dc.contributor.authorChen, Nan
dc.contributor.authorDong, Bowei
dc.contributor.authorLuo, Xianshu
dc.contributor.authorWang, Hong
dc.contributor.authorSingh, Navab
dc.contributor.authorLo, Guo-Qiang
dc.contributor.authorLee, Chengkuo
dc.identifier.citationChen, N., Dong, B., Luo, X., Wang, H., Singh, N., Lo, G.-Q., & Lee, C. (2018). Efficient and broadband subwavelength grating coupler for 3.7 μm mid-infrared silicon photonics integration. Optics Express, 26(20), 26242-26256. doi:10.1364/OE.26.026242en_US
dc.description.abstractA grating coupler is an essential building block for compact and flexible photonics integration. In order to meet the increasing demand of mid-infrared (MIR) integrated photonics for sensitive chemical/gas sensing, we report a silicon-on-insulator (SOI) based MIR subwavelength grating coupler (SWGC) operating in the 3.7 μm wavelength range. We provide the design guidelines of a uniform and apodized SWGC, followed by numerical simulations for design verification. We experimentally demonstrate both types of SWGC. The apodized SWGC enables high coupling efficiency of −6.477 dB/facet with 3 dB bandwidth of 199 nm, whereas the uniform SWGC shows larger 3dB bandwidth of 263.5 nm but slightly lower coupling efficiency of −7.371 dB/facet.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.format.extent15 p.en_US
dc.relation.ispartofseriesOptics Expressen_US
dc.rights© 2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.en_US
dc.subjectSilicon Photonics Integrationen_US
dc.subjectGrating Coupleren_US
dc.subjectDRNTU::Engineering::Electrical and electronic engineeringen_US
dc.titleEfficient and broadband subwavelength grating coupler for 3.7 μm mid-infrared silicon photonics integrationen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.description.versionPublished versionen_US

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