Journal
OPTICS EXPRESS
Volume 28, Issue 23, Pages 34320-34327Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.405748
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Funding
- Nemzeti Kutatasi Fejlesztesi es Innovacios Hivatal [125808, 129134, 2018-1.2.1-NKP-201800010]
- European Social Fund [EFOP-3.6.1-16-2016-00004]
- Magyar Tudomanyos Akademia (Janos Bolyai Research Scholarship)
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A new type of THz source, working in reflection geometry, is proposed, where the pulse-front-tilt is introduced by a periodically micro-structured metal profile. For optical coupling, high refractive index nanocomposite fluid is used between the nonlinear optical material and the structured metal surface. Numerical simulations predict similar to 87 and similar to 85% optimized diffraction efficiencies for lithium niobate and lithium tantalate at 1030 and 800 nm pump wavelengths. The largest diffraction efficiencies can be achieved for a larger refractive index of the nanocomposite fluid than the index of the nonlinear material, for both cases. THz generation efficiencies of similar to 3 and similar to 1% are predicted for lithium niobate and lithium tantalate, respectively. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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