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SUMMARY:New directions in nano-optomechanics
DTSTART:20170602T151500
DTSTAMP:20260916T062944Z
UID:e8e860245c11e155c3e04199c6810d490c743237bd34361ebf02be29
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Ivan Favero\, Matériaux et Phénomènes Quantiques\, Univ
 ersité Paris Diderot\, CNRS\, Paris\nThe interaction between light and me
 chanical motion is boosted in lightweight nanoscale resonators. After land
 mark optomechanics experiments realized on single resonators\, the investi
 gation of collective phenomena now requires controlling vast ensembles of 
 resonators\, coupled by light or vibrations. The evolution towards collect
 ive nano-optomechanics bears potential for a variety of sensing applicatio
 ns as well as for quantum or topological photonics. It is however impeded 
 by the disorder imposed by nanofabrication techniques\, which naturally de
 tunes high-Q resonators and precludes resonant interactions amongst them.\
 nHere we present a new technique to resonantly tune ensembles of nanophoto
 nic/mechanical resonators\, building on the recent experimental developmen
 t of nano-optomechanics in liquids [1]. Laser light injected into the opti
 cal mode of a resonator immersed in a fluid triggers an adjustable etching
  process\, leading to fine-tuning of the resonator dimensions with picomet
 er precision.\nThis process is naturally scalable to multiple resonators a
 nd has allowed us to resonantly tune small ensembles (2 to 5 units) [2]. A
 s a first application\, we explore the resonant optical interaction of mul
 tiple and distant nano-optomechanical systems. Light flowing unidirectiona
 lly along a (chiral) chain of nano-optomechanical oscillators is observed 
 to produce their frequency locking above a certain threshold\, a first exa
 mple of collective phenomenon in optomechanics [3]. Our experiments are ex
 plained by a minimal semi-classical model\, and set the grounds for more a
 dvanced quantum experiments.\n \n[1] Gil-Santos\, E.\, et al. High-freque
 ncy nano-optomechanical resonators in liquids\, Nature Nanotechnology 10\,
  810 (2015)\n[2] Gil-Santos\, E.\, et al. Scalable high-precision tuning o
 f photonic resonators by resonant cavity-enhanced photoelectrochemical etc
 hing\, Nature Communications 8\, 14267 (2017).\n[3] Gil-Santos\, E.\, et a
 l. Light-mediated cascaded locking of multiple nano-optomechanical oscilla
 tors\, Phys Rev Lett 118\, 063605 (2017).\n 
LOCATION:auditorium CE5
STATUS:CONFIRMED
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