Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Localized frequency comb and formation of embedded solitons in
  silicon-based slot waveguides   We explore the possibility to excite the so-called embedded solitons in
specially designed slot waveguides based on silicon and silica or silicon
nanocrystals. This requires the excitation of the structure with quasi-TM
polarized pulses -- for which Raman effect is absent -- and at a specific
infrared wavelength for which only the second- and fourth-order group velocity
coefficients are non-vanishing. Pulses launched in these conditions will
generate a spectrally localized continuum, associated to a frequency comb
coming from the spectral interference of many embedded solitons.

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The categories of this paper are: supr-con
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an