Microcavity Laser Emissions Based on Double Hetero-Structure by Locally Modulated Photonic Crystal Waveguide
Journal of Lightwave Technology, Vol. 27, Issue 20, pp. 4394-4400
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Chia-Ho Chen, Tsan-Wen Lu, and Po-Tsung Lee, "Microcavity Laser Emissions Based on Double Hetero-Structure by Locally Modulated Photonic Crystal Waveguide," J. Lightwave Technol. 27, 4394-4400 (2009)
http://www.opticsinfobase.org/JLT/abstract.cfm?URI=JLT-27-20-4394
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In this paper, we design a microcavity with vertical and in-plane emissions by applying double hetero-structure with mode-gap confinement in photonic crystal waveguide. The hetero-structure is formed by modulating the waveguide width locally by slightly shifting the positions of several nearest air-holes outward. By numerical calculations, we simulate the basic mode profiles and quality $(Q)$ factors of each resonance mode. After optimizing the cavity, high simulated $Q$ factor of 110 000 is obtained. From the well-fabricated devices, we observe the lasing emissions with $Q$ factor of 3200 at wavelength of 1593 nm from both vertical and in-plane directions and address the lasing mode by comparing the measured results with the simulated ones. From the simulated heat transition behaviors by finite-element method, we observe the better heat dissipation provided by the waveguide region in this microcavity. This microcavity laser with locally modulated design could be potentially served as a light source with less influence on the nearby components in photonic integrated circuits.
© 2009 IEEE
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