Media type: E-Article Title: Generation of Optical—Terahertz Biphotons and Detection of Their Terahertz Component under Frequency-Nondegenerate Parametric Down-Conversion Contributor: Sultanov, V. D.; Kuznetsov, K. A.; Leontyev, A. A.; Kitaeva, G. Kh. imprint: Pleiades Publishing Ltd, 2020 Published in: JETP Letters Language: English DOI: 10.1134/s0021364020170099 ISSN: 0021-3640; 1090-6487 Origination: Footnote: