Mid-infrared broadband superluminescent light emitter arrays.
Mid-infrared broadband superluminescent light emitter arrays.
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DOI：
10.1364/ol.43.005150
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发表时间：
2018-10
期刊：
影响因子：
3.6
通讯作者：
Jialin Sun;Chuncai Hou;Jinchuan Zhang;N. Zhuo;Hong-mei Chen;J. Ning;Zhan-guo Wang;Fengqi Liu;Ziyang Zhang
中科院分区：
文献类型：
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作者：
Jialin Sun;Chuncai Hou;Jinchuan Zhang;N. Zhuo;Hong-mei Chen;J. Ning;Zhan-guo Wang;Fengqi Liu;Ziyang Zhang
中红外（MIR）室温（RT）和连续波（CW）宽带量子级联超辐射发光体（QCSLEs）已经成为生物医学成像、安全检查和气体检测等许多应用的理想宽带光源。由于QCSLE子带间跃迁的自发辐射效率很低，要获得毫瓦级的RT-CW输出功率是相当具有挑战性的。在这项工作中，据我们所知，第一次通过集成表现出2.4 mW的非常高的RT-CW功率的几个单个发射器来实现紧凑的光发射器阵列，这归因于由波导结构提供的足够低的反射率，该波导结构包括具有邻近倾斜条纹和J形波导的短直部分的三个部分，和双声子共振QC活性结构。这一进步无疑是宽带光源应用于MIR光子学的一大步。
Mid-infrared (MIR) room-temperature (RT) and continuous-wave (CW) broadband quantum cascade superluminescent light emitters (QCSLEs) have emerged as ideal broadband light sources for a number of applications of biomedical imaging, security inspection, and gas detection. It is quite challenging to attain a RT-CW output power up to milliwatt level due to the very low efficiency of the spontaneous emission in the intersubband transitions in QCSLEs. In this work, for the first time to the best of our knowledge, a compact light emitter array is realized by integrating several single emitters exhibiting a very high RT-CW power of 2.4 mW, which is attributed to the sufficient low reflectivity provided by the waveguide structure that includes three sections with a short straight part adjacent to a tilted stripe and to a J-shaped waveguide, and the two-phonon resonance QC active structure. This advancement is certainly a big step forward to the applications of broadband light sources towards MIR photonics.