Author
W. C. Wang
Bio: W. C. Wang is an academic researcher. The author has contributed to research in topics: Crystal & Electric field. The author has an hindex of 1, co-authored 1 publications receiving 3 citations.
Topics: Crystal, Electric field, Ultrasonic sensor
Papers
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TL;DR: A strong lens effect has been experimentally observed when the electric field inside a CdS plate is so adjusted that strong quasi-standing ultrasonic waves are set up inside the crystal as mentioned in this paper.
Abstract: A strong lens effect has been experimentally observed when the electric field inside a CdS plate is so adjusted that strong quasi‐standing ultrasonic waves are set up inside the crystal. Physical understanding of the observed phenomena and possible device applications are discussed.
3 citations
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TL;DR: In this article, various experimental results are reported on the dcinduced optical effects in CdS and possible explanations are also given, including possible explanations of possible explanations for the effects.
Abstract: Various experimental results are reported on the dc‐induced optical effects in CdS. Possible explanations are also given.
3 citations
2 citations
TL;DR: In this article, the authors present a theory to explain the observed lens effect produced by a photocurrent in Cds, which predicts that the magnification should be linear in the power dissipated by the photocurrent and these predictions fall very near the measured values of magnification for different values of photoconductance.
Abstract: In this paper we present a theory to explain the observed lens effect produced by a photocurrent in Cds. An applied dc voltage causes local heating due to the presence of a localized photocurrent produced by a focused laser beam. The local heating causes an increase in the index of refraction and hence focusing. The theory predicts that the magnification should be linear in the power dissipated by the photocurrent and these predictions fall very near the measured values of magnification for different values of photoconductance, with no fitted parameters. In order to explain the threshold effect observed in some Cds samples the change in the index of refraction with temperature of Cds is measured over a temperature range of 20°–350° and is found to be dN/dT=1.5×10−4 (°C)−1.
1 citations