Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single Photon Detection by Cavity-Assisted All-Optical Gain   We consider the free carrier dispersion effect in a semiconductor nanocavity
in the limit of discrete photoexcited electron-hole pairs. This analysis
reveals the possibility of ultrafast, incoherent transduction and gain from a
single photon signal to a strong coherent probe field. Homodyne detection of
the displaced probe field enables a new method for room temperature,
photon-number-resolving single photon detection. In particular, we estimate
that a single photon absorbed within a silicon nanocavity can, within tens of
picoseconds, be detected with $\sim 99\%$ efficiency and a dark count rate on
the order of kHz assuming a mode volume $V_\text{eff}\sim
10^{-2}(\lambda/n_\text{Si})^3$ for a 4.5 micron probe wavelength and a loaded
quality factor $Q$ on the order of $10^4$.

10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph