K. Kuznetsov, A. Leontyev, T. Novikova, A. A. Gaysarov, V. Sultanov, A. Rudyak, G. Kitaeva
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Preparation of the Quantum Correlated Optical-Terahertz Biphotons
We study the conditions necessary for generating non-classical optical-terahertz biphotons by means of spontaneous parametric down-conversion. Using a hot electron bolometer we demonstrate detection of the THz-frequency idler waves generated under parametric up- and down-conversion with a record low gain. Complete disappearance of the classical contribution has been observed at low temperatures. A second-order biphoton correlation function is analyzed.
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