Tolerant wideband high-efficiency grating coupler for TM mode excitation

• Main Authors: Liow, Tsung-Yang, Zhang, Jing, Shum, Perry Ping, Xiao, Zhe, Luan, Feng
• Other Authors: School of Electrical and Electronic Engineering
• Format: Conference or Workshop Item
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/97944; http://hdl.handle.net/10220/12176
• Institution: Nanyang Technological University

An optimized grating coupler featuring both ultra-broad bandwidth and high-efficiency has been achieved for the first time for the +1 diffraction order at a central operating wavelength 1.55 μm for TM polarization in horizontal slot waveguides. With proper design of the thickness of the groove thick...