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arXiv · 2411.19046

Noncollinear phase-matching of high harmonic generation in solids

Pavel Peterka·František Trojánek·Petr Malý·Martin Kozák
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Abstract

We propose and experimentally demonstrate a scheme allowing to reach noncollinear phase-matching of high harmonic generation in solids, which may potentially lead to an enhancement of the generation efficiency. The principle is based on high-order frequency mixing of two light waves with identical frequencies but different directions of wavevectors. In this process, $N$-th harmonic frequency is produced by frequency mixing of $N$+1 photons from a wave with high amplitude of electric field and a single photon from a wave with low field amplitude, which are propagating noncollinearly in an optically isotropic media. We experimentally verify the feasibility of this scheme by demonstrating phase-matched generation of third and fifth harmonic frequency in sapphire.

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Pavel Peterka, František Trojánek, Petr Malý, Martin Kozák. 2024-11-28. Noncollinear phase-matching of high harmonic generation in solids. https://doi.org/10.1063/5.0219911

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