Title :
A single-directional microcavity laser with microloop mirrors and widened medium realized with quantum-well intermixing
Author :
Huang, Y. ; Xiao, Y. ; Xu, G. ; Chang, S. ; Zhao, Y.-G. ; Wang, R. ; Ooi, B.S. ; Ho, S.T.
Author_Institution :
Electr. & Comput. Eng. Dept., Northwestern Univ., Evanston, IL, USA
Abstract :
We describe a linear-geometry microcavity laser with microloops as end reflectors to achieve single-directional output. Finite-difference time-domain simulation is used to optimize the microloop mirror (MLM) performance and simulate the laser operation. We show that a single-directional microlaser with cavity length as small as 25 μm can be realized. A method to obtain higher output power from the microlaser with widened gain medium (WGM) is discussed. An initial fabrication of the MLM-WGM laser with transparent MLM formed by quantum-well intermixing is presented. A low-lasing threshold of /spl sim/0.4 mA is achieved.
Keywords :
finite difference time-domain analysis; laser mirrors; microcavity lasers; micromirrors; quantum well lasers; transparency; 0.4 mA; 25 mum; end reflectors; finite-difference time-domain simulation; laser operation simulation; microcavity laser; microlaser; microloop mirrors; single-directional laser; transparent microloop mirror; widened gain medium; Finite difference methods; Microcavities; Mirrors; Optical device fabrication; Photonic band gap; Power generation; Quantum well lasers; Reflectivity; Ring lasers; Time domain analysis; Finite-difference time-domain (FDTD) methods; laser resonators;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.860066
