Optical modulation of coherent phonon emission in optomechanical cavities
Maire, Jeremie (Institut Català de Nanociència i Nanotecnologia)
Arregui Bravo, Guillermo (Institut Català de Nanociència i Nanotecnologia)
Capuj, Nestor Eduardo (Universidad de La Laguna)
Colombano Sosa, Martin (Institut Català de Nanociència i Nanotecnologia)
Griol, Amadeu (Universidad Politécnica de Madrid)
Martínez, Alejandro (Universidad Politécnica de Madrid)
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia)
Navarro Urrios, Daniel (Universitat de Barcelona. Departament d'Electrònica)

Data:	2018
Resum:	Optomechanical (OM) structures are well suited to study photon-phonon interactions, and they also turn out to be potential building blocks for phononic circuits and quantum computing. In phononic circuits, in which information is carried and processed by phonons, OM structures could be used as interfaces to photons and electrons thanks to their excellent coupling efficiency. Among the components required for phononic circuits, such structures could be used to create coherent phonon sources and detectors, but more complex functions remain challenging. Here, we propose and demonstrate a way to modulate the coherent phonon emission from OM crystals by a photothermal effect induced by an external laser, effectively creating a phonon switch working at ambient conditions of pressure and temperature and the working speed of which is only limited by the build-up time of the mechanical motion of the OM structure. We additionally demonstrate two other modulation schemes: modulation of harmonics in which the mechanical mode remains active but different harmonics of the optical force are used, and modulation to and from a chaotic regime. Furthermore, due to the local nature of the photothermal effect used here, we expect this method to allow us to selectively modulate the emission of any single cavity on a chip without affecting its surroundings in the absence of mechanical coupling between the structures, which is an important step toward freely controllable networks of OM phonon emitters.
Ajuts:	European Commission 713450 Ministerio de Economía y Competitividad FIS2015-70862-P Ministerio de Economía y Competitividad SEV-2013-0295 Ministerio de Economía y Competitividad RYC-2014-15392
Drets:	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.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Controllable network ; Coupling efficiency ; Mechanical coupling ; Optomechanical cavities ; Photon-phonon interaction ; Photothermal effects ; Potential building blocks ; Pressure and temperature
Publicat a:	APL Photonics, Vol. 3, Issue 12 (December 2018) , art. 126102, ISSN 2378-0967

DOI: 10.1063/1.5040061

12 p, 3.3 MB

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