Terahertz-induced Kerr effect in amorphous chalcogenide glasses

Maksim Zalkovskij, Andrew Strikwerda, Krzysztof Iwaszczuk, A. Popescu, A. Savastru, Radu Malureanu, Andrei Lavrinenko, Peter Uhd Jepsen

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We have investigated the terahertz-induced third-order (Kerr) nonlinear optical properties of the amorphous chalcogenide glasses As2S3 and As2Se3. Chalcogenide glasses are known for their high optical Kerr nonlinearities which can be several hundred times greater than those of fused silica. We use high-intensity, single-cycle terahertz pulses with a maximum electrical field strength exceeding 400 kV/cm and frequency content from 0.2 to 3.0 THz. By optical Kerr-gate sampling, we measured the terahertz-induced nonlinear refractive indices at 800nm to be n2 = 1.746 x 10-14 cm2/W for As2S3 and n2 = 3.440 x 10-14 cm2/W for As2Se3.
Original languageEnglish
Article number221102
JournalApplied Physics Letters
Issue number22
Number of pages4
Publication statusPublished - 2013

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