31 October 2016 Directional emission micro-cavity lasers with different device structures
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Abstract
The micro-cavity lasers support the ultra-low threshold and ultrahigh Q-factor, but several disadvantages impede further development, such as isotropic far-field profile pattern and low optical power output. To overcome the intrinsic problems, several deformed structures were proposed and investigated. In this paper we present directional emission micro-cavity lasers with limason-shaped, triangle-shaped, and ellipse shaped cavity structures. In experiment, mid-infrared InGaAs/InAlAs quantum cascade material was employed to fabricate these micro-cavity lasers, due to its advantages of lack of surface recombination, and inherently in-plane with transverse magnetic (TM) mode emission. The micro-cavity lasers with different device structures were operated and compared at room temperature, and a higher output power was also achieved by increasing the device structure size.
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Chang-ling Yan, Chang-ling Yan, Jian-wei Shi, Jian-wei Shi, Yuan Feng, Yuan Feng, Yong-qin Hao, Yong-qin Hao, Hui Li, Hui Li, Jian-jia Zhang, Jian-jia Zhang, Peng Li, Peng Li, Jia-bin Wang, Jia-bin Wang, } "Directional emission micro-cavity lasers with different device structures", Proc. SPIE 10019, Optoelectronic Devices and Integration VI, 1001917 (31 October 2016); doi: 10.1117/12.2245515; https://doi.org/10.1117/12.2245515
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