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UV-induced Nonlinear Absorption in Lanthanum Calcium Borate Single Crystals

UV-induced Nonlinear Absorption in Lanthanum Calcium Borate Single Crystals

I V Kityk, A Majchrowski, E Michalski, D Kasprowicz, M Drozdowski, J Kisielewski, T Lukasiewicz, B Sahraoui

J Phys Chem B. 2006 May 11;110(18):9090-4.

PMID: 16671719

Abstract:

It has been revealed that lanthanum calcium borate (La2CaB10O19) crystals show two-photon absorption (TPA) induced by a UV laser field. UV-induced TPA measurements were performed in the spectral range of 475-1130 nm using as fundamental beam the third harmonics of the 28 ps Nd-YAG pulsed laser as a pumping beam for LiB3O5 optical parametrized generator using Z-scan method. Investigations performed by the Z-scan method were done during illumination by a Xe-F laser (lambda = 217 nm) as a photoinducing (pumping) beam. The pumping laser beam created a thin surface layer (about 80-90 nm) that was the source of the observed photoinduced TPA. The highest values of the TPA beta coefficients were achieved for polarization of the pumping light directed along the second-order crystallographic axis of the investigated crystals. The obtained values of the TPA coefficients were higher than those for the BiB3O6 crystals investigated earlier by us.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP223441290	Lanthanum calcium borate		223441-29-0	Price

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