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16 June 2017 Silicon subwavelength structures for communications and sensing (Conference Presentation)
Robert Halir, Juan Manuel Luque-González, Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, Dan-Xia Xu, Jens H. Schmid, Pavel Cheben, Íñigo Molina-Fernández
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Proceedings Volume 10249, Integrated Photonics: Materials, Devices, and Applications IV; 1024904 (2017) https://doi.org/10.1117/12.2267644
Event: SPIE Microtechnologies, 2017, Barcelona, Spain
Abstract
Silicon sub-wavelength structures have found widespread applications in devices ranging from fiber-to-chip couplers to spectrometers. So far, these structures have been mainly used to engineer the local refractive index. Here we focus on two further applications. We describe how to engineer the waveguide electromagnetic field distribution for enhanced evanescent field sensing, predicting a 6-fold enhancement of the sensitivity compared to conventional waveguides. We furthermore report experimental results on broadband multimode interference couplers, which, by leveraging the inherent anisotropy of the sub-wavelength structures, achieve virtually perfect operation over a bandwidth of more than 300nm at telecom wavelengths.
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Robert Halir, Juan Manuel Luque-González, Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, Dan-Xia Xu, Jens H. Schmid, Pavel Cheben, and Íñigo Molina-Fernández "Silicon subwavelength structures for communications and sensing (Conference Presentation)", Proc. SPIE 10249, Integrated Photonics: Materials, Devices, and Applications IV, 1024904 (16 June 2017); https://doi.org/10.1117/12.2267644
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KEYWORDS
Silicon
Waveguides
Anisotropy
Electromagnetism
Fiber couplers
Refractive index
Spectrometers
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