Brillouin spectroscopy of a hybrid silicon-chalcogenide waveguide with geometrical variations.
Opt Lett
; 43(15): 3493-3496, 2018 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-30067693
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.
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MEDLINE
Idioma:
En
Revista:
Opt Lett
Ano de publicação:
2018
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Article