Top Grating, Surface-Emitting DFB Quantum Cascade Lasers in Continuous-Wave Operation

被引：6
|
作者：
Liu, Yinghui [1 ,2 ]
Zhang, Jinchuan [1 ,2 ]
Jia, Zhiwei [1 ,2 ]
Yao, Danyang [1 ,2 ]
Liu, Fengqi [1 ,2 ]
Zhai, Shenqiang [1 ,2 ]
Zhuo, Ning [1 ,2 ]
Wang, Zhanguo [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100190, Peoples R China
[2] Beijing Key Lab Low Dimens Semicond Mat & Devices, Beijing 100083, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2015年 / 27卷 / 17期
关键词：
Semiconductor lasers; quantum cascade lasers; distributed feedback devices;
D O I：
10.1109/LPT.2015.2443780
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We demonstrate room temperature, continuous-wave operation of top grating based surface-emitting distributed feedback quantum cascade lasers at lambda similar to 4.8 gm. The secondorder metal/semiconductor grating structure allows efficient surface emission for the transverse-magnetic-polarized light. The CW output power from the substrate facet reached 94 mW at 25 degrees C, with a low threshold current density of 1.21 kA/cm(2). Single-mode emission with a side-mode suppression ratio about 30 dB is continuously tunable by the heat sink temperature or injection current. A far-field radiation pattern with a small divergence angle of 0.58 x 16.2 is obtained. Our work may contribute to the fabrication approach for substrateemitting distributed feedback lasers based on a very simple processing.
引用
收藏
页码：1829 / 1832
页数：4
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