Strong thermal optical nonlinearity caused by CdSe nanoparticles synthesised in smectic ionic liquid crystal
| Autor: | Gertruda V. Klimusheva, A. Lyashchova, Yuriy Garbovskiy, D. Fedorenko, V. Asaula, T. A. Mirnaya |
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| Rok vydání: | 2013 |
| Předmět: |
Nanocomposite
Materials science Absorption spectroscopy business.industry Physics::Optics General Chemistry Condensed Matter Physics Thermotropic crystal Condensed Matter::Soft Condensed Matter Crystal Condensed Matter::Materials Science Optics Chemical engineering Liquid crystal Phase (matter) General Materials Science Z-scan technique Absorption (chemistry) business |
| Zdroj: | Liquid Crystals. 40:1377-1382 |
| ISSN: | 1366-5855 0267-8292 |
| DOI: | 10.1080/02678292.2013.811548 |
| Popis: | Spectral and nonlinear optical properties of cadmium octanoate composites containing CdSe nanoparticles (NPs) have been studied by using optical absorption spectroscopy and laser scanning technique (Z-scan). CdSe NPs are chemically synthesised in thermotropic ionic liquid crystal (ILC) phase of cadmium octanoate which is used as nanoreactor. Anisotropic glassy nanocomposites are obtained by the rapid cooling of the ILC phase of nanocomposites to room temperature. The sizes of the CdSe NPs are determined from the absorption spectra. The thermo-optical nonlinearity of the new nanocomposites is characterised by extremely large value of the nonlinear refractive index, n2, under relatively low-powered CW laser irradiation. This nonlinearity is caused by (1) the efficient light-induced heating due to the CdSe NPs strong exciton absorption, and (2) consequent thermal dissipation, which in turn, produces the photoelastic tensions in the glassy smectic matrix. |
| Databáze: | OpenAIRE |
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