title: 2D photonic-crystal optomechanical nanoresonator.
abstract: We present the optical optimization of an optomechanical device based on a suspended InP membrane patterned with a 2D near-wavelength grating (NWG) based on a 2D photonic-crystal geometry. We first identify by numerical simulation a set of geometrical parameters providing a reflectivity higher than 99.8% over a 50-nm span. We then study the limitations induced by the finite value of the optical waist and lateral size of the NWG pattern using different numerical approaches. The NWG grating, pierced in a suspended InP 265-nm thick membrane, is used to form a compact microcavity involving the suspended nanomembrane as an end mirror. The resulting cavity has a waist size smaller than 10 μm and a finesse in the 200 range. It is used to probe the Brownian motion of the mechanical modes of the nanomembrane.
authors: K
authors: K
authors: Makles
authors: T
authors: T
authors: Antoni
authors: A G
authors: AG
authors: Kuhn
authors: S
authors: S
authors: Deléglise
authors: T
authors: T
authors: Briant
authors: P-F
authors: PF
authors: Cohadon
authors: R
authors: R
authors: Braive
authors: G
authors: G
authors: Beaudoin
authors: L
authors: L
authors: Pinard
authors: C
authors: C
authors: Michel
authors: V
authors: V
authors: Dolique
authors: R
authors: R
authors: Flaminio
authors: G
authors: G
authors: Cagnoli
authors: I
authors: I
authors: Robert-Philip
authors: A
authors: A
authors: Heidmann