Intra-pulse difference frequency generation in ZnGeP2 for high-frequency terahertz radiation generation

The highly-nonlinear chalcopyrite crystal family has experienced remarkable success as source crystals in the mid-infrared spectral range, such that these crystals are primary candidates for producing high terahertz frequency (i.e., ≳ 10 THz) electric fields. A phase-resolved terahertz electric fiel...

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Bibliographic Details
Published in:Scientific reports 2023-05, Vol.13 (1), p.8161-8161, Article 8161
Main Authors: Carnio, B. N., Zhang, M., Zawilski, K. T., Schunemann, P. G., Moutanabbir, O., Elezzabi, A. Y.
Format: Article
Language:English
Subjects:
639/624
639/624/399
639/624/400/385
Crystals
Electric fields
Electrons
Humanities and Social Sciences
multidisciplinary
Radiation
Science
Science (multidisciplinary)
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Summary:The highly-nonlinear chalcopyrite crystal family has experienced remarkable success as source crystals in the mid-infrared spectral range, such that these crystals are primary candidates for producing high terahertz frequency (i.e., ≳ 10 THz) electric fields. A phase-resolved terahertz electric field pulse is produced via intra-pulse difference frequency generation in a chalcopyrite (110) ZnGeP 2 crystal, with phase-matching being satisfied by the excitation electric field pulse having polarizations along both the ordinary and extraordinary crystal axes. While maximum spectral power is observed at the frequency of 24.5 THz (in agreement with intra-pulse phase-matching calculations), generation nonetheless occurs across the wide spectral range of 23–30 THz. To our knowledge, this is the first time a chalcopyrite ZnGeP 2 crystal has been used for the generation of phase-resolved high-frequency terahertz electric fields.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-35131-6