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First‐harmonic electromodulation in uniaxial crystals
Author(s) -
Suisky D.,
Boyn R.,
Enderlein R.,
Biering B.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220850123
Subject(s) - uniaxial crystal , pockels effect , perpendicular , polarization (electrochemistry) , condensed matter physics , materials science , electric field , optics , crystal (programming language) , rotation (mathematics) , optical axis , physics , chemistry , geometry , programming language , mathematics , quantum mechanics , computer science , lens (geology)
A discussion is given of an electromodulation mechanism which occurs in uniaxial crystals for electric fields perpendicular to the optical axis. This mechanism is based on the electro‐optical Pockels effect, which produces a rotation of the polarization directions of the ordinary and extraordinary light waves propagating in the crystal. In the presence of polarization‐dependent zero‐field transmission of the material, this leads to a change of transmission which is linear in the field. It is shown that this mechanism makes a significant contribution to the F ⟂ c electromodulation spectra of transition metal centres in wurtizite‐type CdS obtained recently, and that on this basis it is possible to understand the spectral shapes of the signals found in this geometry. An analogous mechanism should contribute to the electroreflection of uniaxial crystals.