Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cryogenic operation of MEMS-based suspended high overtone bulk acoustic
  wave resonators for microwave to optical signal transduction   Suspended high-overtone bulk acoustic wave resonators (HBARs) can serve as a
viable optomechanical platform for efficient transduction of signals from the
microwave to the optical frequency domain. In contrast to 1D nanobeam
optomechanical crystals, HBARs benefit from very high RF to phonon injection
efficiency ($\eta_{PIE}\approx$1) and low optical pump induced heating at
cryogenic temperatures. By building small mode volume optical cavities around
these devices, one can in principle achieve optomechanical cooperativities
comparable to 1D nanobeam optomechanical crystals. In this work, we demonstrate
cryogenic operation ($\approx$10 K) of such suspended HBAR devices and show
classical signal modulation upto 3.5 GHz and response times $\approx$ 524 ns
(for the fundamental mode at 340 MHz). While the transduction efficiency is
currently limited by the material and device fabrication processes used in this
work, we show that with reasonable modifications, efficient quantum
transduction is within reach using this approach.

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The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an