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Scheme of the Fresnel phase matching configuration.
(a) Conversion efficiency as a function of the zigzag path length (in terms of coherence lengths ). (b) Illustration of the fractional quasi-phase-matching (QPM). The half-order QPM case is highlighted.
The conversion efficiency as a function of the number of bounces . The half-order QPM is efficient enough to compensate for the reflectivity losses , as compared to the first-order QPM.
(a) Case of second-harmonic conversion from a wave: of condition (4) as a function of the reflection angle and the plate thickness . (b) Illustration of the phase considerations for in a GaAs plate, in the case where both the waveguiding and the Fresnel phase matching conditions are matched.
Spectral tunability of a single GaAs sample (thickness estimated from Fig. 4) as a function of the total reflection angle.
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