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|Title:||Optimal coupling to high-Q whispering gallery modes with a sub-wavelength metallic grating coupler||Authors:||Zhou, Y.
DRNTU::Engineering::Electrical and electronic engineering
|Issue Date:||2015||Source:||Zhou, Y., Gu, B., Yu, X., & Luan, F. (2015). Optimal coupling to high-Q whispering gallery modes with a sub-wavelength metallic grating coupler. Proceedings of SPIE - Laser Resonators, Microresonators, and Beam Control XVII, 9343, 934315-. doi:10.1117/12.2079102||Abstract:||Gold grating patterned on the end facet of an optical fiber is able to excite whispering gallery mode (WGM) in a silica microsphere. With a direct pathway of the metal reflection, the coupled WGM is able to superimpose and create an asymmetric Fano resonance. Since multiple resonances are present – the WGM, grating reflection, and a weak Fabry-Perot resonance along the diameter of the sphere – it is difficult to evaluate the power efficiency directly from the measured spectrum. Using temporal coupled-mode theory, a general model is constructed for the end-fire coupling from a grating to a WGM resonator.||URI:||https://hdl.handle.net/10356/89022
|DOI:||10.1117/12.2079102||Rights:||© 2015 Society of Photo-optical Instrumentation Engineers (SPIE). This paper was published in Proceedings of SPIE - Laser Resonators, Microresonators, and Beam Control XVII and is made available as an electronic reprint (preprint) with permission of Society of Photo-optical Instrumentation Engineers (SPIE). The published version is available at: [http://dx.doi.org/10.1117/12.2079102]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||EEE Conference Papers|
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