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Title: A micropillar for cavity optomechanics

Abstract

Demonstrating the quantum ground state of a macroscopic mechanical object is a major experimental challenge in physics, at the origin of the rapid emergence of cavity optomechanics. We have developed a new generation of optomechanical devices, based on a microgram quartz micropillar with a very high mechanical quality factor. The structure is used as end mirror in a Fabry-Perot cavity with a high optical finesse, leading to ultra-sensitive interferometric measurement of the resonator displacement. We expect to reach the ground state of this optomechanical resonator by combining cryogenic cooling in a dilution fridge at 30 mK and radiation-pressure cooling. We have already carried out a quantum-limited measurement of the micropillar thermal noise at low temperature.

Authors:
; ; ; ; ;  [1];  [2]; ; ;  [3]; ; ;  [4]
  1. Laboratoire Kastler Brossel, UPMC-ENS-CNRS, Paris (France)
  2. Département de Physique, ENS, Paris (France)
  3. Département Mesures Physiques, ONERA, Châtillon (France)
  4. Laboratoire des Matériaux Avancés, IN2P3-CNRS, Lyon (France)
Publication Date:
OSTI Identifier:
22390722
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1633; Journal Issue: 1; Conference: 11. International Conference on Quantum Communication, Measurement and Computation, Vienna (Austria), 30 Jul - 3 Aug 2012; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CAVITY RESONATORS; COOLING; DILUTION; GROUND STATES; INTERFEROMETRY; MIRRORS; NOISE; QUALITY FACTOR; QUANTUM MECHANICS; QUARTZ; RADIATION PRESSURE

Citation Formats

Kuhn, Aurélien, Neuhaus, Leonhard, Deléglise, Samuel, Briant, Tristan, Cohadon, Pierre-François, Heidmann, Antoine, Van Brackel, Emmanuel, Chartier, Claude, Ducloux, Olivier, Le Traon, Olivier, Michel, Christophe, Pinard, Laurent, and Flaminio, Raffaele. A micropillar for cavity optomechanics. United States: N. p., 2014. Web. doi:10.1063/1.4903097.
Kuhn, Aurélien, Neuhaus, Leonhard, Deléglise, Samuel, Briant, Tristan, Cohadon, Pierre-François, Heidmann, Antoine, Van Brackel, Emmanuel, Chartier, Claude, Ducloux, Olivier, Le Traon, Olivier, Michel, Christophe, Pinard, Laurent, & Flaminio, Raffaele. A micropillar for cavity optomechanics. United States. doi:10.1063/1.4903097.
Kuhn, Aurélien, Neuhaus, Leonhard, Deléglise, Samuel, Briant, Tristan, Cohadon, Pierre-François, Heidmann, Antoine, Van Brackel, Emmanuel, Chartier, Claude, Ducloux, Olivier, Le Traon, Olivier, Michel, Christophe, Pinard, Laurent, and Flaminio, Raffaele. Thu . "A micropillar for cavity optomechanics". United States. doi:10.1063/1.4903097.
@article{osti_22390722,
title = {A micropillar for cavity optomechanics},
author = {Kuhn, Aurélien and Neuhaus, Leonhard and Deléglise, Samuel and Briant, Tristan and Cohadon, Pierre-François and Heidmann, Antoine and Van Brackel, Emmanuel and Chartier, Claude and Ducloux, Olivier and Le Traon, Olivier and Michel, Christophe and Pinard, Laurent and Flaminio, Raffaele},
abstractNote = {Demonstrating the quantum ground state of a macroscopic mechanical object is a major experimental challenge in physics, at the origin of the rapid emergence of cavity optomechanics. We have developed a new generation of optomechanical devices, based on a microgram quartz micropillar with a very high mechanical quality factor. The structure is used as end mirror in a Fabry-Perot cavity with a high optical finesse, leading to ultra-sensitive interferometric measurement of the resonator displacement. We expect to reach the ground state of this optomechanical resonator by combining cryogenic cooling in a dilution fridge at 30 mK and radiation-pressure cooling. We have already carried out a quantum-limited measurement of the micropillar thermal noise at low temperature.},
doi = {10.1063/1.4903097},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1633,
place = {United States},
year = {Thu Dec 04 00:00:00 EST 2014},
month = {Thu Dec 04 00:00:00 EST 2014}
}
  • We study Stokes and anti-Stokes processes in cavity optomechanics in the regime of strong coupling. The Stokes and anti-Stokes signals exhibit prominently the normal-mode splitting. We report gain for the Stokes signal. We also report lifetime splitting when the pump power is less than the critical power for normal-mode splitting. The nonlinear Stokes processes provide a useful method for studying the strong-coupling regime of cavity optomechanics. We also investigate the correlations between the Stokes and the anti-Stokes photons produced spontaneously by the optomechanical system. At zero temperature, our nanomechanical system leads to the correlations between the spontaneously generated photons exhibitingmore » photon antibunching and those violating the Cauchy-Schwartz inequality.« less
  • We investigate optomechanical coupling between one-dimensional interacting bosons and the electromagnetic field in a high-finesse optical cavity. We show that by tuning interatomic interactions, one can realize effective optomechanics with mechanical resonators ranging from side-mode excitations of a Bose-Einstein condensate (BEC) to particle-hole excitations of a Tonks-Girardeau (TG) gas. We propose that this unique feature can be formulated to detect the BEC-TG gas crossover and measure the sine-Gordon transition continuously and nondestructively.
  • We demonstrate a technique to tune the optical properties of micropillar cavities by creating small defects on the sample surface near the cavity region with an intense focused laser beam. Such defects modify strain in the structure, changing the birefringence in a controllable way. We apply the technique to make the fundamental cavity mode polarization-degenerate and to fine tune the overall mode frequencies, as needed for applications in quantum information science.
  • We perform frequency- and time-resolved all-optical switching of a GaAs-AlAs micropillar cavity using an ultrafast pump-probe setup. The switching is achieved by two-photon excitation of free carriers. We track the cavity resonances in time with a high frequency resolution. The pillar modes exhibit simultaneous frequency shifts, albeit with markedly different maximum switching amplitudes and relaxation dynamics. These differences stem from the non-uniformity of the free carrier density in the micropillar, and are well understood by taking into account the spatial distribution of injected free carriers, their spatial diffusion and surface recombination at micropillar sidewalls.
  • We demonstrate an ultrahigh-Q slotted two-dimensional photonic crystalcavity capable of obtaining strong interaction between the internal light field and the mechanical motion of the slotted structure. The measured optical quality factor is Q=1.2×10⁶ for a cavity with an effective modal volume of V eff=0.04(λ)³. Optical transduction of the thermal motion of the fundamental in-plane mechanical resonance of the structure(ν m=151 MHz) is performed, from which a zero-point motion optomechanical coupling rate of g*/2π=320 kHz is inferred. Dynamical back-action of the optical field on the mechanical motion, resulting in cooling and amplication of the mechanical motion, is also demonstrated.