Elimination of the background from polariton CARS spectra by spatial separation of the exciting and probe beams
A method for elimination of the background (resulting from direct four-photon processes) from polariton CARS spectra is proposed and demonstrated experimentally. The method is based on the ability of polaritons to propagate in a medium over macroscopic distances and it requires a geometry of the int...
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Veröffentlicht in: | Quantum electronics (Woodbury, N.Y.) N.Y.), 1998-02, Vol.28 (2), p.167-168 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A method for elimination of the background (resulting from direct four-photon processes) from polariton CARS spectra is proposed and demonstrated experimentally. The method is based on the ability of polaritons to propagate in a medium over macroscopic distances and it requires a geometry of the interacting waves in which the regions of biharmonic excitation of polaritons and probing of the excited polaritons by a probe field are spatially separated in a crystal. (nonlinear optical phenomena and devices) |
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ISSN: | 1063-7818 1468-4799 |
DOI: | 10.1070/QE1998v028n02ABEH001149 |