[1] W. Lei, C. Jagadish. Lasers and photodetectors for mid-infrared 2–3 µm applications. J. Appl. Phys., 104, 091101(2008).

[2] L. S. Rothman, I. E. Gordon, A. Barbe, D. C. Benner, P. F. Bernath, M. Birk, V. Boudon, L. R. Brown, A. Campargue, J.-P. Champion, K. Chance, L. H. Coudert, V. Dana, V. M. Devi, S. Fally, J.-M. Flaud, R. R. Gamache, A. Goldman, D. Jacquemart, I. Kleiner, J. Vander Auwera. The HITRAN 2008 molecular spectroscopic database. J. Quant. Spectrosc. Radiat. Transf., 110, 533(2009).

[3] A. Bauer, K. Rößner, T. Lehnhardt, M. Kamp, S. Höfling, L. Worschech, A. Forchel. Mid-infrared semiconductor heterostructure lasers for gas sensing applications. Semicond. Sci. Technol., 26, 014032(2011).

[4] H. A. Gebbie, W. R. Harding, C. Hilsum, A. W. Pryce, V. Roberts. Atmospheric transmission in the 1 to 14 µm region. Proc. R. Soc. A, 206, 87(1951).

[5] Q. Guo, J. Zhang, K. Yang, Y. Zhu, Q. Lu, N. Zhuo, S. Zhai, J. Liu, L. Wang, S. Liu, F. Liu. Monolithically integrated mid-infrared sensor with a millimeter-scale sensing range. Opt. Express, 30, 40657(2022).

[6] B. Schwarz, P. Reininger, D. Ristanić, H. Detz, A. M. Andrews, W. Schrenk, G. Strasser. Monolithically integrated mid-infrared lab-on-a-chip using plasmonics and quantum cascade structures. Nat. Commun., 5, 4085(2014).

[7] D. Ristanic, B. Schwarz, P. Reininger, H. Detz, T. Zederbauer, A. M. Andrews, W. Schrenk, G. Strasser. Monolithically integrated mid-infrared sensor using narrow mode operation and temperature feedback. Appl. Phys. Lett., 106, 041101(2015).

[8] B. Schwarz, P. Reininger, H. Detz, T. Zederbauer, A. M. Andrews, S. Kalchmair, W. Schrenk, O. Baumgartner, H. Kosina, G. Strasser. A bi-functional quantum cascade device for same frequency lasing and detection. Appl. Phys. Lett., 101, 191109(2012).

[9] B. Schwarz, D. Ristanic, P. Reininger, T. Zederbauer, D. MacFarland, H. Detz, A. Andrews, W. Schrenk, G. Strasser. High-performance bi-functional quantum cascade laser and detector. Appl. Phys. Lett., 107, 071104(2015).

[10] B. Schwarz, C. A. Wang, L. Missaggia, T. S. Mansuripur, P. Chevalier, M. K. Connors, D. McNulty, J. Cederberg, G. Strasser, F. Capasso. Watt-level continuous-wave emission from a bifunctional quantum cascade laser/detector. ACS Photonics, 4, 1225(2017).

[11] V. S. Ilchenko, A. A. Savchenkov, A. B. Matsko, L. Maleki. Nonlinear optics and crystalline whispering gallery mode cavities. Phys. Rev. Lett., 92, 043903(2004).

[12] A. Chiasera, Y. Dumeige, P. Féron, M. Ferrari, Y. Jestin, G. Nunzi Conti, S. Pelli, S. Soria, G. C. Righini. Spherical whispering-gallery-mode microresonators. Laser Photon. Rev., 4, 457(2010).

[13] J. Faist, C. Gmachl, M. Striccoli, C. Sirtori, F. Capasso, D. L. Sivco, A. Y. Cho. Quantum cascade disk lasers. Appl. Phys. Lett., 69, 2456(1996).

[14] L. He, S. K. Ozdemir, L. Yang. Whispering gallery microcavity lasers. Laser Photonics Rev., 7, 60(2013).

[15] M. H. Mao, H. C. Chien, J. Z. Hong, C. Y. Cheng. Room-temperature low-threshold current-injection InGaAs quantum-dot microdisk lasers with single-mode emission. Opt. Express, 19, 14145(2011).

[16] I. Aharonovich, A. Woolf, K. J. Russell, T. Zhu, N. Niu, M. J. Kappers, R. A. Oliver, E. L. Hu. Low threshold, room-temperature microdisk lasers in the blue spectral range. Appl. Phys. Lett., 103, 021112(2013).

[17] Q. Guo, J. Zhang, C. Ning, N. Zhuo, S. Zhai, J. Liu, L. Wang, S. Liu, Z. Jia, F. Liu. Continuous-wave operation of microcavity quantum cascade lasers in whispering-gallery mode. ACS Photonics, 9, 1172(2022).

[18] Q. Guo, J. Zhang, R. Yin, N. Zhuo, Q. Lu, S. Zhai, J. Liu, L. Wang, S. Liu, F. Liu. Continuous-wave microcavity quantum cascade lasers in whispering-gallery modes up to 50°C. Opt. Express, 30, 22671(2022).

[19] S. Sprengel, C. Grasse, K. Vizbaras, T. Gruendl, M.-C. Amann. Up to 3 µm light emission on InP substrate using GaInAs/GaAsSb type-II quantum wells. Appl. Phys. Lett., 99, 221109(2011).

[20] A. Vizbaras, E. Dvinelis, M. Greibus, A. Trinkunas, D. Kovalenkovas, I. Šimonytė, K. Vizbaras. High-performance single-spatial mode GaSb type-I laser diodes around 2.1 µm. Proc. SPIE, 8993, 899319(2014).

[21] K. Merghem, R. Teissier, G. Aubin, A. M. Monakhov, A. Ramdane, A. N. Baranov. Passive mode locking of a GaSb-based quantum well diode laser emitting at 2.1 µm. Appl. Phys. Lett., 107, 111109(2015).

[22] I. Vurgaftman, W. W. Bewley, C. L. Canedy, C. S. Kim, M. Kim, J. Ryan Lindle, C. D. Merritt, J. Abell, J. R. Meyer. Mid-IR type-II interband cascade lasers. IEEE J. Sel. Top. Quantum Electron., 17, 1435(2011).

[23] Y. Jiang, L. Li, R. Q. Yang, J. A. Gupta, G. C. Aers, E. Dupont, J.-M. Baribeau, X. Wu, M. B. Johnson. Type-I interband cascade lasers near 3.2 µm. Appl. Phys. Lett., 106, 041117(2015).

[24] C. Ning, R. Sun, S. Liu, J. C. Zhang, N. Zhuo, J. Liu, L. Wang, S. Zhai, F. Liu, Z. G. Wang. GaSb surface grating distributed feedback interband cascade laser emitting at 3.25 µm. Opt. Express, 30, 29007(2022).

[25] D. Wang, J. Zhang, C. Hou, Y. Zhao, F. Cheng, X. Jia, S. Zhai, N. Zhuo, J. Liu, F. Liu, Z. Wang. High-performance continuous-wave InP-based 2.1 µm superluminescent diode with InGaAsSb quantum well and cavity structure suppression. Appl. Phys. Lett., 113, 161107(2018).

[26] S. Luo, H. M. Ji, F. Gao, F. Xu, X. G. Yang, P. Liang, T. Yang. High performance 2150 nm-emitting InAs/InGaAs/InP quantum well lasers grown by metalorganic vapor phase epitaxy. Opt. Express, 23, 8383(2015).

[27] Y. Gu, Y. Zhang, Y. Cao, L. Zhou, X. Chen, H. Li, S. Xi. 2.4 µm InP-based antimony-free triangular quantum well lasers in continuous-wave operation above room temperature. Appl. Phys. Express, 7, 032701(2014).

[28] D. Wang, N. Zhuo, Y. Zhao, F. Cheng, S. Niu, J. Zhang, S. Zhai, L. Wang, S. Liu, F. Liu, Z. Wang. Improved performance of InP-based 2.1 µm InGaAsSb quantum well lasers using Sb as a surfactant. Appl. Phys. Lett., 113, 251101(2018).

[29] Q. J. Wang, C. Yan, N. Yu, J. Unterhinninghofen, J. Wiersig, C. Pflügl, L. Diehl, T. Edamura, M. Yamanishi, H. Kan, F. Capasso. Whispering-gallery mode resonators for highly unidirectional laser action. Proc. Natl. Acad. Sci. U.S.A., 107, 22407(2010).