Grating-induced slow-light enhancement of second harmonic generation in periodically poled crystals

Maybour, Thomas, Edward, Smith, Devin H and Horak, Peter (2022) Grating-induced slow-light enhancement of second harmonic generation in periodically poled crystals. Physical Review A, 105 (1), [013517]. (doi:10.1103/PhysRevA.105.013517).

Record type: Article

Abstract

The effect of slow light on second-harmonic generation in a periodically poled χ(2) nonlinear medium is investigated theoretically. A linear π phase-shifted grating is used to slow the group velocity of the fundamental frequency, and the resulting field enhancement greatly increases the second-harmonic conversion efficiency. A second linear grating at the input end ensures that all output is in the forward direction. We show that almost 100% conversion efficiency can be achieved for continuous wave pumping at low intensities that generate negligible conversion in the absence of the slow-light grating.

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210924 chi2_enh_paper_submitted - Accepted Manuscript

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Submitted date: 24 September 2021

Accepted/In Press date: 23 December 2021

Published date: 18 January 2022

Additional Information: Funding Information: The authors acknowledge funding through the UK National Quantum Technologies Programme (EPSRC Grants No. EP/T001062/1 and No. EP/M024539/1) and an EPSRC DTP Ph.D. studentship. We also acknowledge the use of the IRIDIS High Performance Computing Facility and associated support services at the University of Southampton, in the completion of this work. Publisher Copyright: © 2022 American Physical Society.

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