[1] E Thimsen, B Sadtler, M Y Berezin. Shortwave-infrared (SWIR) emitters for biological imaging: A review of challenges and opportunities. Nanophotonics, 6, 1043-1054(2017).
[2] Y Zou, S Chakravarty, C J Chung, et al. Mid-infrared silicon photonic waveguides and devices [Invited]. Photonics Research, 6, 254-276(2018).
[3] H Lin, Z Luo, T Gu, . et al. Mid-infrared integrated photonics on silicon: A perspective. Nanophotonics, 7, 393-420(2017).
[4] R Guo, H Gao, Z Cheng, et al. Progress in mid-infrared germanium integrated optoelectronics. Chinese Journal of Lasers, 48, 1901002(2021).
[5] H Ma, H Yang, B Tang, et al. Passive devices at 2 µm wavelength on 200 mm CMOS-compatible silicon photonics platform [Invited]. Chinese Optics Letters, 19, 071301(2021).
[6] A Schliesser, N Picqué, T W Hänsch. Mid-infrared frequency combs. Nature Photonics, 6, 440-449(2012).
[7] M Zhang, H Zhao, N Li. Analysis of the influence of hyperspectral spectral resolution on the mineral recognition. Infrared and Laser Engineering, 35, 493-498(2006).
[8] R H Wilson, K P Nadeau, F B Jaworski, et al. Review of short-wave infrared spectroscopy and imaging methods for biological tissue characterization. Journal of Biomedical Optics, 20, 030901(2015).
[9] T Hu, B Dong, X Luo, et al. Silicon photonic platforms for mid-infrared applications [Invited]. Photonics Research, 5, 05000417(2017).
[10] G Wysocki, A A Kosterev, F K Tittel. Influence of molecular relaxation dynamics on quartz-enhanced photoacoustic detection of CO2 at
[11] T F Refaat, U N Singh, J Yu, et al. Evaluation of an airborne triple-pulsed 2 μm IPDA lidar for simultaneous and independent atmospheric water vapor and carbon dioxide measurements. Applied Optics, 54, 1387-1398(2015).
[12] J Wu, G Yue, W Chen, . et al. On-chip optical gas sensors based on group-IV materials. ACS Photonics, 7, 2923-2940(2020).
[13] Y Cai, X Hu. Short wave infrared imaging technology and its defence application. Infrared and Laser Engineering, 35, 634-637(2006).
[14] Y J Liang, F Liu, Y F Chen, et al. New function of the Yb3+ion as an efficient emitter of persistent luminescence in the short-wave infrared. Light: Science and Applications, 5, e16124(2016).
[15] M Pisani, P Bianco, M Zucco. Hyperspectral imaging for thermal analysis and remote gas sensing in the short wave infrared. Applied Physics B-Lasers and Optics, 108, 231-236(2012).
[16] M M P Arnob, H Nguyen, Z Han, et al. Compressed sensing hyperspectral imaging in the 0.9-2.5 μm shortwave infrared wavelength range using a digital micromirror device and InGaAs linear array detector. Applied Optics, 57, 5019-5024(2018).
[17] Z Liu, Y Chen, Z Li, et al. High-capacity directly modulated optical transmitter for 2-μm spectral region. Journal of Lightwave Technology, 33, 1373-1379(2015).
[18] R Soref. Enabling 2 μm communications. Nature Photonics, 9, 358-359(2015).
[19] G Z Mashanovich, S Stankovic, R Topley, et al. Silicon photonic waveguides and devices for near- and mid-IR applications. IEEE Journal of Selected Topics in Quantum Electronics, 21, 407-418(2015).
[20] Y K Su, Y Zhang, C Y Qiu, et al. Silicon photonic platform for passive waveguide devices: Materials, fabrication, and applications. Advanced Materials Technologies, 5, 1901153(2020).
[21] R Soref. Mid-infrared photonics in silicon and germanium. Nature Photonics, 4, 495-497(2010).
[22] A D Bristow, N Rotenberg, Driel H M van. Two-photon absorption and Kerr coefficients of silicon for 850–2200 nm. Applied Physics Letters, 90, 191104(2007).
[23] W Cao, D Hagan, D J Thomson, et al. High-speed silicon modulators for the 2 μm wavelength band. Optica, 5, 1055-1062(2018).
[24] Leo F, Kuyken B, Hattasan N, et al. Passive SOI devices f the shtwaveinfrared [C]16 th European Conference on Integrated Optics (ECIO), 2012.
[25] R Kitamura, L Pilon, M Jonasz. Optical constants of silica glass from extreme ultraviolet to far infrared at near room temperature. Applied Optics, 46, 8118-8133(2007).
[26] S A Miller, M Yu, X Ji, . et al. Low-loss silicon platform for broadband mid-infrared photonics. Optica, 4, 707-712(2017).
[27] W Chen, J Wu, D Wan, et al. Grating couplers beyond silicon TPA wavelengths based on MPW. Journal of Physics D:Applied Physics, 55, 015109(2021).
[28] J Q Wang, Z Z Cheng, Z F Chen, . et al. Graphene photodetector integrated on silicon nitride waveguide. Journal of Applied Physics, 117, 144504(2015).
[29] T H Xiao, Z Cheng, K Goda. Graphene-on-silicon hybrid plasmonic-photonic integrated circuits. Nanotechnology, 28, 245201(2017).
[30] T Zhou, H Jia, J Ding, et al. On-chip broadband silicon thermo-optic 2×2 four-mode optical switch for optical space and local mode switching. Optics Express, 26, 8375-8384(2018).
[31] Y Vlasov, S McNab. Losses in single-mode silicon-on-insulator strip waveguides and bends. Optics Express, 12, 1622-1631(2004).
[32] Z Cheng, H K Tsang, K Xu, et al. Spectral hole burning in silicon waveguides with a graphene layer on top. Optics Letters, 38, 1930-1932(2013).
[33] Y Zhang, Z Cheng, L Liu, et al. Enhancement of self-phase modulation induced spectral broadening in silicon suspended membrane waveguides. Journal of Optics, 18, 055503(2016).
[34] Z Cheng, K Goda. Design of waveguide-integrated graphene devices for photonic gas sensing. Nanotechnology, 27, 505206(2016).
[35] J Wang, Z Cheng, Z Chen, . et al. High-responsivity graphene-on-silicon slot waveguide photodetectors. Nanoscale, 8, 13206-13211(2016).
[36] J Wang, L Zhang, Y Chen, . et al. Saturable absorption in graphene-on-waveguide devices. Applied Physics Express, 12, 032003(2019).
[37] W Zhou, Z Cheng, X Chen, et al. Subwavelength engineering in silicon photonic devices. IEEE Journal of Selected Topics in Quantum Electronics, 25, 1-13(2019).
[38] W Chen, G Yue, H Hu, et al. Dual-mode GVD tailoring in a convex waveguide. IEEE Photonics Journal, 12, 1-6(2020).
[39] T Sharma, V Rana, J Q Wang, et al. Design of grating based narrow band reflector on SOI waveguide. Optik, 227, 165995(2021).
[40] N Hattasan, B Kuyken, F Leo, et al. High-efficiency SOI fiber-to-chip grating couplers and low-loss waveguides for the short-wave infrared. IEEE Photonics Technology Letters, 24, 1536-1538(2012).
[41] M S Rouifed, C G Littlejohns, G X Tina, et al. Low loss SOI waveguides and MMIs at the MIR wavelength of 2 μm. IEEE Photonics Technology Letters, 28, 2827-2829(2016).
[42] D E Hagan, A P Knights. Mechanisms for optical loss in SOI waveguides for mid-infrared wavelengths around 2μm. Journal of Optics, 19, 025801(2017).
[43] F Li, S D Jackson, C Grillet, et al. Low propagation loss silicon-on-sapphire waveguides for the mid-infrared. Optics Express, 19, 15212-15220(2011).
[44] Z Cheng, X Chen, C Y Wong, et al. Mid-infrared suspended membrane waveguide and ring resonator on silicon-on-insulator. IEEE Photonics Journal, 4, 1510-1519(2012).
[45] W Zhou, Z Cheng, X Wu, . et al. Fully suspended slot waveguides for high refractive index sensitivity. Optics Letters, 42, 1245-1248(2017).
[46] X Chen, K Xu, Z Cheng, et al. Wideband subwavelength gratings for coupling between silicon-on-insulator waveguides and optical fibers. Optics Letters, 37, 3483-3485(2012).
[47] Z Cheng, X Chen, C Y Wong, . et al. Apodized focusing subwavelength grating couplers for suspended membrane waveguides. Applied Physics Letters, 101, 101104(2012).
[48] Z Cheng, X Chen, C Y Wong, et al. Focusing subwavelength grating coupler for mid-infrared suspended membrane waveguide. Optics Letters, 37, 1217-1219(2012).
[49] Z Cheng, X Chen, C Y Wong, et al. Broadband focusing grating couplers for suspended-membrane waveguides. Optics Letters, 37, 5181-5183(2012).
[50] Z Cheng, Z Li, K Xu, . et al. Increase of the grating coupler bandwidth with a graphene overlay. Applied Physics Letters, 104, 111109(2014).
[51] Z Cheng, H K Tsang. Experimental demonstration of polarization-insensitive air-cladding grating couplers for silicon-on-insulator waveguides. Optics Letters, 39, 2206-2209(2014).
[52] W Zhou, Z Cheng, X Sun, et al. Tailorable dual-wavelength-band coupling in a transverse-electric-mode focusing subwavelength grating coupler. Optics Letters, 43, 2985-2988(2018).
[53] Kuyken B, Hattasan N, Vermeulen D, et al. Highly efficient broadb silicononinsulat grating couplers f the sht wave infrared wavelength range [C]Integrated Photonics Research, Silicon Nanophotonics, 2011.
[54] W Zhou, H K Tsang. Dual-wavelength-band subwavelength grating coupler operating in the near infrared and extended shortwave infrared. Optics Letters, 44, 3621-3624(2019).
[55] R Guo, H Gao, T Liu, et al. Ultra-thin mid-infrared silicon grating coupler. Optics Letters, 47, 1226-1229(2022).
[56] J Wang, Z Cheng, C Shu, et al. Optical absorption in graphene-on-silicon nitride microring resonators. IEEE Photonics Technology Letters, 27, 1765-1767(2015).
[57] X Ke, Xinru Wu, Jiun-Yu Sung, et al. Amplitude and phase modulation of UWB monocycle pulses on a silicon photonic chip. IEEE Photonics Technology Letters, 28, 248-251(2016).
[58] J Wang, X Zhang, Z Wei, et al. Design of a dual-mode graphene-on-microring resonator for optical gas sensing. IEEE Access, 9, 56479-56485(2021).
[59] Yujie Hu, Shuxiao Wang, Dawei Wang, et al. Research progress of mid-infrared micro-ring resonator and its application. Laser & Optoelectronics Progress, 57, 230004(2020).
[60] C Y Wong, Z Cheng, X Chen, et al. Characterization of mid-infrared silicon-on-sapphire microring resonators with thermal tuning. IEEE Photonics Journal, 4, 1095-1102(2012).
[61] J Li, Y Liu, Y Meng, et al. 2 μm wavelength grating coupler, bent waveguide, and tunable microring on silicon photonic MPW. IEEE Photonics Technology Letters, 30, 471-474(2018).
[62] Ke Xu, Yimin Chen, Chao Li, et al. An ultracompact OSNR monitor based on an integrated silicon microdisk resonator. IEEE Photonics Journal, 4, 1365-1371(2012).
[63] L Zhang, D Dai. Silicon subwavelength-grating microdisks for optical sensing. IEEE Photonics Technology Letters, 31, 1209-1212(2019).
[64] Z Xing, C Li, Y Han, et al. Waveguide-integrated graphene spatial mode filters for on-chip mode-division multiplexing. Optics Express, 27, 19188-19195(2019).
[65] C Li, D Liu, D Dai. Multimode silicon photonics. Nanophotonics, 8, 227-247(2018).
[66] C Sun, Y Ding, Z Li, . et al. Key multimode silicon photonic devices inspired by geometrical optics. ACS Photonics, 7, 2037-2045(2020).
[67] Y Yu, G Chen, C Sima, . et al. Intra-chip optical interconnection based on polarization division multiplexing photonic integrated circuit. Optics Express, 25, 28330-28336(2017).
[68] E Ryckeboer, A Gassenq, M Muneeb, . et al. Silicon-on-insulator spectrometers with integrated GaInAsSb photodiodes for wide-band spectroscopy from 1510 to 2300 nm. Optics Express, 21, 6101-6108(2013).
[69] Rouifed M S, Littlejohns C G, Tina G X, et al. Silicon photonic devices f the infrared [C]2017 Conference on Lasers ElectroOptics Pacific Rim, 2017: s2264.
[70] M S Rouifed, C G Littlejohns, G X Tina, . et al. Ultra-compact MMI-based beam splitter demultiplexer for the NIR/MIR wavelengths of 1.55 μm and 2 μm. Optics Express, 25, 10893-10900(2017).
[71] S Zheng, M Huang, X Cao, et al. Silicon-based four-mode division multiplexing for chip-scale optical data transmission in the 2 μm waveband. Photonics Research, 7, 1030-1035(2019).
[72] C D Salzberg, J J Villa. Infrared refractive indexes of silicon germanium and modified Selenium glass. Journal of the Optical Society of America, 47, 244-246(1957).
[73] X Liu, B Kuyken, G Roelkens, . et al. Bridging the mid-infrared-to-telecom gap with silicon nanophotonic spectral translation. Nature Photonics, 6, 667-671(2012).
[74] Kuyken B, Verheyen P, Tannouri P, et al. infrared generation by frequency downconversion across 1.2 octaves in a nmallydispersive silicon wire [C]Conference on Lasers ElectroOptics (CLEO), 2013: CTh1 F. 2.
[75] X Liu, R M Osgood, Y A Vlasov, et al. Mid-infrared optical parametric amplifier using silicon nanophotonic waveguides. Nature Photonics, 4, 557-560(2010).
[76] B Kuyken, X Liu, R M Osgood, et al. A silicon-based widely tunable short-wave infrared optical parametric oscillator. Optics Express, 21, 5931-5940(2013).
[77] B Kuyken, X Liu, R M Osgood, et al. Mid-infrared to telecom-band supercontinuum generation in highly nonlinear silicon-on-insulator wire waveguides. Optics Express, 19, 20172-20181(2011).
[78] N Singh, D D Hudson, Y Yu, et al. Midinfrared supercontinuum generation from 2 to 6 μm in a silicon nanowire. Optica, 2, 797-802(2015).
[79] R Kou, T Hatakeyama, J Horng, et al. Mid-IR broadband supercontinuum generation from a suspended silicon waveguide. Optics Letters, 43, 1387-1390(2018).
[80] A G Griffith, R K Lau, J Cardenas, . et al. Silicon-chip mid-infrared frequency comb generation. Nature Communications, 6, 6299(2015).
[81] M Yu, Y Okawachi, A G Griffith, et al. Mode-locked mid-infrared frequency combs in a silicon microresonator. Optica, 3, 854-860(2016).
[82] R Guo, W Chen, H Gao, et al. Is Ge an excellent material for mid-IR Kerr frequency combs around 3 μm wavelengths. Journal of Lightwave Technology, 40, 2097-2103(2022).
[83] Camp M A Van, S Assefa, D M Gill, . et al. Demonstration of electrooptic modulation at 2165 nm using a silicon Mach-Zehnder interferometer. Optics Express, 20, 28009-28016(2012).
[84] X Wang, W Shen, W Li, et al. High-speed silicon photonic Mach–Zehnder modulator at 2 μm. Photonics Research, 9, 535-540(2021).
[85] W Cao, S Liu, C G Littlejohns, et al. High-speed silicon Michelson interferometer modulator and streamlined IMDD PAM-4 transmission of Mach-Zehnder modulators for the 2 μm wavelength band. Optics Express, 29, 14438-14451(2021).
[86] J Wang, Q Li, D Huang, et al. Design of graphene-on-germanium waveguide electro-optic modulators at the 2 μm wavelength. OSA Continuum, 2, 749-758(2019).
[87] G Yue, Z Xing, H Hu, et al. Graphene-based dual-mode modulators. Optics Express, 28, 18456-18471(2020).
[88] H Zou, Y Wang, X Zhang, et al. Optimal design and preparation of silicon-organic hybrid integrated electro-optic modulator. Optics and Precision Engineering, 28, 2138-2150(2020).
[89] C Zhong, H Ma, C Sun, et al. Fast thermo-optical modulators with doped-silicon heaters operating at 2 μm. Optics Express, 29, 23508-23516(2021).
[90] M Nedeljkovic, R Soref, G Z Mashanovich. Free-carrier electrorefraction and electroabsorption modulation predictions for silicon over the 1-14-μm infrared wavelength range. IEEE Photonics Journal, 3, 1171-1180(2011).
[91] Slater B, Johnson M H, Rosenfeld L, et al. Modelling waveguideintegrated superconducting nanowire single photon detects at shtwave infrared [C]2018 IEEE Photonics Society Summer Topical Meeting Series (SUM), 2018: 9394.
[92] R R Grote, B Souhan, N Ophir, et al. Extrinsic photodiodes for integrated mid-infrared silicon photonics. Optica, 1, 264-267(2014).
[93] N Hattasan, A Gassenq, L Cerutti, . et al. Heterogeneous integration of GaInAsSb p-i-n photodiodes on a silicon-on-insulator waveguide circuit. IEEE Photonics Technology Letters, 23, 1760-1762(2011).
[94] Cong H, Xue C L, Zheng J, et al. Silicon based GeSn pin photodetect with longwave cutoff at 2.3 μm [C]2016 IEEE 13th International Conference on Group IV Photonics (GFP), 2016: 106107.
[95] J Zhang, J Lv, Z Ni. Highly sensitive infrared detector based on a two-dimensional heterojunction. Chinese Optics, 14, 87-99(2021).
[96] S Hu, R Tian, Gan X and. Two-dimensional material photodetector for hybrid silicon photonics. Chinese Optics, 14, 1039-1055(2021).
[97] J Guo, J Li, C Liu, et al. High-performance silicon-graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm. Light: Science & Applications, 9, 1-11(2020).
[98] B Souhan, R R Grote, C P Chen, et al. Si+-implanted Si-wire waveguide photodetectors for the mid-infrared. Optics Express, 22, 27415-27424(2014).
[99] J J Ackert, D J Thomson, L Shen, et al. High-speed detection at two micrometres with monolithic silicon photodiodes. Nature Photonics, 9, 393-396(2015).