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Mode characteristics of semiconductor equilateral triangle microcavities with side length of 5-20 μm

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7 Author(s)
Qiao-Yin Lu ; State Key Lab. on Integrated Optoelectronics, Chinese Acad. of Sci., Beijing, China ; Xiao-Hong Chen ; Wei-Hua Guo ; Li-Juan Yu
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Semiconductor equilateral triangle microresonators (ETRs) with side length of 5, 10, and 20 μm are fabricated by the two-step inductively coupled plasma (ICP) etching technique. The mode properties of fabricated InGaAsP ETRs are investigated experimentally by photoluminescence (PL) with the pumping source of a 980-nm semiconductor laser and distinct peaks are observed in the measured PL spectra. The wavelength spacings of the distinct peaks agree very well with the theoretical longitudinal mode intervals of the fundamental transverse modes in the ETRs, which verifies that the distinct peaks are corresponding to the enhancement of resonant modes. The mode quality factors are calculated from the width of the resonant peaks of the PL spectra, which are about 100 for the ETR with side length of 20 μm.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 2 )