Investigation of Subband Electron Temperatures of Quantum Cascade Lasers Peng, Chen ; Sun, Yuankun ; Zhu, Liguo ; Chen, Tao ; Chen, Gang ; Yu, Anping ; Zhong, Sencheng ; Zhou, Pingwei ; Zhai, Zhaohui ; Li, Zeren Abstract Publication: IEEE Photonics Journal Pub Date: February 2019 DOI: 10.1109/JPHOT.2019.2896081 Bibcode: 2019IPhoJ..1196081P