Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cavity piezooptomechanics: piezoelectrically excited, optically
  transduced optomechanical resonators   We present a monolithic integrated aluminum nitride (AlN) optomechanical
resonator in which the mechanical motion is actuated by piezoelectric force and
the displacement is transduced by a high-Q optical cavity. The AlN
optomechanical resonator is excited from a radio-frequency electrode via a
small air gap to eliminate resonator-to-electrode loss. We observe the
electrically excited mechanical motion at 47.3 MHz, 1.04 GHz, and 3.12 GHz,
corresponding to the 1st, 2nd, and 4th radial-contour mode of the wheel
resonator respectively. An equivalent circuit model is developed to describe
the observed Fano-like resonance spectrum.

34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org