Optimal coupling to high-Q whispering gallery modes with a sub-wavelength metallic grating coupler

• Main Authors: Zhou, Y., Gu, B., Yu, X., Luan, F.
• Other Authors: Kudryashov, Alexis V.
• Format: Conference or Workshop Item
• Language: English
• Published: 2018
• Subjects: Power Coupling; Microresonators; DRNTU::Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/89022; http://hdl.handle.net/10220/47003
• Institution: Nanyang Technological University

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 –...