Ultrafast and Large Third-order Nonlinear Optical Properties of CdS Nanocrystals in Polymeric Film

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dc.creatorHe, J.
dc.creatorJi, W.
dc.creatorMa, G. H.
dc.creatorTang, S. H.
dc.creatorKong, E. S. W.
dc.creatorChow, S. Y.
dc.creatorZhang, X. H.
dc.creatorHua, Z. L.
dc.creatorShi, J. L.
dc.date2005-07-28
dc.date.accessioned2026-07-07T03:06:08Z
dc.date.available2026-07-07T03:06:08Z
dc.descriptionWe report the ultrafast and large third-order nonlinear optical properties of CdS nanocrystals (NCs) embedded in a polymeric film. The CdS NCs of 2-nm radius are synthesized by an ion exchange method and highly concentrated in the two layers near the surfaces of the polymeric film. The two-photon absorption coefficient and the optical Kerr coefficient are measured with laser pulses of 250-fs duration at 800-nm wavelength. The one-photon and two-photon figures of merit are determined to be 3.1 and 1.3, respectively, at irradiance of 2 GW/cm2. The observed nonlinearities have a recovery time of ~ 1 ps. The two-photon-generated free carrier effects have also been observed and discussed. These results demonstrate that CdS NCs embedded in polymeric film are a promising candidate for optical switching applications.
dc.description18 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0507668
dc.identifierhttp://arxiv.org/abs/cond-mat/0507668
dc.identifierJ. Phys. Chem. B 109, 4373 (2005)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/26702
dc.subjectMaterials Science
dc.titleUltrafast and Large Third-order Nonlinear Optical Properties of CdS Nanocrystals in Polymeric Film
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