We report the lifetime enhancement of light-induced refractive index grating by applying a
bias field during writing. In comparison with the lifetime of about 10 hours of the …

We have observed dark decay rates in BaTiO_3 crystals at elevated temperatures that
correspond to dark decay times as long as 2200 years at room temperature. Our …

Interaction of divalent metal acetylacetonates, M (acac) 2, M= Mg, Co, with titanium
methoxide, Ti (OMe) 4, in 1: 1 ratio in toluene provides with practically quantitative yield a …

The recent electron magnetic resonance studies (EMR) studies [Decker, Phys. Rev. B 66,
174103 (2002)] of Fe 3+ ions in Ba Ti O 3 indicate a pronounced discrepancy concerning …

We analytically determine that the backward-error-propagation learning algorithm has a well-
defined region of convergence in neural learning-parameter space for two classes of …

A compact photorefractive optical novelty filter is presented. Its two main components, the
nonlinear photorefractive crystal and the spatial light modulator, are characterized. It is …

The photorefractive properties of BaTiO 3 are gradually modified by the addition of Nb which
change the charge carrier from hole to electron. Before the compensation point, the dark …

Transition metal chalcogenide nanomaterials are a significant class of functional materials
that find applications in the fields of catalysis, sensors, high-temperature superconductors …

Anomalous diffraction behavior is observed, for the first time to our knowledge, in doped
KNSBN crystals. The space-charge field increases to its maximum value and then gradually …

The photocurrent dark decay in photorefractive materials is theoretically analyzed by using
two different dynamical approaches-namely, the shallow traps and electron-hole transport …