Speaker: David García
Affiliation: ICMM-CSIC
Date: Tuesday, 18 June 2024 at 12:00
Location: Seminar Room, Serrano 113b
Precision is a virtue in science and particularly in nanotechnology where carefully fabricated nanometer-scale devices hold great promise in both classical and quantum regimes. Ground- state cooling or phonon amplification require, for example, a sideband resolved photon-phonon coupling where unavoidable imperfections often impose severe performance limits. However, imperfection and disorder are ubiquitous in Nature and emerge with a critical role in nanoscale devices. In this talk, I will explore the limits imposed by imperfection in different nanophotonic and optomechanical nanodevices, but not only. In certain cases, disorder may be invoked to enhance the light-matter interaction in different fields of nanotechnology such as quantum photonics [1] and optomechanics [2, 3]. In the last case, we explore disorder-induced Anderson-localized cavity-optomechanics in a two-dimensional platform with a full phononic gap in the GHz frequency range [4]. The dynamics of this system are strongly nonlinear and complex [5], two important ingredients for neural networks and reservoir computing. References [1] P.D. Garcia, P Lodahl. Physics of Quantum Light Emitters in Disordered Photonic Nanostructures. Annalen der Physik 529, 1600351 (2017). [2] G. Arregui, R. Cecil Ng, M. Albrechtsen, S. Stobbe, C. M. Sotomayor Torres, P. David García. Cavity optomechanics with Anderson-localized optical modes. Phys. Rev. Lett. 130, 043802 (2023). [3] G. Madiot, R. C Ng, G. Arregui, O. Florez, M. Albrechtsen, S. Stobbe, P. D Garcia, C. M Sotomayor- Torres. Optomechanical generation of coherent GHz vibrations in a phononic waveguide. Phys. Rev. Lett. 130, 106903 (2023). [4] O. Florez, G. Arregui, M. Albrechtsen, R. C. Ng, J. Gomis-Bresco, S. Stobbe, C. M. Sotomayor-Torres, P. David García. Engineering nanoscale hypersonic phonon transport. Nature Nanotechnology 17, 947 (2022). [5] G Arregui, D Navarro-Urrios, N Kehagias, CMS Torres, PD Garcia. All-optical radio-frequency modulation of Anderson-localized modes. Physical Review B 98 (18), 180202 (2018).