Cascaded Stimulated Polariton Scattering in a single pass KTP crystal under picosecond pumpingстатья
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Дата последнего поиска статьи во внешних источниках: 15 февраля 2024 г.
Аннотация:Cascaded Stimulated Polariton Scattering (SPS) under powerful picosecond pumping of 532 nm wavelength was investigated at a single pass of KTP crystal. Under ordinary polarization of the pump wave (relatively XOZ-plane) parametric scattering in the KTP crystal was observed. By rotation of the pump wave polarization (from ordinary to extraordinary) this scattering gradually transforms into polariton scattering. Polariton signal components (spots) with gaps between them were registered at external angles of ~20 between the neighboring spots. Five polariton signal components were detected above the pump beam with frequency difference between neighboring cascaded components of ~188 cm-1 (5.64 THz).. The task was set to generate the sequence of cas-caded polariton components with the angle between each next component and the pump beam increasing regularly