First hyperpolarizability of CdS nanoparticles studied by hyper-Rayleigh scattering

First hyperpolarizability of CdS nanoparticles studied by hyper-Rayleigh scattering

The first hyperpolarizability of nanocrystalline CdS particles (mean diameters of 2.0, 5.6 and 9.1 nm) was measured by the hyper-Rayleigh scattering technique. The results show that the first hyperpolarizability per CdS pair increases with decreasing particle size. This is ascribed to quantum confin...

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Veröffentlicht in:Optics communications 2000-05, Vol.178 (1), p.187-192
Hauptverfasser: Santos, B.S., Pereira, G.A.L., Petrov, D.V., de Mello Donegá, C.
Format: Artikel
Sprache:eng
Schlagworte:
Exact sciences and technology
First hyperpolarizability
Fundamental areas of phenomenology (including applications)
Hyper-Rayleigh scattering
Nonlinear optics
Optical susceptibility, hyperpolarizability
Optics
Physics
Semiconductor nanocrystals
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Zusammenfassung:The first hyperpolarizability of nanocrystalline CdS particles (mean diameters of 2.0, 5.6 and 9.1 nm) was measured by the hyper-Rayleigh scattering technique. The results show that the first hyperpolarizability per CdS pair increases with decreasing particle size. This is ascribed to quantum confinement effects on the oscillator strengths. These effects lead to an enhancement by one order of magnitude in the first hyperpolarizability of 2 nm CdS particles, in comparison with bulk CdS.
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(00)00614-3