Suspended Z-cut lithium niobate waveguides for stimulated Brillouin scattering
Journal article, 2025
On-chip stimulated Brillouin scattering (SBS) has recently been demonstrated in thin-film lithium niobate (TFLN), an emerging material platform for integrated photonics offering large electro-optic and nonlinear properties. While previous works on SBS in TFLN have focused on surface SBS, in this contribution we experimentally demonstrate, for the first time, backward intra-modal SBS generation in suspended Z-cut TFLN waveguides. Our results show trapping of multiple acoustic modes in this structure, featuring a multi-peak Brillouin gain spectrum due to the excitation of higher-order acoustic modes. The findings expand the TFLN waveguide platform exploration for SBS interactions and provide a crucial step toward realizing advanced optical processors for sensors or microwave signals integrated on TFLN.
Author
Lisa Sophie Haerteis
Australian Research Council (ARC) Discovery Project Funding and Discovery International Award (DIA)
University of Adelaide
Yan Gao
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Aditya Dubey
Australian Research Council (ARC) Discovery Project Funding and Discovery International Award (DIA)
RMIT University
Mikołaj K. Schmidt
Macquarie University
Peter Thurgood
RMIT University
Australian Research Council (ARC) Discovery Project Funding and Discovery International Award (DIA)
Guanghui Ren
RMIT University
Australian Research Council (ARC) Discovery Project Funding and Discovery International Award (DIA)
Jochen Schröder
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
David Marpaung
MESA Institute for Nanotechnology
Arnan Mitchell
RMIT University
Australian Research Council (ARC) Discovery Project Funding and Discovery International Award (DIA)
Michael J. Steel
Macquarie University
Andreas Boes
University of Adelaide
Australian Research Council (ARC) Discovery Project Funding and Discovery International Award (DIA)
APL Photonics
2378-0967 (eISSN)
Vol. 10 9 096112Helintegrerad suppereffektiv frekvenskam-sändare
Swedish Research Council (VR) (2021-04241), 2022-01-01 -- 2025-12-31.
Subject Categories (SSIF 2025)
Condensed Matter Physics
Telecommunications
DOI
10.1063/5.0274854