Suspended silicon waveguides for long-wave infrared wavelengths
Optics
2017-12-20 v2
Abstract
In this paper we report suspended silicon waveguides operating at a wavelength of 7.67 mm with a propagation loss of 3.1 ? 0.3 dB/cm. To our knowledge this is the first demonstration of low loss silicon waveguides at such a long wavelength, with loss comparable to other platforms that use more exotic materials. The suspended Si waveguide core is supported by a subwavelength grating that provides lateral optical confinement, while also allowing access to the buried oxide layer so that it can be wet etched using hydrofluoric acid. We also demonstrate low loss waveguide bends and s-bends.
Keywords
Cite
@article{arxiv.1711.03468,
title = {Suspended silicon waveguides for long-wave infrared wavelengths},
author = {J. Soler Penadés and A. Sánchez-Postigo and M. Nedeljkovic and A. Ortega-Moñux and J. G. Wangüemert-Pérez and Y. Xu and R. Halir and Z. Qu and A. Z. Khokhar and A. Osman and W. Cao and C. G. Littlejohns and P. Cheben and I. Molina-Fernández and G. Z. Mashanovich},
journal= {arXiv preprint arXiv:1711.03468},
year = {2017}
}
Comments
4 pages, 4 figures, accepted version