[1] C. Gmachl, F. Capasso, D. L. Sivco, and A. Y. Cho.: Recent Progress in Quantum Cascade Lasers and Applications, Rep. Prog. Phys, 2001, 64:1533-1601.
[2] D. J. Miller, K. Sun, L. Tao, M. A. Khan, and M. A. Zondlo.: Open-path, quantum cascade-laser-based sensor for high-resolution atmospheric ammonia measurements, Atmos. Meas. Tech., 7, 81–93, https://doi.org/10.5194/amt-7-81-2014, 2014.
[3] HP_Asiaflux2019_release_HT.pdf