3 research outputs found
Optomechanically induced transparency in membrane-in-the-middle setup at room temperature
We demonstrate the analogue of electromagnetically induced transparency in a
room temperature cavity optomechanics setup formed by a thin semitransparent
membrane within a Fabry-P\'erot cavity. Due to destructive interference, a weak
probe field is completely reflected by the cavity when the pump beam is
resonant with the motional red sideband of the cavity. Under this condition we
infer a significant slowing down of light of hundreds of microseconds, which is
easily tuned by shifting the membrane along the cavity axis. We also observe
the associated phenomenon of electromagnetically induced amplification which
occurs due to constructive interference when the pump is resonant with the blue
sideband.Comment: 5 pages, 4 figure
Optomechanical sideband cooling of a thin membrane within a cavity
We present an experimental study of dynamical back-action cooling of the
fundamental vibrational mode of a thin semitransparent membrane placed within a
high-finesse optical cavity. We study how the radiation pressure interaction
modifies the mechanical response of the vibrational mode, and the experimental
results are in agreement with a Langevin equation description of the coupled
dynamics. The experiments are carried out in the resolved sideband regime, and
we have observed cooling by a factor 350 We have also observed the mechanical
frequency shift associated with the quadratic term in the expansion of the
cavity mode frequency versus the effective membrane position, which is
typically negligible in other cavity optomechanical devices.Comment: 15 pages, 7 figure
Tunable linear and quadratic optomechanical coupling for a tilted membrane within an optical cavity: theory and experiment
We present an experimental study of an optomechanical system formed by a
vibrating thin semi-transparent membrane within a high-finesse optical cavity.
We show that the coupling between the optical cavity modes and the vibrational
modes of the membrane can be tuned by varying the membrane position and
orientation. In particular we demonstrate a large quadratic dispersive
optomechanical coupling in correspondence with avoided crossings between
optical cavity modes weakly coupled by scattering at the membrane surface. The
experimental results are well explained by a first order perturbation treatment
of the cavity eigenmodes.Comment: 10 pages, 6 figure