Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics of a micro-VCSEL operated in the threshold region under
  low-level optical feedback   Semiconductor lasers are notoriously sensitive to optical feedback, and their
dynamics and coherence can be significantly modified through optical
reinjection. We concentrate on the dynamical properties of a very small (i.e.,
microscale) Vertical Cavity Surface Emitting Laser (VCSEL) operated in the low
coherence region between the emission of (partially) coherent pulses and ending
below the accepted macroscopic lasing threshold, with the double objective of:
1. studying the feedback influence in a regime of very low energy consumption;
2. using the micro-VCSEL as a surrogate for nanolasers, where measurements can
only be based on photon statistics. The experimental investigation is based on
time traces and radiofrequency spectra (common for macroscale devices) and
correlation functions (required at the nanoscale). Comparison of these results
confirms the ability of correlation functions to satisfactorily characterize
the action of feedback on the laser dynamics. Numerical predictions obtained
from a previously developed, fully stochastic modeling technique provide very
close agreement with the experimental observations, thus supporting the
possible extension of our observations to the nanoscale.

15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom