Optical properties of nanostructure formed on a surface of CdZnTe crystal by laser radiation

Laser-induced increase of resistivity and improvement of optical properties of CdZnTe crystal

“…This phenomenon is explained by the thermogradient effect (TGE) [19][20][21]. The photon energy of the laser light is lower than the band-gap of the CdZnTe crystal and therefore the absorption coefficient of the laser light is low.…”

Enhancement of Resistivity of CdZnTe Crystal by Laser Radiation

“…In turn, this leads to the decrease of mobility and to increase in resistivity [14,15]. This effect is explained by the thermogradient effect [10,11,16]. The band-gap of the CdZnTe crystal is higher than photon energy of laser radiation.…”

“…The possibility to improve crystal quality by CO 2 laser irradiation was shown, but this method leads to the damage of the crystal surface during laser processing [5,6]. Recently, we have developed a method to change the chemical composition and structural properties of the CdZnTe surface using Nd:YAG laser (λ=532 nm) [7][8][9][10][11]. In this study, we present the new results on the enhancement of CdZnTe crystal resistivity by the laser radiation and discuss the changes in infrared spectra and electrical properties of the CdZnTe crystals before and after irradiation by the λ=1064 nm Nd:YAG laser.…”

Laser-Induced Modification of the Surface State and Optical Properties of CdTe Crystals

“…Laser irradiation of CdTe has been used for different kinds of surface processing, including cleaning, etching, oxide film removal, stress relieving, local annealing, epitaxial recrystallization, nanostructure formation, formation of homo and hetero-interfaces, etc. [4][5][6][7]. However, any surface treatment is accompanied by changes of morphology and surface state, transformation of structure, formation of regions with residual internal stresses, etc.…”