Spontaneous parametric down conversion in a doubly resonant one-dimensional photonic crystal

We study spontaneous parametric down conversion (SPDC) in a one-dimensional photonic crystal designed to operate in a doubly resonant configuration, where the frequencies of the pump and the generated photons are both tuned to band-edge resonances. We investigate the spectral correlations of the gen...

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Bibliographic Details
Published in:Optics letters 2020-03, Vol.45 (5), p.1244-1247
Main Authors: Introini, Viola, Steel, M J, Sipe, J E, Helt, L G, Liscidini, Marco
Format: Article
Language:English
Subjects:
Continuous radiation
Conversion
Photonic crystals
Photons
Second harmonic generation
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Summary:We study spontaneous parametric down conversion (SPDC) in a one-dimensional photonic crystal designed to operate in a doubly resonant configuration, where the frequencies of the pump and the generated photons are both tuned to band-edge resonances. We investigate the spectral correlations of the generated photons as a function of the spectral width of the pump, and demonstrate that the SPDC generation rate can scale with the fifth power of the structure length in the limit of a quasi-continuous-wave pump. We show that such an unusual scaling can be simply connected with the scaling of second-harmonic generation in the same structure, illustrating the general link between spontaneous and stimulated parametric nonlinear processes.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.385741