A sensitive photoinduced current transient spectroscopy technique using a computer for
data acquisition and processing has been worked out. It enables one to determine …

We investigated the background absorption spectrum of undoped and doped crystals within
the BMO family (Bi12MO20, M= Ge, Si, Ti). Dopants were Al, Fe, Cu, Cu/V, and Cr. Many of …

We show that photo‐induced current transients in semi‐insulating GaAs are well fitted by a
unique sum of exponentials including the anomalous case, in which one of the exponentials …

Exposing the photorefractive bismuth germanium oxide (BGO) at low temperatures to 2.5–
3.3 eV light produces photochromic absorption bands. In both undoped and Fe‐doped …

We have observed modulation of the dark current in Bi12SiO20 (BSO) as a function of prior
irradiation, and a time‐varying absorption of radiation that is dependent upon prior …

We present new results on the growth of semi-insulating vanadium-doped cadmium telluride
crystals and their characterization by different optical techniques such as photoinduced …

Principal and complementary space-charge gratings are formed in photorefractive bismuth
silicon oxide with use of 785-nm light. An electric field is optionally applied in the direction of …

FIG. 2, Logarithm of the diffraction efficiency (relative values) of the rt'-vca! ed grating at 0· C
as a function of the readout time. The decay during the initial and the final stages is …

Photon‐induced local departures from charge neutrality are the origin of the photorefractive
effect. When a periodic photorefractive grating is stored in the material, one can associate …

Bi 12 GeO 20 single crystals were investigated by thermally stimulated current (TSC)
experiments performed in the temperature range of 10–290 K. Recorded TSC glow curve …