SWG dispersion engineering for ultra-broadband photonic devices

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DOIResolve DOI: http://doi.org/10.1117/12.2017229
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TypeArticle
Proceedings titleSPIE - International Society for Optical Engineering. Proceedings
ConferenceIntegrated Photonics: Materials, Devices, and Applications II, 24 April 2013 through 26 April 2013, Grenoble
ISSN0277-786X
ISBN9780819495648
Volume8767
Article number87670R
SubjectBroadband device; Dispersion engineering; Multi-mode interference; Passive waveguides; Silicon on insulator; Sub-wave length grating; Diffraction gratings; Directional couplers; Dispersion (waves); Optical waveguides; Photonics; Refractive index; Silicon on insulator technology; Ultra-wideband (UWB); Dispersions
AbstractIn most integrated optics platforms device design is restricted to variations in the lateral dimensions, and a small set of etch depths. Sub-wavelength gratings (SWGs) in silicon-on-insulator enable engineering of refractive index in a wide range. SWGs exhibit a pitch smaller than the wavelength of light propagating through them, thereby suppressing diffraction and acting as a homogenous medium with an equivalent refractive index controlled by the duty-cycle. Here, we propose to not only engineer refractive index, but to control SWG dispersion. We use this concept to design ultra-broadband directional couplers (DCs) and multimode interference couplers (MMIs) with a fivefold bandwidth enhancement compared to conventional devices. © 2013 SPIE.
Publication date
LanguageEnglish
AffiliationNRC Institute for Microstructural Sciences; National Research Council Canada
Peer reviewedYes
NPARC number21270559
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Record identifierb3b60622-4aac-4011-a1aa-559e022e0891
Record created2014-02-17
Record modified2017-04-24
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