Characterization of nonlinear optical parameters of copper‐ and silver‐doped silica glasses at <i>λ</i> = 1064 nm
R. A. GaneevNPO Akadempribor, Academy of Sciences of Uzbekistan, Akademgorodok, Tashkent 700125, UzbekistanA.I. RyasnyanskyNPO Akadempribor, Academy of Sciences of Uzbekistan, Akademgorodok, Tashkent 700125, UzbekistanА. Л. СтепановI. Physikalisches Institut, Aachen Technical University, 52056 Aachen, GermanyT. UsmanovNPO Akadempribor, Academy of Sciences of Uzbekistan, Akademgorodok, Tashkent 700125, Uzbekistan
ABI
Аннотация
Abstract Investigations of nonlinear optical characteristics (nonlinear refractive indices, nonlinear absorption coefficients and third‐order nonlinear susceptibilities) of copper and silver nanoparticles implanted in glasses are presented using picosecond Nd:YAG laser radiation ( λ = 1064 nm) and the Z ‐scan technique. The variations of the sign of the nonlinear refractive indices depending on matrix properties are analyzed. It is shown that the nonlinear absorption in copper‐doped glasses is due to the two‐photon effect. The optical limiting properties of these materials are discussed in the framework of two‐photon absorption. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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