Grating-coupled silicon-on-sapphire integrated slot waveguides operating at mid-infrared wavelengths

We demonstrate subwavelength bidirectional grating (SWG) coupled slot waveguide fabricated in silicon-on-sapphire for transverse electric polarized wave operation at 3.4 μm wavelength. Coupling efficiency of 29% for SWG coupler is experimentally achieved. Propagation loss of 11  dB/cm has been exper...

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Bibliographic Details
Published inOptics letters Vol. 39; no. 10; p. 3070
Main Authors Zou, Yi, Subbaraman, Harish, Chakravarty, Swapnajit, Xu, Xiaochuan, Hosseini, Amir, Lai, Wei-Cheng, Wray, Parker, Chen, Ray T
Format Journal Article
LanguageEnglish
Published United States 15.05.2014
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Summary:We demonstrate subwavelength bidirectional grating (SWG) coupled slot waveguide fabricated in silicon-on-sapphire for transverse electric polarized wave operation at 3.4 μm wavelength. Coupling efficiency of 29% for SWG coupler is experimentally achieved. Propagation loss of 11  dB/cm has been experimentally obtained for slot waveguides. Two-step taper mode converters with an insertion loss of 0.13 dB are used to gradually convert the strip waveguide mode into slot waveguide mode.
ISSN:1539-4794
DOI:10.1364/ol.39.003070