Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A vertically-loaded diamond microdisk resonator spin-photon interface   We propose and optimize a vertically-loaded diamond microdisk resonator
(VLDMoRt) coupled to a nitrogen-vacancy (NV) center in diamond for efficient
collection of zero-phonon-line emission into low numerical aperture
($\text{NA}$) free-space modes. The VLDMoRt achieves a Purcell enhancement of
172 with $39\%$ of the emitted light collected within a $\text{NA}$ of 0.6,
leading to a total external spin-photon collection efficiency of 0.33. As the
design is compatible with established nanofabrication techniques and couples to
low-NA modes accessible by cryogenic free-space optical systems, it is a
promising platform for efficient spin-photon interfaces based on diamond
quantum emitters.

21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin