@inproceedings { wang2016broadban, title = {Broadband Bidirectional Vertical Grating Coupler}, journal = {Optical Fiber Communication Conference}, year = {2016}, month = {03/2016}, pages = {W2A--16}, publisher = {Optical Society of America}, organization = {Optical Society of America}, type = {inproceedings}, author = { Wang, Yun and Yun, Han and Jaeger, Nicolas A and Chrostowski, Lukas } }