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Narrow-Band Terahertz Pulse Generation in Lithium Niobate Crystal Using Phase Mask

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Journal of Contemporary Physics (Armenian Academy of Sciences) Aims and scope

Abstract

Below, we theoretically study the generation of narrowband terahertz (THz) radiation by optical rectification in an artificial periodically poled lithium niobate (LN) crystal with a wide aperture. The latter is formed by placing a multi-slit phase mask in front of a conventional (single-domain) LN crystal. It is shown that the bandwidth of THz generation can be varied over a wide range by changing the linear size of the pump beam in the crystal. In addition, it is possible to tune up the generation frequency in the range of 0.4–0.8 THz by building a mask image in the crystal with different magnifications. According to estimates, the energy of narrowband THz pulses at a frequency of 0.5 THz in a stoichiometric LN crystal at a temperature of 100 K is about 265 μJ for a pump pulse energy of 220 mJ.

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Funding

This work was supported by Ministry of Science and Higher Education of the Republic of Armenia (21T-1C265).

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Authors and Affiliations

  1. Yerevan State University, Yerevan, Armenia

    Y. H. Avetisyan & A. H. Makaryan

Authors
  1. Y. H. Avetisyan
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  2. A. H. Makaryan
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Correspondence to Y. H. Avetisyan.

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Translated by V. Musakhanyan

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Avetisyan, Y.H., Makaryan, A.H. Narrow-Band Terahertz Pulse Generation in Lithium Niobate Crystal Using Phase Mask. J. Contemp. Phys. 58, 362–368 (2023). https://doi.org/10.1134/S1068337223040047

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  • DOI: https://doi.org/10.1134/S1068337223040047

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