Brillouin spectroscopy of a hybrid silicon-chalcogenide waveguide with geometrical variations
Year: 2018
Type: article
Abstract: Recent advances in design and fabrication of photonic-phononic waveguides have enabled stimulated Brillouin scattering in silicon-based platforms such as underetched silicon waveguides and hybrid waveguides. Due to the sophisticated design and, more importantly, high sensitivity of the Brillouin resonances to geometrical variations in micro- and nano-scale structures, it is necessary to have access to the localized opto-acoustic response along those waveguides to monitor their uniformity and maximize their interaction strength. In this Letter, we design and fabricate photonic-phononic waveguides with a deliberate width variation on a hybrid silicon-chalcogenide photonic chip and confirm the effect of the geometrical variation on the localized Brillouin response using a distributed Brillouin measurement.
Source: Optics Letters
DOI: 10.1364/ol.43.003493
Authors: Atiyeh Zarifi, Birgit Stiller, Moritz Merklein, Yang Liu, Blair Morrison, Alvaro Casas-Bedoya, Guanghui Ren, Thach G. Nguyen, Khu Vu, Duk-Yong Choi, Arnan Mitchell, Steven J. Madden, Benjamin J. Eggleton
Language: English
Topic: Photonic and Optical Devices
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Funder: Australian Research Council
OpenAlex ID: W2805523656