%0 Conference Paper %B Conference on Lasers and Electro-Optics %D 2015 %T Apodized Focusing Fully Etched Sub-wavelength Grating Couplers With Ultra-low Reflections %A , Yun Wang %A Yun, Han %A , Zeqin Lu %A , Richard Bojko %A , Fan Zhang %A , Michael Caverley %A , Nicolas Jaeger %A , Lukas Chrostowski %I Optical Society of America %K Gratings; Effective medium theory ; Subwavelength structures %P SM1I.6 %U http://www.osapublishing.org/abstract.cfm?URI=CLEO_SI-2015-SM1I.6 %X We experimentally demonstrated apodized focusing fully etched sub-wavelength grating couplers for the transverse electric (TE) mode. An insertion loss of 4.2 dB, 1-dB bandwidth of 36 nm, and back reflection of -24 dB have been obtained. %8 05/2015 %9 inproceedings