Light-induced EMF in silver-palladium film resistors |
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Authors: | Mikheev G M Zonov R G Aleksandrov V A |
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Affiliation: | 1.Institute of Applied Mechanics, Ural Branch, Russian Academy of Sciences, Izhevsk, Udmurtia, 426067, Russia ; |
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Abstract: | We have studied the generation of nanosecond emf pulses in silver-palladium film resistors under the action of radiation of
a Q-switched laser. The samples were fabricated using the technology of thick film resistors on dielectric substrates, based
on fusing a resistive paste that contains palladium, silver oxide, glass, and an organic binder into the substrate at 880
K. The amplitude of detected pulses exhibits linear growth with the power of incident laser radiation, depends on the angle
of light incidence (vanishes at the normal incidence) onto the film and the angle of film rotation about the normal to its
surface, and changes its sign with that of the incidence angle. The duration of the generated emf pulses is several times
that of the incident laser pulses. The signal is not of a thermoelectric nature and can be related to the current generation
by means of the surface photogalvanic effect and the photon quasi-momentum transfer to charge carriers during light absorption
by the film material. |
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