Nonlinear self-focusing and absorption effects were investigated in nanostructured SnO2:SiO2 by means of z-scan techniques. The results show electronic nonlinearity with the real part of the cubic susceptibility ranging between 0.5 and 2.3x10(-20) m(2)/V-2. Nonlinear dissipative effects appear to be caused by two-photon absorption involving localized states at the cluster interfaces, controlled by oxygen nonstoichiometry. As a result, synthesis can be optimized to give a wide-band-gap semiconductor-doped glass with good figure of merit for nonlinear directional couplers. (C) 2004 American Institute of Physics.
Clementi, A., Chiodini, N., Paleari, A. (2004). Cubic optical nonlinearity in nanostructured SnO2:SiO2. APPLIED PHYSICS LETTERS, 84(6), 960-962 [10.1063/1.1645664].
Cubic optical nonlinearity in nanostructured SnO2:SiO2
CHIODINI, NORBERTO;PALEARI, ALBERTO MARIA FELICE
2004
Abstract
Nonlinear self-focusing and absorption effects were investigated in nanostructured SnO2:SiO2 by means of z-scan techniques. The results show electronic nonlinearity with the real part of the cubic susceptibility ranging between 0.5 and 2.3x10(-20) m(2)/V-2. Nonlinear dissipative effects appear to be caused by two-photon absorption involving localized states at the cluster interfaces, controlled by oxygen nonstoichiometry. As a result, synthesis can be optimized to give a wide-band-gap semiconductor-doped glass with good figure of merit for nonlinear directional couplers. (C) 2004 American Institute of Physics.
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