2026-04-14T02:13:07Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4529112025-12-23T15:21:59Zcom_2072_98col_2072_378195

Engineering nanoscale hypersonic phonon transport Florez, Omar Arregui Bravo, Guillermo Albrechtsen, Marcus Ng, Ryan C. Gomis-Bresco, Jordi Stobbe, Søren Sotomayor Torres, Clivia M. García Fernández, Pedro David Controlling the vibrations in solids is crucial to tailor their mechanical properties and their interaction with light. Thermal vibrations represent a source of noise and dephasing for many physical processes at the quantum level. One strategy to avoid these vibrations is to structure a solid such that it possesses a phononic stop band, i.e., a frequency range over which there are no available mechanical modes. Here, we demonstrate the complete absence of mechanical vibrations at room temperature over a broad spectral window, with a 5.3 GHz wide band gap centered at 8.4 GHz in a patterned silicon nanostructure membrane measured using Brillouin light scattering spectroscopy. By constructing a line-defect waveguide, we directly measure GHz localized modes at room temperature. Our experimental results of thermally excited guided mechanical modes at GHz frequencies provides an eficient platform for photon-phonon integration with applications in optomechanics and signal processing transduction. 2022 Prepublicació https://ddd.uab.cat/record/274647 urn:10.48550/arXiv.2202.02166 urn:oai:ddd.uab.cat:274647 urn:icn2uab:6565477 eng European Commission 897148 European Commission 824140 European Commission 754558 Agencia Estatal de Investigación RTI2018-093921-A-C44 Agencia Estatal de Investigación PGC2018-101743-B-I00 Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad RYC-2015-18124 Florez, O. ; Arregui, G.; Albrechtsen, M. ; Ng, R. C. ; Gomis-Bresco, J. ; Stobbe, S. ; Sotomayor Torres, C. M. and García, P. D. «Engineering nanoscale hypersonic phonon transport». Nature nanotechnology, vol. 17, issue 9 (Sep. 2022), p. 947-951 ; https://doi.org/10.1038/s41565-022-01178-1 open access Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. https://creativecommons.org/licenses/by/4.0/ application/pdf