Phase-matched frequency conversion in waveguides by means of transverse wavevector projections

We present a versatile technique for modal phase-matched second-harmonic generation in a waveguide, which relies on the incident electromagnetic field having transverse wavevector components on the input facet of the waveguide. Such a requirement is satisfied by using an angular-coupling arrangement...

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Bibliographic Details
Published in:Journal of the Optical Society of America. B, Optical physics Optical physics, 2020-04, Vol.37 (4), p.1140
Main Authors: Carnio, Brett N., Elezzabi, Abdulhakem Y.
Format: Article
Language:English
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Summary:We present a versatile technique for modal phase-matched second-harmonic generation in a waveguide, which relies on the incident electromagnetic field having transverse wavevector components on the input facet of the waveguide. Such a requirement is satisfied by using an angular-coupling arrangement, which allows for the excitation of modes having an odd spatial distribution that contribute to modal phase-matched second-harmonic generation. The strength of the second-harmonic signal is directly related to the angle at which the incident field is coupled into these modes. This is critical for on-chip nonlinear frequency conversion processes in the areas of optical communication, optical computing, and quantum computing.
ISSN:0740-3224
1520-8540
DOI:10.1364/JOSAB.384420