Suspended Z-cut lithium niobate waveguides for stimulated Brillouin scattering

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

doi:10.1063/5.0274854

Suspended Z-cut lithium niobate waveguides for stimulated Brillouin scattering

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

^*Corresponding author for this work

School of Mathematical and Physical Sciences

Research output: Contribution to journal › Article › peer-review

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 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.

Original language	English
Article number	096112
Pages (from-to)	096112-1-096112-8
Number of pages	8
Journal	APL Photonics
Volume	10
Issue number	9
DOIs	https://doi.org/10.1063/5.0274854
Publication status	Published - 1 Sept 2025

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10.1063/5.0274854Licence: CC BY

Publisher version (open access)Final published version, 5.34 MBLicence: CC BY

Cite this

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title = "Suspended Z-cut lithium niobate waveguides for stimulated Brillouin scattering",

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 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 and Yan Gao and Aditya Dubey and Schmidt, \{Miko{\l}aj K.\} and Peter Thurgood and Guanghui Ren and Jochen Schr{\"o}der and David Marpaung and Arnan Mitchell and Steel, \{Michael J.\} and Andreas Boes",

note = "{\textcopyright} 2025 Author(s). Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

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doi = "10.1063/5.0274854",

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TY - JOUR

T1 - Suspended Z-cut lithium niobate waveguides for stimulated Brillouin scattering

AU - Haerteis, Lisa-Sophie

AU - Gao, Yan

AU - Dubey, Aditya

AU - Schmidt, Mikołaj K.

AU - Thurgood, Peter

AU - Ren, Guanghui

AU - Schröder, Jochen

AU - Marpaung, David

AU - Mitchell, Arnan

AU - Steel, Michael J.

AU - Boes, Andreas

PY - 2025/9/1

Y1 - 2025/9/1

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/105016584268

UR - http://purl.org/au-research/grants/arc/DP220100488

UR - http://purl.org/au-research/grants/arc/DE230100964

UR - http://purl.org/au-research/grants/arc/DE220101272

U2 - 10.1063/5.0274854

DO - 10.1063/5.0274854

M3 - Article

AN - SCOPUS:105016584268

SN - 2378-0967

VL - 10

SP - 096112-1-096112-8

JO - APL Photonics

JF - APL Photonics

IS - 9

M1 - 096112

ER -

Suspended Z-cut lithium niobate waveguides for stimulated Brillouin scattering

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Suspended Z-cut lithium niobate waveguides for stimulated Brillouin scattering

Abstract

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DP22: Pumping up the volume on chip-scale sound light interactions

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