9 February 2009 Room temperature continuous-wave electrically injected InGaAsP triangle and square microlasers
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Microcavity lasers with whispering-gallery modes (WGMs) are potential light sources for photonic integrated circuits. However, the direction emission and output power are greatly limited for microdisks with the WGMs confined by total internal reflection. Deformed microdisk with chaos mode light rays or evanescently coupled waveguide were used to realize directional emission microlasers. Different from the microdisk with traveling wave WGMs, confined modes in triangle and square microcavities are standing wave WGMs. So the confined modes can still have high Q-factors if an output waveguide is directly connected to triangle and square microcavities at the position with weak mode field distribution. Based on theoretical analysis and numerical simulation of the mode characteristics, we fabricate directional emission triangle and square InGaAsP/InP microcavity lasers with an output waveguide directly connected to the resonators by standard photolithography and inductively coupled plasma etching technique. Continuous-wave (CW) electrically injected InGaAsP triangle and square microlasers are realized at room temperature for the triangle microlasers with side length from 10 to 30 μm and the square microlaser with the side length of 20 μm.
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Yong-Zhen Huang, Yong-Zhen Huang, Shi-Jiang Wang, Shi-Jiang Wang, Kai-Jun Che, Kai-Jun Che, Yue-De Yang, Yue-De Yang, Jin-Long Xiao, Jin-Long Xiao, Yong-Hong Hu, Yong-Hong Hu, Yun Du, Yun Du, } "Room temperature continuous-wave electrically injected InGaAsP triangle and square microlasers", Proc. SPIE 7158, 2008 International Conference on Optical Instruments and Technology: Microelectronic and Optoelectronic Devices and Integration, 715806 (9 February 2009); doi: 10.1117/12.810662; https://doi.org/10.1117/12.810662

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