Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Excess quantum noise due to mode nonorthogonality in dielectric
  microresonators   This work presents a theory of the frequency-resolved light emission of
active two-dimensional dielectric microresonators, which are characterized by a
highly non-paraxial mode structure and frequently feature a position-dependent
dielectric constant and non-uniform gain. The Lorentzian intensity profile is
characterized by an appropriately generalized Petermann factor, a renormalized
peak position, and the cold-cavity resonance lifetime Gamma. The theory also
delivers a relation of Gamma to the laser threshold that improves earlier
phenomenological expressions even for the case of a homogeneous medium.

15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con