Please use this identifier to cite or link to this item:
https://doi.org/10.1021/jp047787q
| Title: | Ultrafast and large third-order nonlinear optical properties of CdS nanocrystals in polymeric film | Authors: | He, J. Ji, W. Ma, G.H. Tang, S.H. Kong, E.S.W. Chow, S.Y. Zhang, X.H. Hua, Z.L. Shi, J.L. |
Issue Date: | 17-Mar-2005 | Citation: | He, J., Ji, W., Ma, G.H., Tang, S.H., Kong, E.S.W., Chow, S.Y., Zhang, X.H., Hua, Z.L., Shi, J.L. (2005-03-17). Ultrafast and large third-order nonlinear optical properties of CdS nanocrystals in polymeric film. Journal of Physical Chemistry B 109 (10) : 4373-4376. ScholarBank@NUS Repository. https://doi.org/10.1021/jp047787q | Abstract: | We 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. © 2005 American Chemical Society. | Source Title: | Journal of Physical Chemistry B | URI: | http://scholarbank.nus.edu.sg/handle/10635/98496 | ISSN: | 15206106 | DOI: | 10.1021/jp047787q |
| Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.