Light control in a hemicylindrical whispering gallery microcavity-parallel plate waveguide system

OPTICS COMMUNICATIONS

卷:474

Article

Parsamyan, Henrik¹  Haroyan, Hovhannes¹  Nerkararyan, Khachatur¹ 

[1] Yerevan State Univ, Dept Microwave Phys & Telecommun, Yerevan, Armenia

关键词: Whispering-gallery modes;    Optical resonators;    Optical modulator;    Q-factor;    Coupling;   

DOI  :  10.1016/j.optcom.2020.126122

来源: Elsevier

【 摘 要 】

We have shown that a structure composed of a semiconductor hemicylinder and a dielectric waveguide separated by a thin metal layer permits efficient and easy light control. In such a system, it is possible to ensure matching between TE and TM modes of a low refractive index waveguide with the corresponding whispering gallery modes of the hemicylinder of a higher refractive index, a circumstance that allows one to reduce the resonator sizes to the order of the exciting wavelength in the vacuum still having rather high Q-factor similar to 2.10(4). Due to pronounced electro-optical properties of the resonator medium, one is able to effectively control the output light intensity by varying the refractive index of the hemicylinder in the order of 10(-4).

【 授权许可】

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