@article { Yun2016OL, title = {Broadband 2??2 adiabatic 3??dB coupler using silicon-on-insulator sub-wavelength grating waveguides}, journal = {Optics Letters}, volume = {41}, year = {2016}, month = {06/2016}, pages = {3041-3044}, chapter = {3041}, URL = {https://www.osapublishing.org/ol/abstract.cfm?uri=ol-41-13-3041}, author = {Han Yun and Yun Wang and Fan Zhang and Zeqin Lu and Stephen Lin and Lukas Chrostowski and Nicolas A. F. Jaeger} }