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Output Coupling and Spectral Control in 1550-nm Micro-Disc Lasers Using Defects on the Rim

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7 Author(s)
Xinlun Cai ; Dept. of Electr. & Electron. Eng., Univ. of Bristol, Bristol, UK ; Mezosi, G. ; Sorel, M. ; Zhuoran Wang
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We demonstrated room-temperature continuous-wave (RTCW) operation of electrically driven in-plane emitting micro-disc lasers with radius of 10 μm. The disk cavity was fabricated using high resolution electron beam lithography based on hydrogen silsesquioxane (HSQ) and BCl3-Cl2-Ar inductively coupled plasma etching. By using circular bump or notch defects on the circumference as output coupling as well as mode control mechanisms, single-mode operation for large bump defect lasers with sidemode suppression ratio larger than 30 dB was observed, with highly directional output emission.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 21 )