Design for broadband high-efficiency grating couplers

• المؤلفون الرئيسيون: Xiao, Zhe, Luan, Feng, Liow, Tsung-Yang, Zhang, Jing, Shum, Perry Ping
• مؤلفون آخرون: School of Electrical and Electronic Engineering
• التنسيق: مقال
• اللغة: English
• منشور في: 2013
• الموضوعات: DRNTU::Engineering::Electrical and electronic engineering
• الوصول للمادة أونلاين: https://hdl.handle.net/10356/99207; http://hdl.handle.net/10220/10945
• المؤسسة: Nanyang Technological University

In this Letter, we propose general optimization methods to design broadband high-efficiency grating couplers for planar waveguides. We attribute the coupling bandwidth to the mismatch of effective indices between the diffracted beam and the actual grating structure around the operation wavelength fo...