Apodized focusing subwavelength grating couplers for suspended membrane waveguides
- 3 September 2012
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 101 (10) , 101104
Abstract
We demonstrate an apodized focusing subwavelength grating (SWG) for suspended membrane waveguides on silicon-on-insulator. Finite-difference time-domain simulation predicts −1.7 dB coupling efficiency and a 3 dB bandwidth of ∼50 nm for the transverse-magnetic mode apodized SWG, which has 98% field overlap with propagation mode in the single mode fiber. A modified phase matching formula is proposed to design the focusing apodized SWG. Better than −3.0 dB coupling efficiency and a 3 dB optical bandwidth of ∼50 nm is demonstrated experimentally.Keywords
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