Acoustic cavities in 2D heterostructures

Maxim K. Zalalutdinov; Jeremy T. Robinson; Jose J. Fonseca; Samuel W. LaGasse; Tribhuwan Pandey; Lucas R. Lindsay; Thomas L. Reinecke; Douglas M. Photiadis; James C. Culbertson; Cory D. Cress; Brian H. Houston

doi:10.1038/s41467-021-23359-7

Acoustic cavities in 2D heterostructures

Maxim K. Zalalutdinov, Jeremy T. Robinson, Jose J. Fonseca, Samuel W. LaGasse, Tribhuwan Pandey, Lucas R. Lindsay, Thomas L. Reinecke, Douglas M. Photiadis, James C. Culbertson, Cory D. Cress, Brian H. Houston

Materials Theory

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

33 Scopus citations

Abstract

Two-dimensional (2D) materials offer unique opportunities in engineering the ultrafast spatiotemporal response of composite nanomechanical structures. In this work, we report on high frequency, high quality factor (Q) 2D acoustic cavities operating in the 50–600 GHz frequency (f) range with f × Q up to 1 × 10¹⁴. Monolayer steps and material interfaces expand cavity functionality, as demonstrated by building adjacent cavities that are isolated or strongly-coupled, as well as a frequency comb generator in MoS₂/h-BN systems. Energy dissipation measurements in 2D cavities are compared with attenuation derived from phonon-phonon scattering rates calculated using a fully microscopic ab initio approach. Phonon lifetime calculations extended to low frequencies (<1 THz) and combined with sound propagation analysis in ultrathin plates provide a framework for designing acoustic cavities that approach their fundamental performance limit. These results provide a pathway for developing platforms employing phonon-based signal processing and for exploring the quantum nature of phonons.

Original language	English
Article number	3267
Journal	Nature Communications
Volume	12
Issue number	1
DOIs	https://doi.org/10.1038/s41467-021-23359-7
State	Published - Dec 1 2021

Funding

This work was supported by the Office of Naval Research through base programs at NRL. T.P. is supported by special research funds of University of Antwerp (BOF-UA). L.R.L. acknowledges support for first-principles calculations from the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Material Sciences and Engineering Division. Authors would like to thank Dr. Saikat Dey for help with numerical modeling. This research was performed while J.J.F. and S.W.L. held an NRC Research Associateship award at NRL.

Funders	Funder number
BOF-UA
Office of Naval Research
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Universiteit Antwerpen

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title = "Acoustic cavities in 2D heterostructures",

abstract = "Two-dimensional (2D) materials offer unique opportunities in engineering the ultrafast spatiotemporal response of composite nanomechanical structures. In this work, we report on high frequency, high quality factor (Q) 2D acoustic cavities operating in the 50–600 GHz frequency (f) range with f × Q up to 1 × 1014. Monolayer steps and material interfaces expand cavity functionality, as demonstrated by building adjacent cavities that are isolated or strongly-coupled, as well as a frequency comb generator in MoS2/h-BN systems. Energy dissipation measurements in 2D cavities are compared with attenuation derived from phonon-phonon scattering rates calculated using a fully microscopic ab initio approach. Phonon lifetime calculations extended to low frequencies (<1 THz) and combined with sound propagation analysis in ultrathin plates provide a framework for designing acoustic cavities that approach their fundamental performance limit. These results provide a pathway for developing platforms employing phonon-based signal processing and for exploring the quantum nature of phonons.",

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AU - Lindsay, Lucas R.

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Acoustic cavities in 2D heterostructures

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