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Lasing on higher-order whispering gallery modes at room temperature

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5 Author(s)
Chen, Chih-Yao ; Inst. of Photonics Technol., Nat. Tsing-Hua Univ., Hsinchu, Taiwan ; Yuan Yao Lin ; Ching-Jen Cheng ; Lee, Tsin-Dong
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We report a direct method to observe higher-order whispering gallery modes in vertical cavity surface emitting lasers (VCSELs) at room temperature. Instead of introducing any defect mode, we show that suppression of lower-order cavity modes can be achieved by destroying vertical reflectors with a surface micro-structure. Perfect whispering gallery modes with an azimuthal number as large as 41 are observed in experiments through collecting near-field radiation patterns, as well as in numerical simulations.

Published in:

Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference. CLEO/QELS 2009. Conference on

Date of Conference:

2-4 June 2009