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https://doi.org/10.1063/1.3266518
Title: | Shape-dependent nonlinear absorption and relaxation in CuInS2 nanocrystals |
Authors: | Venkatram, N. Batabyal, S.K. Tian, L. Vittal, J.J. Ji, W. |
Issue Date: | 2009 |
Citation: | Venkatram, N., Batabyal, S.K., Tian, L., Vittal, J.J., Ji, W. (2009). Shape-dependent nonlinear absorption and relaxation in CuInS2 nanocrystals. Applied Physics Letters 95 (20) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3266518 |
Abstract: | We report the observation of nonlinear-optical response and relaxation in copper indium sulfide (CuInS2) crystalline nanoparticles and nanorods with femtosecond Z-scans and transient absorption measurements. Dependent on the size and shape, two-photon absorption and saturation in the one-photon absorption manifest themselves in these measurements as laser excitation wavelength of 780 nm is in the proximity of the lowest-lying excitonic energy, particularly for the nanorods. The transient absorption measurements by both one-photon and two-photon excitation reveal that electron-hole recombination is faster in smaller nanoparticles, or in nanorods with smaller aspect ratio. However, the decay to trapping states is independent of the size and aspect-ratio. © 2009 American Institute of Physics. |
Source Title: | Applied Physics Letters |
URI: | http://scholarbank.nus.edu.sg/handle/10635/94801 |
ISSN: | 00036951 |
DOI: | 10.1063/1.3266518 |
Appears in Collections: | Staff Publications |
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