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10 March 2015 Demonstration of continuous-wave microsquare lasers and comparison to microdisk laser
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Proceedings Volume 9382, Novel In-Plane Semiconductor Lasers XIV; 93821D (2015)
Event: SPIE OPTO, 2015, San Francisco, California, United States
Optically-pumped microsquare cavity laser on InP-based multiple-quantum-wells (MQW) material platform is demonstrated. Continuous wave operation is achieved for microsquare cavity with footprint as small as 4×4μm2. Numerical mode analysis and experimental characterization of the microsquare laser are conducted, and the results are compared with the commonly used microdisk cavity laser fabricated on the same platform. The microsquare laser shows a lower lasing threshold and infers a higher differential efficiency than the microdisk counterpart. The microsquare cavity laser has sufficiently high quality factor, and higher pumping injection efficiency due to the more evenly distributed field profile as compared to that of the microdisk. Experimental result also shows that the microsquare laser has better temperature stability than the microdisk. These results promise a potential alternative laser structure for onchip light source applications.
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Chee-Wei Lee, Qian Wang, Yicheng Lai, Doris K. Ng, and Siu Kit Ng "Demonstration of continuous-wave microsquare lasers and comparison to microdisk laser", Proc. SPIE 9382, Novel In-Plane Semiconductor Lasers XIV, 93821D (10 March 2015);

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