Subwavelength metamaterial engineering for silicon photonics

Halir, Robert, Ortega-Moñux, Alejandro, Soler-Penadés, Jordi, Luque-González, Jose M., Sarmiento-Merenguel, Darío, Sánchez-Postigo, Alejandro, Wangüemert-Pérez, Gonzalo, Schmid, Jens, Xu, Dan-Xia, Janz, Siegfried, Lapointe, Jean, Molina-Fernández, Íñigo, Nedeljković, Milos, Mashanovich, Goran Z. and Cheben, Pavel (2017) Subwavelength metamaterial engineering for silicon photonics. SPIE Photonics West 2017, San Francisco, San Francisco, United States. 27 Jan - 01 Feb 2017. (doi:10.1117/12.2253727).

Abstract

Waveguides structured at the subwavelength scale frustrate diffraction and behave as optical metamaterials with controllable refractive index. These structures have found widespread applications in silicon photonics, ranging from sub-decibel efficiency fibre-chip couplers to spectrometers and polarization rotators. Here, we briefly describe the design foundations for sub-wavelength waveguide devices, both in terms of analytic effective medium approximations, as well as through rigorous Floch-Bloquet mode simulation. We then focus on two novel structures that exemplify the use of subwavelength waveguides: mid-infrared waveguides and ultra-broadband beamsplitters.

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Contributors

Author: Jordi Soler-Penadés

Author: Milos Nedeljković

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