Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coaxial GaAs/(In,Ga)As dot-in-a-well nanowire heterostructures for
  electrically driven infrared light generation on Si in the telecommunication
  O band   Core-shell GaAs-based nanowires monolithically integrated on Si constitute a
promising class of nanostructures that could enable light emitters for fast
inter- and intrachip optical connections. We introduce and fabricate a novel
coaxial GaAs/(In,Ga)As dot-in-a-well nanowire heterostructure to reach
spontaneous emission in the Si transparent region, which is crucial for
applications in Si photonics. Specifically, we achieve room temperature
emission at 1.27 $\mu$m in the telecommunication O band. The presence of
quantum dots in the heterostructure is evidenced by a structural analysis based
on scanning transmission electron microscopy. The spontaneous emission of these
nanowire structures is investigated by cathodoluminescence and
photoluminescence spectroscopy. Thermal redistribution of charge carriers to
larger quantum dots explains the long wavelength emission achieved at room
temperature. Finally, in order to demonstrate the feasibility of the presented
nanowire heterostructures as electrically driven light emitters monolithically
integrated on Si, a light emitting diode is fabricated exhibiting
room-temperature electroluminescence at 1.26 $\mu$m.

15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
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The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg