Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Violet emission from bulk Si prompted by surface plasmon polaritons   Silicon has been long known as a poor light emitter due to its indirect band
gap and strong phonon-assisted decay of the excited states. Nevertheless, we
have revealed efficient quasi-monochromatic photoluminescence at 368 nm from
bulk silicon in the near-violet spectral range of the interband transition
SiE{\Gamma}1 even at room temperature. Optical and electron spectroscopy
experiments showed a clear relation of the emission to a surface plasmon
polariton (SPP) located on the SiO/Si interface. The presented results
demonstrate that the unveiled luminescence is an effect of creation and decay
of the SPP being a mixture of the surface plasmon, light, and the bulk
interband transition. The SPP evolves in the silicon layer with a thickness of
the order of the near-violet wave penetration depth (~80 nm) and is
characterized by high excitation amplitude due to its hybrid nature. The effect
seems to be easily applicable in developing near-violet light sources based on
the existing Si-technology.

16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg