Influence of output waveguide on mode quality factor in semiconductor microlasers with an equilateral triangle resonator

Huang, Yong-Zhen; Yong-Zhen Huang; Guo, Wei-Hua; Wei-Hua Guo; Wang, Qi-Ming; Qi-Ming Wang
November 2000
Applied Physics Letters;11/27/2000, Vol. 77 Issue 22
Academic Journal
Semiconductor microlasers with an equilateral triangle resonator (ETR) and an output waveguide are proposed and analyzed by the finite-difference time-domain technique and the Padé approximation. The numerical results show that microlasers with an output waveguide still have a high-quality factor (Q factor) and are suitable to realize directional emission. For the ETR with a 0.46-μm-width opening in one of the vertices connected to the output waveguide, we have the Q factor of 1.5x10[sup 3] and 2.5x10[sup 2] for the TM fundamental mode at the wavelength of 1.55 μm, as the side length of the ETR is 5 and 3 μm. The simulated intensity distributions are presented for the fundamental mode in the ETR with a side length of 3 μm and an opening of 0.23 μm. © 2000 American Institute of Physics.


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