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Hybrid AlGaInAs/Si Fabry–Pérot lasers with near-total mode confinements

Journal of Semiconductors 2018年第8期39卷 41-46页

作者： Yuede Yang Shaoshuai Sui Mingying Tang Jinlong Xiao Yun Du Andrew W.Poon Yongzhen Huang State Key Laboratory of Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Photonic Device Laboratory Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology

We have proposed and demonstrated hybrid Al Ga In As/Si Fabry–Pérot(FP) lasers, with the FP cavity facet covered by the p-electrode metal for enhancing mode confinement. Continuous-wave lasing is obtained at room temperature with a threshold current of 45 m A for the hybrid FP laser with a cavity length of 415 μm and a width of 7 μm. Near-field optical microscope images indicate an efficient output emission from the underneath evanescently-coupled silicon waveguide. Furthermore, single-mode lasing with a side-mode suppression-ratio of29 d B and a threshold current of 16 m A is realized for the 150 μm-long hybrid FP laser.

关键词： hybrid AlGaInAs/Si laser Fabry–Pérot cavity mode q factor metal confinement

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Analysis of mode characteristics for microcircular resonators confined by different metallic materials

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Journal of Semiconductors 2016年第12期37卷 51-58页

作者：姚齐峰黄永箴杨跃德肖金龙 State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of Sciences Beijing Engineering Research Center of Optoelectronic Information and Instrument Beijing Information Science and Technology University

mode characteristics of metallically confined microcircular resonators are theoretically studied by solv- ing eigenvalue equations for two-dimensional multilayer structures. The influences of conventional metals includ- ing Au, Ag, Cu, A1, and Ti, on the mode wavelengths and q factors of whispering gallery modes （WGMs） are an- alyzed and compared. The results show silver has the best optical confinement among these metals, and aluminum presents similar behavior to Au. However, Ti, which is usually applied to enhance the adhesion of p-electrode to semiconductors, results in a great dissipation for confined modes. Furthermore, circular microlasers with A1 as both p-electrode and optical confinement medium are fabricated, and continuous-wave operations are realized at room temperature for the microlasers with a radius of 15μm.

关键词： resonators whispering gallery modes mode q factor metallic dissipation microlasers

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