS Photonics, 6, 2807−2815 (2019)
  • Song, W. Fan, C. Tan, Q. Wang, D. Nam, D. Zhang, and G. Sun, "Band structure of Ge1−xSnx alloy: a full-zone 30-band k·p model," New Journal of Physics 21 073037 (2019)
  • Zhou, W. Dou, W. Du, S. Ojo, H. Tran, S. A. Ghetmiri, J. Liu, G. Sun, R. Soref, J. Margetis, J. Tolle, B. Li, Z. Chen, M. Mortazavi, S.-Q. Yu, "Optically pumped GeSn lasers operating at 270 K with broad waveguide structures on Si," ACS Photonics 6, 1434-1441 (2019)
  • -J. Huang, C.-Y. Chang, Y.-D. Hsieh, R. Soref, G. Sun, H. H. Cheng and G.-E. Chang, "Electrically-injected GeSn vertical-cavity surface emitters on silicon-on-insulator platforms," ACS Photonics 6, 1931-1938 (2019)
  • Liu, C. Silien, G. Sun, and B. Corbett, "Low loss photonic nanocavity via dark magnetic dipole resonant mode near metal," Scientific Reports 8, 17054 (2018)
  • -Y. Tsai, T. L. Chung, H.-H. Hsiao, P. C. Wu, J.-W. Chen, R. J. Lin, G. Sun, C.-M. Wang, H. Misawa and D. P. Tsai, "Second harmonic light manipulation with vertical split ring resonators," Advanced Materials 31, 1806479 (2018)
  • Margetis, Y. Zhou, W. Dou, P. Grant, B. Alharthi, W. Du, A. Wadsworth, Q. Guo, H. Tran, S. Ojo, G. Abernathy, A. Mosleh, S. A. Ghetmiri, G. Thompson, J. Liu, G. Sun, R. Soref, J. Tolle, B. Li, M. Mortazavi, and S.-Q. Yu, "All group-IV SiGeSn/GeSn/SiGeSn QW laser on Si operating up to 90 K," Applied Physics Letters 113, 221104 (2018)
  • Dou, Y. Zhou, J. Margetis, S. A. Ghetmiri, S. Al-Kabi, W. Du, J. Liu, G. Sun, R. A. Soref, J. Tolle, B. Li, M. Mortazavi, and S.-Q. Yu, "Optically pumped lasing at 3 µm from compositionally graded GeSn with Sn up to 22.3%," Optics Letters 43, 4558-4561 (2018)
  • L. Tseng, H.-H. Hsiao, C. H. Chu, M. K. Chen, G. Sun, A.-Q. Liu and D. P. Tsai, "Metalenses: advances and applications," invited review article, Advanced Optical Materials 6, 1800554 (2018)
  • Grant, J. Margetis, W. Du, Y. Zhou, W. Dou, G. Abernathy, A. Kuchuk, B. Li, J. Tolle, J. Liu, G. Sun, R. Soref, M. Mortazavi, and S.-Q. Yu, "Study of direct bandgap type-I GeSn/GeSn double quantum well with improved carrier confinement," Nanotechnology 29, 465201 (2018)
  • Kawata, G. Sun, D. P. Tsai, and A. Zayats, "The Special Issue on Recent Developments and Applications of Plasmonics," Editorial, ACS Photonics 5, 2538–2540 (2018)
  • T. Hsieh, P. C. Wu, J. B. Khurgin, D. P. Tsai, N. Liu, and G. Sun, "Comparative analysis of metals and alternative infrared plasmonic materials," Perspective, ACS Photonics 5, 2541–2548 (2018)
  • Tran, T. Pham, W. Du, Y. Zhang, P. C. Grant, J. Grant, G. Sun, R. A. Soref, J. Margetis, J. Tolle, B. Li, M. Mortazavi, and S.-Q. Yu, "High performance Ge0.89Sn0.11 photodiode for low-cost shortwave infrared imaging," Journal of Applied Physics, 124, 013101 (2018)
  • -C. Su, C. H. Chu, G. Sun, and D. P. Tsai, "Advances in optical metasurface: fabrication and applications," invited review article, Optics Express 26, 13148-13182 (2018) highlighted as Editor's Pick
  • Grant, J. Margetis, Y. Zhou, W. Dou, G. Abernathy, A. Kuchuk, W. Du, B. Li, J. Tolle, J. Liu, G. Sun, R. A. Soref, M. Mortazavi, and S.-Q. Yu, "Direct bandgap type-I GeSn/GeSn quantum well on a GeSn- and Ge-buffered Si substrate," AIP Advances, 8, 025104 (2018)
  • Margetis, S. Al-Kabi, W. Du, W. Dou, Y. Zhou, T. Pham, P. Grant, S. Ghetmiri, A. Mosleh, B. Li, J. Liu, G. Sun, R. Soref, J. Tolle, M. Mortazavi, S.-Q. Yu, "Si-based GeSn lasers with wavelength coverage of 2–3 μm and operating temperatures up to 180 K," ACS Photonics 5, 827–833 (2018)
  • B. Khurgin, W.-Y. Tsai, D. P. Tsai, and G. Sun, "Landau damping and limit to field confinement and enhancement in plasmonic dimers," ACS Photonics 4, 2871–2880 (2017)
  • Tserkezis, W. Yan, W. Hsieh, G. Sun, J. B. Khurgin, M. Wubs, N. A. Mortensen, "On the origin of nonlocal damping in plasmonic monomers and dimers" International Journal of Modern Physics B31, 1740005 (2017)
  • Chang, T.-W. Chang, H. Li, H.-H. Cheng, R. A. Soref, G. Sun, and J. R. Hendrickson, "Room-temperature 2-μm GeSn P-I-N homojunction light-emitting diode for in-plane coupling to group-IV waveguides," Applied Physics Letters 111, 141105 (2017)
  • Du, S. Ghetmiri, J. Margetis, S. Al-Kabi, Y. Zhou, J. Liu, G. Sun, R. A. Soref, J. Tolle, B. Li, M. Mortazavi, and S.-Q. Yu, "Investigation of Optical Transitions in a SiGeSn/GeSn/SiGeSn Single Quantum Well Structure," Journal of Applied Physics 122, 123102 (2017)
  • Zhou, J. C. Zhang, F. J. Wang, Y. H. Liu, S. Q. Zhai, Y. Zhao, D. B. Wang, Z. W. Jia, Y. H. Zhou, L. J. Wang, J. Q. Liu, S. M. Liu, F. Liu, Z. Wang, J. B. Khurgin, and G. Sun, "Room Temperature Continuous Wave Quantum Dot Cascade Laser Emitting at 7.1 μm," Optics Express 25, 13807-13815 (2017)
  • Seo, J. Lee, M. S. Kim, D. Lee, H. Shin, T. An, G. Sun, J. Kim, and J. Kim, "Plasmon-enhanced phosphorescence of hybrid thin films of metal-free purely organic phosphor and silver nanoparticles", Chemical Physics Letter 676, 134-139 (2017)
  • C. Wu, W.-Y. Tsai, W. T. Chen, Y.-W. Huang, T.-Y. Chen, J.-W. Chen, C. Y. Liao, G. Sun, and D. P. Tsai, "Versatile polarization generation with aluminum plasmonic metasurface," Nano Letters17, 445-452 (2017)
  • A. Ghetmiri, Y. Zhou, J. Margetis, S. Al-Kabi, W. Dou, A. Mosleh, W. Du, A. Kuchuk, J. Liu, G. Sun, R. A. Soref, J. Tolle, H. A. Naseem, B. Li, M. Mortazavi, and S.-Q. Yu, "Study of SiGeSn/GeSn/SiGeSn structure towards direct bandgap type-I quantum well for all group-IV-optoelectronics," Optics Letters 42, 387-390 (2017)
  • Chang, H. Li, C. Ku, S. Yang, H. H. Cheng, J. Hendrickson, R. A. Soref, and G. Sun, "Ge 0.975Sn0.025 320 x 256 imager chip for 1.6 to 1.9 micron infrared vision" Applied Optics 55, 10170-10173 (2016)
  • Al-Kabi, S. A. Ghetmiri, J. Margetis, T. Pham, Y. Zhou, B. Collier, R. Quinde, W. Du, A. Mosleh, J. Liu, G. Sun, R. A. Soref, J. Tolle, B. Li, M. Mortazavi, H. A. Naseem, and S.-Q. Yu, "An optically pumped 2.5 µm GeSn laser on Si operating at 110 K," Applied Physics Letters 109, 171105 (2016)
  • Al-Kabi, S. A. Ghetmiri, J. Margetis, W. Du, A. Mosleh, W. Dou, G. Sun, R. A. Soref, J. Tolle, B. Li, M. Mortazavi, H. A. Naseem, and S.-Q. Yu, "Study of high quality GeSn alloys grown by chemical vapor deposition towards mid-infrared applications," Journal of Electronic Materials 45, 6251–6257 (2016)
  • H. Chu, M. Lun Tseng, J. Chen, T.-Y. Chen, Y.-H. Chen, W. T. Hsieh, H. J. Wu, M. Huang, G. Sun, and D. P. Tsai, "Active dielectric metasurface based on phase change medium," Laser & Photonics Reviews 10, 986–994(2016)
  • Sun, T.-J. Yen, J.-W. Liaw, and D. P. Tsai, "Introduction to the Feature Issue on Nanophotonics," Optics Express 24, 20059-20061 (2016)
  • Zhou, W. Dou, W. Du, T. Pham, S. A. Ghetmiri, S. Al-Kabi, A. Mosleh, M. Alher, J. Margetis, J. Tolle, G. Sun, R. A. Soref, B. Li, M. Mortazavi, H. Naseem, and S.-Q. Yu, "Systematic study of GeSn heterostructure-based light-emitting diodes towards mid-infrared applications," Journal of Applied Physics 120, 023102 (2016)
  • Li, C. Chang, H. H. Cheng, G. Sun, and R. A. Soref, "Disorder-induced enhancement of indirect absorption in a GeSn Photodetector Grown by molecular beam epitaxy," Applied Physics Letters 108, 191111 (2016)
  • Chang, H. Li, S. H. Huang, H. H. Cheng, G. Sun, and R. A. Soref, "Sn-based Ge/Ge0.975Sn0.025/Ge p-i-n photodetector operated with back-side illumination," Applied Physics Letters 108, 151101 (2016)
  • Al-Kabi, S. A. Ghetmiri, J. Margetis, W. Du, A. Mosleh, M. Alher, W. Dou, G. Sun, R. A. Soref, J. Tolle, B. Li, M. Mortazavi, H. A. Naseem, and S.-Q. Yu, "Optical characterization of Si-based Ge1-xSnx alloys with Sn compositions up to 12%," Journal of Electronic Materials 45, 2133–2141 (2016)
  • Tran, W. Du, S. A. Ghetmiri, A. Mosleh, G. Sun, R. A. Soref, J. Margetis, J. Tolle, B. Li, H. A. Naseem, and S.-Q. Yu, "Systematic study of Ge1−xSnxabsorption coefficient and refractive index for the device applications of Si-based optoelectronics," Journal of Applied Physics 119, 103106 (2016)
  • Pham, W. Du, H. Tran, J. Margetis, J. Tolle, G. Sun, R. A. Soref, H. A. Naseem, B. Li, and S.-Q. Yu, "Systematic study of Si-based GeSn photodiodes with 2.6 µm detector cutoff for short-wave infrared detection," Optics Express 24, 4519-4531 (2016)
  • Mosleh, M. Alher, W. Du, L. C. Cousar, S. A. Ghetmiri, S. Al-Kabi, W. Dou, P. C. Grant, G. Sun, R. A. Soref, B. Li, H. A. Naseem, and S.-Q. Yu, "SiyGe1-x-ySnx films grown on Si using a cold-wall ultra-high-vacuum chemical-vapor-deposition system," Editor’s Pick Journal of Vacuum Science & Technology B 34, 011201 (2016)
  • B. Khurgin, G. Sun, W. T. Chen, W.-Y. Tsai, and D. P. Tsai, "Ultrafast Thermal Nonlinearity," Scientific Reports 5, 17899 (2015)
  • B. Khurgin and G. Sun, "Impact of surface collisions on enhancement and quenching of the luminescence near the metal nanoparticles, "Optics Express 23, 30739-30748 (2015)
  • Chang, H. Li, T. P. Chen, W. K. Tseng, H. H. Cheng, C. T. Ko, C. Y. Hsieh, M. J. Chen, and G. Sun, "The strain dependence of Ge0.917Sn0.083 Raman shift," Thin Solid Films 593, 40–43 (2015)
  • -W. Huang, W. T. Chen, W.-Y. Tsai, P. C. Wu, C.-M. Wang, G. Sun, and D. P. Tsai, "Aluminum plasmonic multicolor meta-hologram," Nano Letters 15, 3122–3127 (2015)
  • Mosleh, M. Alher, W. Du, L. C. Cousar, S. A. Ghetmiri, S. Al-Kabi, W. Dou, B. R. Conley, G. Sun, R. A. Soref, B. Li, H. A. Naseem, S.-Q. Yu, "Direct growth of Ge1-xSnx films on Si using a cold-wall ultra-high-vacuum chemical-vapor-deposition system," invited paper, Frontiers in Materials 2, 1-7 (2015)
  • -L. Hsu, P. C. Wu, J.-W. Chen, T.-Y. Chen, B. H. Cheng, W. T. Chen, Y.-W. Huang, C. Y. Liao, G. Sun, and D. P. Tsai, "Vertical split-ring resonator based anomalous beam steering with high extinction ratio," Scientific Reports 5, 11226 (2015)
  • C. Wu, W.-L. Hsu, W. T. Chen, Y.-W. Huang, C. Y. Liao, A. Q. Liu, N. I. Zheludev, G. Sun, and D. P. Tsai, "Plasmon coupling in vertical split-ring resonator metamolecules," Scientific Reports 5, 9726 (2015)
  • N. Pham, W. Du, B.R. Conley, J. Margetis, G. Sun, R.A. Soref, J. Tolle, B. Li, S.-Q. Yu, "Si-based Ge0.9Sn0.1photodetector with peak responsivity of 2.85 A/W and longwave cutoff at 2.4 μm" Electronics Letters 51, 854 – 856 (2015)
  • R. Conley, J. Margetis, W. Du, H. Tran, A. Mosleh, S. A. Ghetmiri, J. Tolle, G. Sun, R. Soref, B. Li, H. A. Naseem, and S.-Q. Yu, "Si based GeSn photoconductors with a 1.63 A/W peak responsivity and a 2.4 μm long-wavelength cutoff," Applied Physics Letters 105, 221117 (2014)
  • A. Ghetmiri, W. Du, B. R. Conley, A. Mosleh, A. Nazzal, G. Sun, R. A. Soref , J. Margetis, J. Tolle, H. A. Naseem, and S.-Q. Yu, "Shortwave-infrared photoluminescence from Ge1-xSnx thin films on silicon," Journal of Vacuum Science & Technology B 32, 060601 (2014)
  • A. Ghetmiri, W. Du, J. Margetis, A. Mosleh, L. Cousar, B. R. Conley, L. Domulevicz, A. Nazzal, G. Sun, R. A. Soref, J. Tolle, B. Li, H. A. Naseem, and S.-Q. Yu, "Direct-bandgap GeSn grown on Silicon with 2230 nm photoluminescence," Applied Physics Letters 105, 151109 (2014)
  • C. Wu, G. Sun, W. T. Chen, K.-Y. Yang, Y.-W. Huang, Y.-H. Chen, H. L. Huang, W.-L. Hsu, H. P. Chiang, and D. P. Tsai, "Vertical split-ring resonator based nanoplasmonic sensor," Applied Physics Letters 105, 033105 (2014)
  • Du, S. A. Ghetmiri, B. R. Conley, A. Mosleh, A. Nazzal, R. A. Soref, G. Sun, J. Tolle, J. Margetis, H. A. Naseem, and S.-Q. Yu, "Competition of optical transitions between direct and indirect bandgaps in Ge1-xSnx," Applied Physics Letters 105, 051104 (2014)
  • Du, Y. Zhou, S. A. Ghetmiri, A. Mosleh, B. R. Conley, A. Nazzal, R. A. Soref, G. Sun, J. Tolle, J. Margetis, H. A. Naseem, and S.-Q. Yu, "Room-temperature electroluminescence from Ge/Ge1-xSnx/Ge diodes on Si substrates," Applied Physics Letters, 104, 241110 (2014)
  • R. Conley, A. Mosleh, S. A. Ghetmiri, W. Du, R. A. Soref, G. Sun, J. Margetis, J. Tolle, H. A. Naseem, and S.-Q. Yu, "Temperature dependent spectral response and detectivity of GeSn photoconductors on silicon for short wave infrared detection," Optics Express 22, 15639-15652 (2014)
  • B. Khurgin and G. Sun, "SPASER’s, VCSEL’s, and Surface plasmon emitting diodes (SPED’s): their unique features and figures of merit," Nature Photonics 8, 468–473 (2014)
  • T. Chen, K.-Y. Yang, C.-M. Wang, Y.-W. Huang, G. Sun, I.-D. Chiang, C. Y. Liao, W.-L. Hsu, H. T. Lin, S. Sun, L. Zhou, A.-Q. Liu, and D. P. Tsai, "High-efficiency broadband meta-hologram with polarization-controlled dual images," Nano Letters 14, 225–230 (2014)
  • H. Tseng, H. Li, V. Mashanov, Y. J. Yang, H. H. Cheng, G.-E. Chang, R. A. Soref, and G. Sun, "GeSn-based p-i-n photodiodes with strained active layer on a Si wafer," Applied Physics Letters 103, 231907 (2013)
  • B. Khurgin and G. Sun, "Third-order nonlinear plasmonic materials: enhancement and limitations," Physics Review A 88, 053838 (2013)
  • Sun, J. B. Khurgin, and D. P. Tsai, "Spoof plasmon waveguide enabled ultrathin room temperature THz GaN quantum cascade laser - a feasibility study," Optics Express 21, 28056-28061 (2013)
  • B. Khurgin and G. Sun, "Plasmonic enhancement of the third order nonlinear optical phenomena: figures of merit," Optics Express 21, 27460-27480 (2013)
  • -Y, Wu, B.-H. Tsai, J.-Z. Chen, G.-E. Chang, V. I. Mashanov, H. H. Cheng, G. Sun, and R. A. Soref, "Sn-based group-IV structure for resonant tunneling diodes," IEEE Electron Device Letters 34, 951-953 (2013)
  • H. Tseng, K. Y. Wu, H. Li, V. Mashanov, H. H. Cheng, G. Sun, and R. A. Soref, "Mid-infrared electroluminescence from a Ge/Ge0.922Sn0.078/Ge double heterostructure p-i-n diode on a Si substrate," Applied Physics Letters 102,182106 (2013). APL Editor's Picks on Semiconductor Research
  • Sun and S.-Q. Yu, "The SiGeSn Approach towards Si-based Lasers," Solid State Electronics 83, 76-81 (2013)
  • Y. Wu, H. H. Cheng, K. M. Hung, and G. Sun, "Theoretical analysis of n-type Si-based resonant tunneling diodes deposited on either partially or fully relaxed SiGe buffer layers," IEEE Transactions on Electron Devices 60, 1298 - 1301 (2013)
  • B. Khurgin and G. Sun, "The case for using gap plasmon-polaritons in second-order optical nonlinear processes," Optics Express 20, 28717-28723 (2012)
  • C. Wu, W. T. Chen, K.-Y. Yang, C. T. Hsiao, G. Sun, A.-Q. Liu, and D. P. Tsai, "Magnetic plasmon induced transparency in three dimensional metamolecules," Nanophotonics 1, 131-138 (2012)
  • B. Khurgin and G. Sun, "How small can ‘nano’ be in a ‘nanolaser’?" Nanophotonics 1, 3-8 (2012)
  • Sun and J. B. Khurgin, "Origin of giant difference between fluorescence, resonance and non-resonance Raman scattering enhancement by surface plasmons," Physical Review A 85, 063410 (2012)
  • B. Khurgin and G. Sun, "Injection pumped single mode surface plasmon generators: threshold, linewidth, and coherence," Optics Express 20, 15309–15325 (2012)
  • L. Tseng, Y.-W. Huang, M.-K. Hsiao, H. W. Huang, H. M. Chen, Y. L. Chen, C. H. Chu, N.-N. Chu, Y. J. He, C. M. Chang, W. C. Lin, L. C. Kuo, Y. J. Liu , D.-W. Huang, H.-P. Chiang, R.-S. Liu, G. Sun, and D. P. Tsai, "Fast fabrication of Ag nanostructure substrate using the femto-second laser for broadband and tunable plasmonic enhancement," ACS Nano 6, 5190–5197 (2012)
  • E. Chang, H. H. Cheng, G. Sun and R. A. Soref, "Transformation of a two-dimensional to one-dimensional energy profile on a spatially deformed Ge0.51Si0.49/Ge0.82Si0.18 wrinkled heterostructure," Journal of Applied Physics 111, 104321 (2012)
  • A. Soref , G. Sun, and H. H. Cheng, "Franz-Keldysh electro-absorption modulation in germanium-tin alloys," Journal of Applied Physics 111, 123113 (2012)
  • Pan, J. Guo, R. A. Soref, W. Buchwald, and G. Sun, "Guided Plasmon modes of triangular and inverted triangular cross section silver nano-ridges," Journal of Optical Society of America B 29, 950-958 (2012)
  • Sun, J. B. Khurgin, and D. P. Tsai, "Comparative analysis of photoluminescence and Raman enhancement by metal nanoparticles," Optics Letters 37, 1583-1585 (2012)
  • Sun, "Towards Si based electrically injected group-IV lasers," invited paper, Optical and Quantum Electronics 44, 563-573 (2012)
  • Pan, J. Guo, R. A. Soref, W. Buchwald, and G. Sun, "Mode properties of flat-top silver nano-ridge surface Plasmon waveguides," Journal of Optical Society of America B 29, 340-345 (2012)
  • B. Khurgin and G. Sun, "Practicality of compensating the loss in the plasmonic waveguides using semiconductor gain medium," Applied Physics Letters 100, 011105 (2012)
  • B. Khurgin and G. Sun, "Scaling of losses with size and wavelength in nanoplasmonics and metamaterials," Applied Physics Letters 99, 211106 (2011)
  • A. Soref, J. Guo, and G. Sun, "Low-energy MOS depletion modulators in silicon-on-insulator micro-donut resonators coupled to bus waveguides," Optics Express 19, 18122 (2011)
  • Sun, J. B. Khurgin, and A. Bratkovsky "Coupled-mode theory of field enhancement in complex metal nanostructures," Physical Review B 84, 045415 (2011)
  • Sun and J. B. Khurgin, "Optimization of the nanolens consisting of coupled metal nanoparticles: an analytical approach," Applied Physics Letters 98, 153115 (2011)
  • Sun and J. B. Khurgin, "Plasmon enhancement of luminescence by metal nanoparticles" invited paper, IEEE Journal of Selected Topics in Quantum Electronics 17, 110 (2011)
  • Sun and J. B. Khurgin, "Theory of optical emission enhancement by coupled metal nanoparticles: an analytical approach," Applied Physics Letters 98, 113116 (2011)
  • Sun, "The intersubband approach to silicon based lasers –circumventing the indirect bandgap limitation," invited article, Advances in Optics and Photonics 3, 53-87 (2011)
  • Sun and J. B. Khurgin, "Comparative study of field enhancement between isolated and coupled metal nanoparticles: an analytical approach," Applied Physics Letters 97, 263110 (2010)
  • Sun, R. A. Soref, and H. H. Cheng, "Design of a Si-based lattice-matched room-temperature GeSn/GeSiSn multi-quantum-well mid-infrared laser diode," Optics Express 18, 19957-19965 (2010)
  • H. Cheng, W.-P. Huang, V. I. Mashanov, and G. Sun, "Local intermixing on Ge/Si heterostructures at low temperature growth," Journal of Applied Physics 108, 044314 (2010)
  • Sun, R. A. Soref, and H. H. Cheng, "Design of an electrically pumped SiGeSn/GeSn/SiGeSn double-heterostructure mid-infrared laser," Journal of Applied Physics 108, 033107 (2010)
  • M. Hung, J.-Y. Kuo, C. C. Hong, H. H. Cheng, G. Sun, R. A. Soref, "Carrier dynamics of terahertz emission based on strained SiGe/Si single quantum well," Applied Physics Letters 96, 213502 (2010)
  • B. Khurgin and G. Sun, "In search of the elusive lossless metal," Applied Physics Letters 96, 181102 (2010)
  • A. Fedorchenko, H. H. Cheng, G. Sun, and R. A. Soref, "Radiation emission from wrinkled SiGe/SiGe nanostructure," Applied Physics Letters 96, 113104 (2010)
  • Sun, F. Chang, and R. A. Soref, "High efficiency thin-film crystalline Si/Ge tandem solar cell," Optics Express, 18, 3746-3753 (2010)
  • Sun, J. B. Khurgin, and C. C. Yang, "Impact of high-order surface Plasmon modes of metal nanoparticles on enhancement of optical emission," Applied Physics Letters 95, 171103 (2009)
  • B. Khurgin and G. Sun, "Enhancement of optical properties of nanoscaled objects by metal nanoparticles," Journal of Optical Society of America B 26, B83-B95 (2009)
  • B. Khurgin and G. Sun, "Impact of disorder on surface plasmons in two-dimensional arrays of metal nanoparticles," Applied Physics Letters 94, 221111 (2009)
  • B. Khurgin and G. Sun, "Enhancement of light absorption in a quantum well by surface plasmon polariton," Applied Physics Letters 94, 191106 (2009)
  • Sun, J. B. Khurgin, and R. A. Soref, "Practical enhancement of photoluminescence by metal nanoparticles," Applied Physics Letters 94, 101103 (2009)
  • B. Khurgin, G. Sun, and R. A. Soref, "Practical limits of absorption enhancement near metal nanoparticles," Applied Physics Letters 94, 071103 (2009)
  • P. Huang, H. H. Cheng, G. Sun, R.-F. Lou, J. H. Yeh, and T.-M. Shen, "Observation of in-plane strain fluctuation in relaxed SiGe virtual substrate," Thin Solid Films, 517, 281-284 (2008)
  • H. Cheng, K. Y. Wang, W. P. Huang, H. H. Cheng, G. Sun, and R. A. Soref, "Electron tunneling in strained n-type Si1-xGex/Si/Si1-xGex double barrier structure," Applied Physics Letters 93, 123509 (2008)
  • Sun, J. B. Khurgin, and R. A. Soref, "Plasmonic light-emission enhancement with isolated metal nanoparticles and their coupled arrays," Journal of Optical Society of America B 25, 1748-1755 (2008)
  • B. Khurgin, G. Sun, and R. A. Soref, "Electroluminescence efficiency enhancement using metal nanoparticles," Applied Physics Letters 93, p.021120 (2008)
  • P. Huang, H. H. Cheng, G. Sun, R. F. Lou, J. H. Yeh, and T. M. Shen, "The characteristic of strain relaxation on SiGe virtual substrate with thermal annealing," Applied Physics Letters 91, 142102 (2007)
  • Y. Wang, W. P. Huang, H. H. Cheng, G. Sun, R. A. Soref, and Y. W. Suen "Observation of type-I and type-II excitons in strained Si/SiGe quantum-well structures," Applied Physics Letters 91, 072108 (2007)
  • Sun, H. H. Cheng, J. Menendez, J. B. Khurgin, and R. A. Soref, "Strain-free Ge/GeSiSn quantum cascade lasers based on L-valley intersubband transitions," Applied Physics Letters 90, 251105 (2007)
  • B. Khurgin, G. Sun, and R. A. Soref, "Enhancement of luminescence efficiency using surface plasmon polaritons: figures of merit," Journal of Optical Society of America B 24, 1968-1980 (2007)
  • Sun, J. B. Khurgin, and R. A. Soref, "Practicable enhancement of spontaneous emission using surface plasmons," Applied Physics Letters 90, 111107 (2007)
  • Lu and G. Sun, "Design and simulation of a mid-infrared quantum cascade laser based on Ge-Si superlattices," Diffusion and Defect Data Pt.B: Solid State Phenomena, 121-123, 677-680 (2007)
  • S. Huang, T. C. Lu, H. H. Yao, H. C. Kuo, S. C. Wang, G. Sun, C.-W. Lin, L. Chang, R. A. Soref, "GaN/AlGaN active regions for terahertz quantum cascade lasers grown by low-temperature metal vapor deposition," Journal of Crystal Growth 298, 687-690 (2007)
  • Sun, "Design of unipolar intersubband lasers for terahertz emission," invited paper, Journal of Luminescence 119-120, 528-534 (2006)
  • Sun, J. B. Khurgin, and R. A. Soref, "Design of a GaN/AlGaN intersubband Raman laser electrically tunable over the 3~5 μm atmospheric transmission window," Journal of Applied Physics 99, 33103 (2006)
  • Sun, J. B. Khurgin, and R. A. Soref, "Nonlinear all-optical GaN/AlGaN multi-quantum-well devices for 100 Gb/s applications at l = 1.55 mm," Applied Physics Letters 87, 201108-201110 (2005)
  • Sun and R. A. Soref, "Design and simulation of a GaN/AlGaN quantum cascade laser for terahertz emission," Microelectronics Journal 36, 450-452 (2005)
  • Sun, R. A. Soref, and J. B. Khurgin, "A comparative study of InAs quantum dot lasers with barriers of direct and indirect bandgaps," Microelectronics Journal 36, 183-185 (2005)
  • Sun and R. A. Soref, J. B. Khurgin, "Active region design of a terahertz GaN/Al0.15Ga0.85N quantum cascade lasers," Superlattices and Microstructures 37, 107-113 (2005)
  • Sun, R. A. Soref, and J. B. Khurgin, "Design of quantum-dot lasers with an indirect bandgap short-period Superlattice for reducing the linewidth enhancement factor," IEEE Photonics Technology Letters 16, 2203-2205 (2004)
  • Sun, R. A. Soref, and J. B. Khurgin, "Reduced threshold current of a quantum dot laser in short period superlattice of indirect-band gap," Applied Physics Letters 84, 3861-3863 (2004)
  • Sun, J. B. Khurgin, and R. A. Soref, "Improved temperature characteristics in quantum dot lasers with indirect-bandgap barriers," OSA Trends in Optics and Photonics Series, 88, 1494-1496 (2003)
  • Lu and G. Sun, "Analytic solution for in-plane valence subbands of strained SiGe superlattice," Chinese Physics Letters 20, 2226-2228 (2003)
  • Sun and R. A. Soref, "Si-based quantum staircase terahertz lasers," Microelectronics Journal 34, 391–393 (2003)
  • A. Soref and G. Sun, "Terahertz gain in SiGe/Si quantum staircase utilizing the heavy-hole inverted effective mass," Applied Physics Letters 79, 3639-3641 (2001)
  • D’Oleo, G. Alvarez-Lorenzo, and G. Sun, "A new approach to design imprinted polymer gels without using a template," Macromolecules, 34, 4965-4971 (2001)
  • Sun and R. A. Soref, "Phonon–pumped terahertz gain in n-type GaAs/AlGaAs superlattice," Applied Physics Letters 78, 3520-3522 (2001)
  • Sun, R. A. Soref, and J. B. Khurgin, "Phonon-pumped terahertz inter-miniband laser, " IEEE J. Selected Topics in Quantum Electronics 7, 376-380 (2001)
  • Friedman, G. Sun, and R. A. Soref, "SiGe/Si THz laser based on transitions between inverted mass light-hole and heavy-hole subbands," Applied Physics Letters 78, 401-403 (2001)
  • Sun, L. Friedman, and R. A. Soref, "Light-hole to heavy-hole acoustic phonon scattering rate," Physical Review B, 62, 8114-8119 (2000)
  • Friedman, R. A. Soref, G. Sun, and Y. Lu, "Asymmetric strained-symmetrized Ge/Si interminiband laser," IEEE Photonics Technology Letters 10, 1715-1717 (1998)
  • Friedman, R. A. Soref, G. Sun, and Y. Lu, "Theory of the strain-symmetrized Si-based Ge/Si superlattice laser," IEEE J. Selected Topics in Quantum Electronics 4, 1029-1034 (1998)
  • A. Soref, L. Friedman, L. C. Lew Yan Voon, L. R. Ram-Mohan, and G. Sun, "Progress toward silicon-based intersubband lasers," J. Vac. Sci. Technol. B 16(3), 1525-1528 (1998)
  • Sun, Y. Lu, and J. B. Khurgin, "Valence intersubband lasers with inverted light-hole effective mass," Applied Physics Letters 72, 1481-1483 (1998)
  • Sun, Y. Lu, and J. B. Khurgin, "Intersubband laser based on the subband dispersion of inverted mass," the focus issue of Optics Express for Quantum Well Laser Design, 2, 143-150 (1998)
  • Sun, Y. Lu, L. Friedman, and R. A. Soref, "Heavy-hole intersubband scattering by confined optical phonons in a Si/ZnS superlattice," Physical Review B 57, 6550-6560 (1998)
  • Friedman, R. A. Soref, and G. Sun, "Silicon-based interminiband infrared laser," Journal of Applied Physics 83, 3480-3485 (1998)
  • A. Soref, L. Friedman, and G. Sun, "Silicon intersubband lasers," Superlattices and Microstructures 23, 427-439 (1998)
  • Sun, J. B. Khurgin, L. Friedman and R. A. Soref, "Tunable intersubband Raman laser in GaAs/AlGaAs multiple quantum wells," Journal of Optical Society of America B 15, 648-651 (1998)
  • Sun, L. Friedman, and R. A. Soref, "Intersubband lasing in silicon-based quantum well structures," Superlattices and Microstructures 22, 3-7 (1997)
  • Friedman, R. A. Soref, and G. Sun, "Quantum parallel laser: a unipolar superlattice intersubband laser," IEEE Photonics Technology Letters 9, 593-595 (1997)
  • Sun and L. Friedman, "Heavy-hole scattering by confined nonpolar optical phonons in a single Si1-xGe x/Si quantum well," Physical Review B 53, 3966-3974 (1996)
  • Khurgin, G. Sun, L. Friedman, and R. A. Soref, "Comparative analysis of optically-pumped intersubband lasers and intersubband Raman Oscillators," Journal of Applied Physics 78, 7398-7400 (1995)
  • Sun, L. Friedman, and R. A. Soref, "Intersubband lasing lifetimes of SiGe/Si and GaAs/AlGaAs multiple quantum well structures," Applied Physics Letters 66, 3425-3427 (1995)
  • Sun and L. Friedman, "Nonparabolicity corrections to the valence band energy levels of Si/GexSi1-x quantum wells," Superlattices and Microstructures 17, 245-251 (1995)
  • Sun and J, Khurgin, "Optically pumped four-level infrared laser based on intersubband transitions in multiple quantum wells: feasibility study," IEEE Journal of Quantum Electronics QE-29, 1104-1111 (1993)
  • Sun, K. Shahzad, J. Gaines, and J. Khurgin, "Room-temperature photopumped blue lasing in ZnSe/ZnS0.06Se0.94 double heterostructures," Applied Physics Letters 59, 310-311 (1991)

Additional Information

Dr. Sun's research focuses on semiconductor optoelectronics, silicon photonics, and nano-plasmonics. He has published over 150 papers in refereed journals and book chapters, delivered more than 160 invited and contributed conference presentations, and presented over 50 seminars and colloquia. His work has been cited more than 11,450 times, with an H-index of 57 according to Google Scholar (as of December 2024). He is a Fellow of Optica (formerly the Optical Society of America) and the American Physical Society (APS).

In addition to his research, Dr. Sun has held visiting professor positions at National Taiwan University, National Cheng Kung University, and Academia Sinica in Taiwan. He has made significant contributions to numerous international technical conferences and workshops, serving on various technical and advisory committees. He has also served as an associate and guest editor for several academic journals. Currently, he is the Deputy Editor of Journal of Lightwave Technology, a biweekly peer-reviewed journal covering optical guided-wave science, technology, and engineering, published jointly by the Optical Society and the IEEE Photonics Society.