Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Anderson-localized random nanolaser   Precision is a virtue throughout science in general and in optics in
particular where carefully fabricated nanometer-scale devices hold great
promise for both classical and quantum photonics [1-6]. In such nanostructures,
unavoidable imperfections often impose severe performance limits but, in
certain cases, disorder may enable new functionalities [7]. Here we demonstrate
on-chip random nanolasers where the cavity feedback is provided by the
intrinsic disorder in a semiconductor photonic-crystal waveguide, leading to
Anderson localization of light [8]. This enables highly efficient and broadband
tunable lasers with very small mode volumes. We observe an intriguing interplay
between gain, dispersion-controlled slow light, and disorder, which determines
the cross-over from ballistic transport to Anderson localization. Such a
behavior is a unique feature of non-conservative random media that enables the
demonstration of all-optical control of random lasing. Our statistical analysis
shows a way towards ultimate thresholdless random nanolasers.

32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph