Yue-De Yang, Hai-Zhong Weng, Jin-Long Xiao, and Yong-Zhen Huang *
State Key Laboratory on Integrated Optoelectronics,
Institute of Semiconductors & University of Chinese Academy of Sciences,
Chinese Academy of Sciences, Beijing 100083, China
* Email: yzhuang@semi.ac.cn
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Abstract: Dual-transverse-mode AlGaInAs/InP square microlasers with the frequency intervals in the range from several GHz to sub-THz are demonstrated. A sub-THz signal of 103.2 GHz is successfully obtained with a uni-traveling-carrier photodiode. For extending the frequency range to THz, deformed square microlasers with the flat sidewalls replaced by circular-arcs are proposed. An increase of mode interval and an enhancement of mode quality factor are realized simultaneously according to numerical simulation results. Furthermore, the stability of dual-mode lasing is verified by a nonlinear gain analysis based on the simulated mode field distributions. For the AlGaInAs/InP deformed square microlasers, beating signals with the frequencies of 0.43, 0.31, and 0.16 THz are demonstrated by an autocorrelation measurement, which indicate the microlasers as a novel architecture for the THz wave generation.
Keywords: Dual-mode lasing, Square microlaser, Optical heterodyne, Terahertz wave.
Received: 2017-9-25
Published: 2017-9-30
Acknowledgment: The authors would like to thank Osamu Wada of Kobe University, Jin Li, Bing Xiong, Chang-Zheng Sun and Yi Luo of Tsinghua University for the support of THz measurement and valuable discussions.
Cite this article:
Yue-De Yang, Hai-Zhong Weng, Jin-Long Xiao, and Yong-Zhen Huang. Dual-mode AlGaInAs/InP square microlasers for terahertz generation[J]. International Journal of Terahertz Science and Technology, 2017, Vol.10, No.3: 77-86. DOI:10.11906/TST.077-086.2017.09.06
URL: http://www.tstnetwork.org/10.11906/TST.077-086.2017.09.06
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