48 research outputs found
Light-matter interactions in multi-element resonators
We investigate structural resonances in multi-element optical resonators and
provide a roadmap for the description of the interaction of single extended
cavity modes with quantum emitters or mechanical resonators. Using a first
principle approach based on the transfer matrix formalism we analyze, both
numerically and analytically, the static and dynamical properties of three- and
four-mirror cavities. We investigate in particular conditions under which the
confinement of the field in specific subcavities allows for enhanced
light-matter interactions in the context of cavity quantum electrodynamics and
cavity optomechanics
Strong coupling and long-range collective interactions in optomechanical arrays
We investigate the collective optomechanics of an ensemble of scatterers
inside a Fabry-Perot resonator and identify an optimized configuration where
the ensemble is transmissive, in contrast with the usual reflective
optomechanics approach. In this configuration, the optomechanical coupling of a
specific collective mechanical mode can be several orders of magnitude larger
than the single-element case, and long-range interactions can be generated
between the different elements since light permeates throughout the array. This
new regime should realistically allow for achieving strong single-photon
optomechanical coupling with massive resonators, realizing hybrid quantum
interfaces, and exploiting collective long-range interactions in arrays of
atoms or mechanical oscillators.Comment: 11 pages, 12 figure
Cavity optomechanics with arrays of thick dielectric membranes
Optomechanical arrays made of structured flexible dielectrics are a promising
system for exploring quantum and many-body optomechanical phenomena. We
generalize investigations of the optomechanical properties of periodic arrays
of one-dimensional scatterers in optical resonators to the case of vibrating
membranes whose thickness is not necessarily small with respect to the optical
wavelength of interest. The array optical transmission spectrum and its
optomechanical coupling with a linear Fabry-Perot cavity field are investigated
both analytically and numerically.Comment: 7 pages, 6 figure
Enhanced optomechanical readout using optical coalescence
We present a scheme to strongly enhance the readout sensitivity of the
squared displacement of a mobile scatterer placed in a Fabry-P\'erot cavity. We
investigate the largely unexplored regime of cavity electrodynamics in which a
highly reflective element positioned between the end mirrors of a symmetric
Fabry-P\'erot resonator strongly modifies the cavity response function, such
that two longitudinal modes with different spatial parity are brought close to
frequency degeneracy and interfere in the cavity output field. In the case of a
movable middle reflector we show that the interference in this generic "optical
coalescence" phenomenon gives rise to an enhanced frequency shift of the peaks
of the cavity transmission that can be exploited in optomechanics.Comment: 5 pages, 3 figure