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|Title:||Shape-dependent nonlinear absorption and relaxation in CuInS2 nanocrystals|
|Authors:||Venkatram, N. |
|Source:||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|
|Appears in Collections:||Staff Publications|
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