Actino-Electric Effects in Argentite

Abstract

Actino-electric effects are observed in argentite and it is shown that the seat of conversion of light into electronic energy occurs both at the contacts as well as at certain spots on the crystal. The effect is found to be absent if the crystal structure is destroyed. The actino-electric current-intensity curves show a peculiar secondary effect at certain intensities. On investigation of the actino-electric e.m.f.'s with reference to varying times of exposure and constant times of recovery it is found that an exponential relation exists between them which can be represented by i=^Ae~a t , The a, however, is not a constant but increases with time of recovery and is the determining factor in the dark current and photoelectric hysteresis of the crystal. It may be very intimately connected with the positive part of the primary photo--electric current as described by Gudden and Pohl.

New Class of Efficient Terahertz Generators: Effective Terahertz Spectral Filling by Complementary Tandem Configuration of Nonlinear Organic Crystals

“…First, the THz electric field is considered as generated in a single crystal based on the analytical solution of the nonlinear wave equation with plane‐wave and undepleted pump approximations, while also neglecting the cascading contributions to the frequency conversion process, as derived in refs. and . It was checked that the surface contributions were negligible compared to the bulk contributions for THz wave generation in this case .…”

“… and . It was checked that the surface contributions were negligible compared to the bulk contributions for THz wave generation in this case . For simplicity, the contribution of multiple reflections within the crystals was also neglected.…”