Polarization-dependent coupling between a polarization-independent high-index-contrast subwavelength grating and waveguides

We investigated the optical coupling between a polarization-independent high-index-contrast subwavelength grating (HCG) and two orthogonal in-plane waveguides. We fabricated the HCG with waveguides on a silicon-on-insulator substrate and demonstrated that a waveguide with a strong output is switched...

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Bibliographic Details
Published inApplied physics express Vol. 9; no. 7; pp. 72703 - 72706
Main Authors Katayama, Takeo, Ito, Jun, Kawaguchi, Hitoshi
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.07.2016
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Summary:We investigated the optical coupling between a polarization-independent high-index-contrast subwavelength grating (HCG) and two orthogonal in-plane waveguides. We fabricated the HCG with waveguides on a silicon-on-insulator substrate and demonstrated that a waveguide with a strong output is switched by changing the polarization of light injected into the HCG. The light coupled more strongly to the waveguide in the direction perpendicular to the polarization of the incident light than to that in the parallel direction. If this waveguide-coupled HCG is incorporated into a polarization bistable vertical-cavity surface-emitting laser (VCSEL), the output waveguide can be switched by changing the lasing polarization of the VCSEL.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.9.072703