Suspended Z-cut lithium niobate waveguides for stimulated Brillouin scattering
Date
2025
Authors
Haerteis, L.S.
Gao, Y.
Dubey, A.
Schmidt, M.K.
Thurgood, P.
Ren, G.
Schröder, J.
Marpaung, D.
Mitchell, A.
Steel, M.J.
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Journal article
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APL Photonics, 2025; 10(9):096112 -1-096112 -9
Statement of Responsibility
Lisa-Sophie Haerteis, Yan Gao, Aditya Dubey, Mikołaj K. Schmidt, Peter Thurgood, Guanghui Ren, Jochen Schröder, David Marpaung, Arnan Mitchell, Michael J. Steel, Andreas Boes
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Abstract
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 spectrumduetotheexcitationofhigher-orderacousticmodes.ThefindingsexpandtheTFLNwaveguideplatformexplorationforSBSinteractions and provide a crucial step toward realizing advanced optical processors for sensors or microwave signals integrated on TFLN.
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© 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).