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  1. Y. Zhou, S. Ojo, C. W. Wu, Y. Miao, H. Tran, J. Grant, G. Abernathy, S.r Amoah, J. Bass, G. Salamo, W. Du, G. E. Chang, J. Liu, J. Margetis, J. Tolle, Y. H. Zhang, G. Sun, R. Soref, B. Li, and S. Q. Yu*, Electrically injected GeSn lasers with peak wavelength up to 2.7 µm, Photonics Research 10(1), 222 (2022).[doi.org/10.1364/PRJ.443144]

     

  2. C. T. Yeh,  D. Barshilia, C. J.  Hsieh, H. Y. Li, W. H. Hsieh, and G. E. Chang*, Rapid and Highly Sensitive Detection of C‑reaction Protein Using Robust Self-Compensated Guided-Mode Resonance BioSensing System for Point-of-Care Application, Biosensors 11, 523 (2021).[doi.org/10.3390/bios11120523]

     

  3. Z. Yuan, X. Cheng, T. Li, Y. Zhou, Y. Zhang, X. Gong, G. E. Chang, M. D. Birowosuto, C. Dang, and Y. C. Chen*, Light-Harvesting in Biophotonic Optofluidic Microcavities via Whispering-Gallery Modes, ACS Applied Materials & Interfaces 13, 36909-36918 (2021).[doi.org/10.1021/acsami.1c09845]

     

  4. K. C. Lin, P. R. Huang, H. Li, H. H. Cheng, and G. E. Chang*, Temperature-dependent characteristics of GeSn/Ge multiple-quantum-well photoconductors on silicon, Optics Letters 46(15), 3604-3607 (2021).[doi.org/10.1364/OL.432116]

     

  5. C. 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(13), 3316-3319 (2021).[doi.org/10.1364/OL.427529]


     

  6. C. Wang, C. Gong, Y. Zhang, Z. Qiao, Z. Yuan, Y. Gong, G. E. Chang, W. C. Tu,* and Y. C. Chen*, Programmable rainbow-colored optofluidic fiber laser encoded with topologically structured chiral droplets, ACS Nano 15(7), 11126–11136 (2021).[doi.org/10.1021/acsnano.1c02650]


     

  7. S. An, Y. C. Tai, K. C. Lee, H. H. Cheng, G. E. Chang*, and M. Kim*, Raman scattering study of GeSn under <1 0 0> and <1 1 0> uniaxial stress, Nanotechnology 32(35), 355704(2021). [DOI: 10.1088/1361-6528/ac03d7]

     

  8. S. An, S. Wu, K. H. Lee, C. S. Tan, Y. C. Tai, G. E. Chang, and M. Kim*, High-Sensitivity and Mechanically Compliant Flexible Ge Photodetectors with a vertical p−i−n Configuration, ACS Applied Electronics Materials 3,1780-1786 (2021). (Featured as supplementary cover)[doi.org/10.1021/acsaelm.1c00054​]

     

  9. Y. D. Hsieh, J. H. Lin, R. Soref, G. Sun, H. H. Cheng, and G. E. Chang*, Electro-absorption modulation in GeSn alloys for wide-spectrum mid-infrared silicon photonics, Communications Materials 2, 40 (2021). [doi.org/10.1038/s43246-021-00144-z​]

     

  10. G. E. Chang, S. Q. Yu, J. Liu, H. H. Cheng, R. Soref, G. Sun*, Achievable Performance of Uncooled Homojunction GeSn Mid-infrared Photodetectors, IEEE Journal of Selected Topics on Quantum Electronics, 28(2) 3800611 (2022).[DOI: 10.1109/JSTQE.2021.3065204]


     

  11. S. Ghosh, H. Kumar, B. Mukhopadhyay, and G. E. Chang*, Design and Modeling of High-Performance DBR-Based Resonant-Cavity-Enhanced GeSn Photodetector for Fiber-Optic Telecommunication Networks, IEEE Sensors Journal 12(8), 9900-9908 (2021).
         [DOI:  10.1109/JSEN.2021.3054475]

     

  12. C. H. Tsai, K. C. Lin, C. Y. Cheng, K. C. Lee, H. H. Cheng, and G. E. Chang*, GeSn lateral p-i-n waveguide photodetectors for mid-infrared integrated photonics, Optics Letters 46, 864-867 (2021). 
    DOI: 10.1364/OL.414580]


     

  13. C. Y. Cheng, C. H. Tsai, P. L. Yeh, S. F. Hung, S. Bao, K. H. Lee, C. S. Tan, and G. E. Chang*, Ge-on-insulator lateral p-i-n waveguide photodetectors for optical communication, Optics Letters 45, 6683-6686 (2020).[DOI: 10.1364/OL.409842]


     

  14. Y. Lv, H. Li, K. C. Lee, G. E. Chang, T. H. Shieh, X. S. Wu, C. R. Chang, H. C. Wu, K. M. Hung, and H. H. Cheng, Amplifying photocurrent of graphene on GeSn film by sandwiching a thin oxide between them, Applied Physics Letters 117, 152106 (2020). [DOI: 10.1063/5.0024798]


     

  15. D. Barshilia, L. K. Chau, and G. E. Chang*, Low-cost planar waveguide-based optofluidic sensor for real-time refractive index sensing, Optics Express 28(19), 27337-27345 (2020).[DOI: 10.1364/OE.400800]


     

  16. X Gong, Z. Qiao, P. Guan, S. Fengm, Z. Yuan, C. Huang, G. E. Chang, and Y. C. Chen*, Hydrogel Microlasers for Versatile Biomolecular Analysis Based on Lasing Microarray, Advanced Photonics Research, 2000041 (2020). [DOI: 10.1002/adpr.202000041]


     

  17. S. Ghosh, K. C. Lin, C. H.Tsai, H. Kumar, Q. Chen, L. Zhang, B. Son, C. S Tan, M. Kim, B. Mukhopadhyay, and G. E. Chang*, Metal-semiconductor-metal GeSn photodetectors on silicon for short-wave infrared applications. Micromachines 11, 795 (2020).[DOI: 10.3390/mi11090795]​


     

  18. S. An. S. Wu, C. S Tan, G. E. Chang, G. Xiao, and M. Kim*, Modulation of light absorption in flexible GeSn metal-semiconductor-metal photodetectors by mechanical bending, Journal of Materials Chemistry C8, 13557-13562 (2020). (featured as a front outside cover image)[DOI: 10.1039/D0TC03016C]

     

  19. Y. C. Tai, P. L. Yeh, S An, H. H Cheng, M. Kim and G. E. Chang*, Strain-free GeSn nanomembranes enabled by transfer-printing techniques for advanced optoelectronic applications, Nanotechnology 31(44), 445301 (2020). [DOI: 10.1088/1361-6528/aba6b1].


     

  20. S. Ghosh, K. C. Lin, C. H. Tsai, K. H. Lee, Q. Chen, B. Son, B. Mukhopadhyay, C. S. Tan, and G. E. Chang*, Resonant-cavity-enhanced responsivity in germanium-on-insulator photodetectors, Optics Express 28(16), 23739-23747 (2020). [DOI:10.1364/OE.398046]


     

  21. D. N. Roxby, H. Rivy, C. Gong, X. Gong, Z. Yuan, G. E. Chang, Y. C. Chen*, Microalgae living sensor for metal ion detection with nanocavity-enhanced  photoelectrochemistry, Biosensors and Bioelectronics, 112420 (2020).[DOI: 10.1016/j.bios.2020.112420]


     

  22. H. Kumar, R. Basu, and G. E. Chang*, , Impact of Temperature and Doping on the Performance of Ge/Ge_(1-x)Sn_x/Ge Heterojunction Phototransistors,IEEE Photonics Journal 12(3), 6801814 (2020). .  DOI: 10.1109/JPHOT.2020.2996808


     

  23. S. Ghosh, B. Mukhopadhyay, and G. E. Chang*, Design and analysis of GeSn-based resonant-cavity-enhanced photodetectors for optical communication applications, IEEE Sensors Journal 20(14), 7801-7809 (2020). [DOI: 10.1109/JSEN.2020.2981416]


     

  24. D. N. Roxby, Z. Yuan, S. Krishnamoorthy, P. Wu, W.-C. Tu, G. E. Chang, R. Lau, and Y. C. Chen*, Enhanced biophotocurrent generation in living photosynthetic optical resonator, Advanced Science 1903707 (2020). [DOI: 10.1002/advs.201903707]


     

  25. Y. Zhang, Z. Yuan, Z. Quao, D. Barshilia, W. Wang, G. E. Chang, and Y. U. Chang*, Tunable microlasers modulated by intracavity spherical confinement with chiral liquid crystal, Advanced Optical Materials 1902184 (2020). [DOI:10.1002/adom.201902184]​


     

  26. C. S. 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 band, Optics Letters 45(6), 1463-1466 (2020). [DOI:10.1364/OL.381960]


     

  27. W. T. Hung, D. Barshilia, R. Basu, H. H. Cheng, and G. E. Chang*, Silicon-based high-responsivity GeSn short-wave infrared heterojunction phototransistors with a floating base, Optics Letters 45(5), 1088-1091 (2020). [DOI: 10.1364/OL.383171]


     

  28. B. J. Huang, C. Y. Chang, Y. D. Hsieh, R. A. 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(8), 1931-1938 (2019). [DOI: 10.1021/acsphotonics.8b01678](Selected as the supplementary cover of ACS Photonics.)


     

  29. A. K. Pandey, R. Basu*, H. Kumar, and G. E. Chang*, Comprehensive Analysis and Optimal Design of Ge/GeSn/Ge p-n-p Infrared Heterojunction Phototransistors, IEEE Journal of the Electron Devices Society 7, 118-126 (2019). [DOI: 10.1109/JEDS.2018.2884253]


     

  30. A. K. Pandey, R. Basu, and G. E. Chang*, Optimized Ge1-xSnx/Ge multiple-quantum-well heterojunction phototransistors for high-performance SWIR photodetection, IEEE Sensors Journal 18(14), 5842 - 5852 (2018). [DOI: 10.1109/JSEN.2018.2842107]


     

  31. B. J. Huang, J. H. Lin, H. H. Cheng, and G. E. Chang*, GeSn resonant-cavity-enhanced photodetectors on silicon-on-insulator platforms, Optics Letters 43(6), 1215-1218 (2018). [DOI: 10.1364/OL.43.001215]


     

  32. I. C. Liu, P.C. Chen, L. K. Chau, and G. E. Chang*, Optofluidic refractive-index sensors employing bent waveguide structures for low-cost, rapid chemical and biomedical sensing, Optics Express 26(1), 273-283 (2018). [DOI:10.1364/OE.26.000273]


     

  33. P. C Chen*, R. H. Zhang, Y. Aue-u-lan and G. E. Chang, Micromachining microchannels on cyclic olefin copolymer (COC) substrates with the Taguchi method, Micromachines 8, 264 (2017). [DOI: 10.3390/mi8090264]


     

  34. Y. C. Lin, W. H. Hsieh, L. K. Chau. and G. E. Chang*, Intensity-detection-based guided-mode-resonance optofluidic biosensing system for rapid, low-cost, label-free detection, Sensors and Actuators B: Chemical 250, 659–666 (2017). [DOI: 10.1016/j.snb.2017.04.187] 


     

  35. Y. H. Huang, G. E. Chang*, H. Li, and H. H. Cheng, Sn-based waveguide p-i-n photodetector with strained GeSn/Ge multiple-quantum-well active layer, Optics Letters 42(9), 1652-1655 (2017). [DOI: 10.1364/OL.42.001652] 


     

  36. G. E. Chang*, S. W. Chen, and H. H. Cheng, Tensile-strained Ge/SiGe quantum-well photodetectors on silicon substrates with extended infrared response, Optics Express 24(16), 17562-17571 (2016).[DOI: 10.1364/OE.24.017562] 


     

  37. G. E. Chang*, R. Basu, B. Mukhopadhyay, and P. K. Basu, Design and modeling of GeSn-based heterojunction phototransistors for communication applications, IEEE Journal of Selected Topics in Quantum Electronics 22(6),1-9 (2016).     [DOI:10.1109/JSTQE.2016.2553447] 



     

  38. 陳世樂、蔡孟勳、張國恩，智動化虛實製造系統控制基礎技術簡介，機械月刊42(3), 16-23 (2016). (Invited).


     

  39. H. Li, T. P. Chen, C. Chang, H. H. Cheng, G. E Chang, and K. M. Hung, Diode-like electrical characteristics of SiGe wrinkled heterostructure operating under both forward and reverse bias, Applied Physics Letters 108, 063106 (2016). [DOI: 10.1063/1.4941759]


     

  40. Y. F. Ku, H. Y. Li, W. H. Hsieh, L. K. Chau, and G. E Chang*, Enhanced sensitivity in injection-molded guided-mode-resonance sensors via low-index cavity layers, Optics Express 23(11), 14850-14859 (2015). This paper was selected by Virtual Journal for Biomedical Optics (VJBO) 10(6), Aug. 4, 2015.  [DOI: 10.1364/OE.23.014850]


     

  41. Y. H. Peng, H. H. Cheng, V. Mashanov, and G. E. Chang*, GeSn p-i-n waveguide photodetectors on silicon substrates, Applied Physics Letters 105(23), 231109 (2014). [DOI: 10.1063/1.4903881]


     

  42. J. Z. Chen, H. Li, H. H. Cheng, and G. E. Chang*, Structural and optical characteristics of Ge1−xSnx/Ge superlattices grown on Ge-buffered Si(001) wafers, Optical Materials Express 4(6), 1178-1185 (2014). [DOI: 10.1364/OME.4.001178]


     

  43. H. 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). [DOI: 10.1063/1.4840135]


     

  44. G. E. Chang*, W. Y. Hsieh, J. Z. Chen, and H. H. Cheng, Quantum-confined photoluminescence from Ge1-xSnx/Ge superlattices on Ge-buffered Si(001) substrates, Optics Letters 38(18), 3485-3487 (2013).  [DOI: 10.1364/OL.38.003485]


     

  45. K. 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(8), 951-953 (2013).   [DOI: 10.1109/LED.2013.2266540]


     

  46. G. E. Chang and H. H. Cheng, Optical gain of germanium infrared lasers on different crystal orientations, Journal of Physics D: Applied Physics 46, 065103 (2013).  [DOI:10.1088/0022-3727/46/6/065103]


     

  47. G. E. Chang, K. Y. Wu, H. H. Cheng*, G. Sun, and R. Soref, Transformation of a two-dimensional to one-dimensional energy profile on a spatially deformed Si0.82Ge0.18/Si0.51Ge0.49 wrinkled heterostructure, Journal of Applied Physics 111, 104321 (2012). [DOI: 10.1063/1.4723001]


     

  48. G. E. Chang* and C. O. Chang, Tensile-strained Ge/SiGeSn quantum wells for polarization-insensitive electro-absorption waveguide modulators, IEEE Journal of Quantum Electronics 48(4), 533 - 541 (2012). [DOI: 10.1109/JQE.2012.2187174]



     

  49. G. E. Chang, C. O. Chang, and H. H. Cheng*, Strain analysis of a wrinkled SiGe bilayer thin film, Journal of Applied Physics 111, 034314 (2012).  [DOI: 10.1063/1.3682769]


     

  50. G. E. Chang, S. W. Chang, and S L Chuang*, Strain-balanced GezSn1-z/SixGeySn1-x-y multiple-quantum-well lasers, IEEE Journal of Quantum Electronics 46(12), 1813-1820 (2010).   [DOI: 10.1109/JQE.2010.2059000]


     

  51. G. E. Chang, C. Y. Lu, S. H. Yang, and S L Chuang*, Optical characteristics of a quantum-dot laser with a metallic waveguide, Optics Letters 35(14), 2373-2375 (2010). [DOI: 10.1364/OL.35.002373]


     

  52. G. E. Chang, S. W. Chang, and S L Chuang*, Theory for n-type doped, tensile-strained Ge-SixGeySn1-x-y quantum-well lasers at telecom wavelength, Optics Express 17(14), 11246-11258 (2009).    [DOI: 10.1364/OE.17.011246]


     

  53. C. O. Chang*, G. E. Chang, C. S. Chou, W. T. C. Chien, and P. C. Chen, In-plane free vibration of a single-crystal silicon ring, International Journal of Solids and Structures 45, 6114-6132 (2008). [DOI:10.1016/j.ijsolstr.2008.07.033]

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