RT Journal Article
T1 Suspended silicon waveguides for long-wave infrared wavelengths
A1 Soler Penadés, Jordi
A1 Sánchez-Postigo, Alejandro
A1 Nedeljkovic, Milos
A1 Ortega-Moñux, Alejandro
A1 Wanguemert-Pérez, Juan Gonzalo
A1 Xu, Yolanda
A1 Halir, Robert
A1 Qu, Zhibo
A1 Khokhar, Ali Z.
A1 Osman, Ahmed
A1 Cao, Wei
A1 Littlejohns, Callum G.
A1 Cheben, Pavel
A1 Molina-Fernández, Íñigo
A1 Mashanovich, Goran Z.
K1 Fotónica
AB In this Letter, we report suspended silicon waveguides operating at a wavelength of 7.67 μm 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 sub-wavelength 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.
PB Optica Publishing Group
YR 2018
FD 2018-02-09
LK https://hdl.handle.net/10630/33537
UL https://hdl.handle.net/10630/33537
LA eng
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026