Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spontaneous emission of a nanoscopic emitter in a strongly scattering
  disordered medium   Fluorescence lifetimes of nitrogen-vacancy color centers in individual
diamond nanocrystals were measured at the interface between a glass substrate
and a strongly scattering medium. Comparison of the results with values
recorded from the same nanocrystals at the glass-air interface revealed
fluctuations of fluorescence lifetimes in the scattering medium. After
discussing a range of possible systematic effects, we attribute the observed
lengthening of the lifetimes to the reduction of the local density of states.
Our approach is very promising for exploring the strong three-dimensional
localization of light directly on the microscopic scale.

23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn