The Dragging Effect in Ag/Pd Nanocomposite Film: Generation of Bipolar Pulses
- 16 Downloads
Characteristic features of the phenomenon of longitudinal photocurrent generation in Ag/Pd nanocomposite films under the obliquely incident nanosecond pulsed laser irradiation with wavelengths in the 1350–4000 nm range have been studied for the first time. Films of 20-μm thickness consisting of nanocrystals of Ag–Pd solid solution and palladium oxide (PdO) were obtained using a thick-film technology. The influence of radiation wavelength on photocurrent pulses has been studied for s- and p-polarized laser pumping. It is established that the photocurrent pulses generated by s-polarized pumping in the 1350–4000 nm wavelength range are monopolar, while p-polarized pumping can generate both mono- and bipolar pulses depending on the wavelength. The obtained results are explained by simultaneous generation of photocurrent due to the dragging effect and the surface photogalvanic effect.
Unable to display preview. Download preview PDF.