Laser-induced modification of optical properties of glassy selenium films synthesized by vacuum thermal evaporationстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 21 октября 2020 г.
Аннотация:The influence of laser radiation at the wavelength of 632.8 nm on the optical properties of ~ 1 µm thick Se (a-Se) glassy films synthesized by vacuum thermal evaporation on quartz substrates has been studied. It is established that an insignificant decrease in their transmittance coefficients (T) and optical gap energy (Eg ) is observed after the laser irradiation of the obtained films with a power density of 80 W/cm2. For the first time, an increase in the reflection coefficient (R) and refractive index (n) of the films was detected in the course of long-term relaxation of their amorphous matrix to a more stable state caused by phase changes in a-Se films. It was established that a significant decrease in transmittance and reflection coefficients, refractive index, and Eg occurs after the laser irradiation of a-Se films with a higher power density (5300 W/cm2).