Long dark decay in highly sensitive Ce doped photorefractive KNbO3 crystals
We show that cerium doped KNbO 3 crystals exhibit high photorefractive sensitivities of S 1=
25× 10-11 m 3 J-1 and S 2= 78× 10-9 m 2 J-1 at 488 nm. The grating build-up time at a …
25× 10-11 m 3 J-1 and S 2= 78× 10-9 m 2 J-1 at 488 nm. The grating build-up time at a …
High photorefractive sensitivity at 860 nm in reduced rhodium-doped KNbO3
We show that high-temperature reduction in a CO–CO_2 atmosphere increases the
photorefractive sensitivity of KNbO_3: Rh at 860?? nm by 4 orders of magnitude compared …
photorefractive sensitivity of KNbO_3: Rh at 860?? nm by 4 orders of magnitude compared …
Infrared photorefractive effect in doped KNbO3 crystals
The photorefractive sensitivity of potassium niobate crystals doped with Ce, Co, Cu, Fe, Mn,
Ni, and Rh and double-doped with Mn and Rh is investigated over an extended spectral …
Ni, and Rh and double-doped with Mn and Rh is investigated over an extended spectral …
Submillisecond photorefractive response time of KNbO_3: Rb^+
Y Zhang, D Shen, X Ma, S Campbell, P Yeh, J Chen - Optics letters, 1994 - opg.optica.org
We investigate the photorefractive response time of diffraction gratings in Rb^+-doped
KNbO_3 crystals. Two components of charge carriers, with different response times, are …
KNbO_3 crystals. Two components of charge carriers, with different response times, are …
Interband photorefractive effects in KNbO3 induced by ultraviolet illumination
A novel mechanism is used to record photorefractive gratings in dielectric crystals. The
photon energy of near-ultraviolet recording beams is larger than the energy gap, and the …
photon energy of near-ultraviolet recording beams is larger than the energy gap, and the …
Optimization of the photorefractive properties of KNbO3 crystals
C Medrano, E Voit, P Amrhein, P Günter - Journal of applied physics, 1988 - pubs.aip.org
Photorefractive effects of nominally pure and iron‐doped KNbO3 crystals with
concentrations between 150 and 300 ppm have been investigated. In order to optimize the …
concentrations between 150 and 300 ppm have been investigated. In order to optimize the …
Fast photorefractive response in strongly reduced near-stoichiometric LiNbO3 crystals
The photorefractive response time of LiNbO_3 crystal is of the order of minutes, and such a
long response time limits the crystal's practical applications. We report the photorefractive …
long response time limits the crystal's practical applications. We report the photorefractive …
Multiple photorefractive gratings in ce-doped LiNbO3 and KNbO3 crystals
The dynamics of the build-up and the dark decay of photorefractive gratings written in
LiNbO3: Ce (1%) at room temperature and in undoped KNbO3 crystals heated above 70° C …
LiNbO3: Ce (1%) at room temperature and in undoped KNbO3 crystals heated above 70° C …
Electron-hole competition in photorefractive Rb doped KNbO3
ZG Zhang, Y Ding, HJ Eichler, P Fu, DZ Shen… - Optics …, 1997 - Elsevier
We report electron-hole competition in a two-beam coupling experiment in a KNbO3: Rb
crystal. We found simultaneous hole and electron conduction in different crystal areas. The …
crystal. We found simultaneous hole and electron conduction in different crystal areas. The …
Optimization of the photorefractive properties of KNbO3 crystals
C Medrano, E Voit, P Amrhein, P Günter - Ferroelectrics, 1989 - Taylor & Francis
Photorefractive effects of pure and iron doped KNbO3 crystals with concentrations between
150 ppm and 300 ppm have been investigated. In order to optimize the photorefractive …
150 ppm and 300 ppm have been investigated. In order to optimize the photorefractive …