Silicon anisotropy in a bi-dimensional optomechanical cavity

Cauê M. Kersul; Rodrigo Benevides; Flávio Moraes; Gabriel H.M. de Aguiar; Andreas Wallucks; Simon Gröblacher; Gustavo S. Wiederhecker; Thiago P. Mayer Alegre

doi:10.1063/5.0135407

Silicon anisotropy in a bi-dimensional optomechanical cavity

Cauê M. Kersul, Rodrigo Benevides, Flávio Moraes, Gabriel H.M. de Aguiar, Andreas Wallucks, Simon Gröblacher, Gustavo S. Wiederhecker, Thiago P. Mayer Alegre^*

^*Corresponding author for this work

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

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Abstract

In this work, we study the effects of mechanical anisotropy in a 2D optomechanical crystal geometry. We fabricate and measure devices with different orientations, showing the dependence of the mechanical spectrum and the optomechanical coupling on the relative angle of the device to the crystallography directions of silicon. Our results show that the device orientation strongly affects its mechanical band structure, which makes the devices more susceptible to orientation fabrication imperfections. Finally, we show that our device is compatible with cryogenic measurements, reaching a ground state occupancy of 0.25 phonons at mK temperature.

Original language	English
Article number	056112
Number of pages	7
Journal	APL Photonics
Volume	8
Issue number	5
DOIs	https://doi.org/10.1063/5.0135407
Publication status	Published - 2023

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10.1063/5.0135407

056112_1_5.0135407Final published version, 7.21 MBLicence: CC BY

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title = "Silicon anisotropy in a bi-dimensional optomechanical cavity",

abstract = "In this work, we study the effects of mechanical anisotropy in a 2D optomechanical crystal geometry. We fabricate and measure devices with different orientations, showing the dependence of the mechanical spectrum and the optomechanical coupling on the relative angle of the device to the crystallography directions of silicon. Our results show that the device orientation strongly affects its mechanical band structure, which makes the devices more susceptible to orientation fabrication imperfections. Finally, we show that our device is compatible with cryogenic measurements, reaching a ground state occupancy of 0.25 phonons at mK temperature.",

author = "Kersul, {Cau{\^e} M.} and Rodrigo Benevides and Fl{\'a}vio Moraes and {de Aguiar}, {Gabriel H.M.} and Andreas Wallucks and Simon Gr{\"o}blacher and Wiederhecker, {Gustavo S.} and {Mayer Alegre}, {Thiago P.}",

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AU - Kersul, Cauê M.

AU - Benevides, Rodrigo

AU - Moraes, Flávio

AU - de Aguiar, Gabriel H.M.

AU - Wallucks, Andreas

AU - Gröblacher, Simon

AU - Wiederhecker, Gustavo S.

AU - Mayer Alegre, Thiago P.

PY - 2023

Y1 - 2023

N2 - In this work, we study the effects of mechanical anisotropy in a 2D optomechanical crystal geometry. We fabricate and measure devices with different orientations, showing the dependence of the mechanical spectrum and the optomechanical coupling on the relative angle of the device to the crystallography directions of silicon. Our results show that the device orientation strongly affects its mechanical band structure, which makes the devices more susceptible to orientation fabrication imperfections. Finally, we show that our device is compatible with cryogenic measurements, reaching a ground state occupancy of 0.25 phonons at mK temperature.

AB - In this work, we study the effects of mechanical anisotropy in a 2D optomechanical crystal geometry. We fabricate and measure devices with different orientations, showing the dependence of the mechanical spectrum and the optomechanical coupling on the relative angle of the device to the crystallography directions of silicon. Our results show that the device orientation strongly affects its mechanical band structure, which makes the devices more susceptible to orientation fabrication imperfections. Finally, we show that our device is compatible with cryogenic measurements, reaching a ground state occupancy of 0.25 phonons at mK temperature.

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VL - 8

JO - APL Photonics

JF - APL Photonics

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M1 - 056112

ER -

Silicon anisotropy in a bi-dimensional optomechanical cavity

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