Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optomechanical properties of GaAs/AlAs micropillar resonators operating
  in the 18 GHz range   Recent experiments demonstrated that GaAs-AlAs based micropillar cavities are
promising systems for quantum optomechanics, allowing the simultaneous
three-dimensional confinement of near-infrared photons and acoustic phonons in
the 18-100 GHz range. Here, we investigate through numerical simulations the
optomechanical properties of this new platform. We evidence how the Poisson's
ratio and semiconductor-vacuum boundary conditions lead to very distinct
features in the mechanical and optical three dimensional confinement. We find a
strong dependence of the mechanical quality factor and strain distribution on
the micropillar radius, in great contrast to what is predicted and observed in
the optical domain. The derived optomechanical coupling constants g_0 reach
ultra-large values in the 10^6 rad/s range.

28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ