A new type of surface-state semiconductor saturable absorption mirror was introduced, with which passive Q-switched modelocking of diode-end-pumped Yb∶ YAG laser was realized. At the 1.4 W of pumping power, Q-switched modelocking seires was obtained, which has 1 mW average output and 200 MHz frequency.
By such principle,a new type of surface-state semiconductor saturable absorption mirror was introduced,with which we realize passive continuous wave modelocking of diode-end-pumped Nd:YAG laser.
The surface state of electrolytic silver before and after treatment with a reaction mixture in the course of ethylene glycol oxidation to glyoxal was studied using X-ray photoelectron spectroscopy and scanning electron microscopy.
The band model of the photochromic process in the "microcrystal-surface states-glass" system is proposed on the basis of the performed analysis with due regard for burning of the exciton hole in the induced spectrum of CuCl-containing glass.
It is found that the permittivity increases with a decrease in the frequency of the polarizing field due to the possible effect exerted by defect surface states on the polarization processes occurring in the layers of this system.
An experimental study is conducted into the effect of ultrasonic treatment on the surface-state distribution function of a gamma-irradiated Si/SiO2 interface.
It is shown that vacancy alignment in semiconductor layers with thickness ?100 ? at liquid-nitrogen temperatures and lower can be most effectively caused by the electric field which can exist in such layers due to a surface-state charge.
Based on the experimental results, a model of charge transport is suggested and the effective barrier height ?beff, the insulator layer thickness δ, and the surface-state density DS are determined.
A method for determining the energy spectrum of charges and surface-state densities at the interfaces of semiconductor-insulator-semiconductor structures was developed; the method is based on the analysis of capacitance-voltage characteristics.
It was shown that fluorine-containing components, which were introduced into electrolyte, reduced the value of the built-in charge and the surface-state density to minimal measurable values of ?2×1010 cm-2 eV-1.