Abstract
In this report, we investigate the fabrication process of 12-fold
quasi-photonic crystal microcavity with size-controlled nano-post beneath
for electrically-driven structure by fine-tuning the wet-etching time. By
finite-element method, we simulate and analyze the heat transfer behaviors
of microcavities with different nano-post sizes and shapes. From the real
devices, we obtain whispering-gallery (WG) single-mode lasing action with
high measured quality factor of 8 250 and low threshold of 0.6 mW when the
nano-post size is as large as 830 nm in diameter. By varying the substrate
temperature, WG single-mode lasing action is still obtained when the
substrate temperature is as high as 70$^{\circ}$C. Besides, the lasing wavelength red-shift rate is also improved
compared with the microcavity without nano-post beneath. By varying the pump
condition, lasing action is still observed at room temperature when the pump
duty cycle increases to 16.0%. Thus, for electrically-driven photonic
crystal microcavity lasers, this nano-post can serve as current injection
pathway and heat sink at the same time.
© 2009 IEEE
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