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Abstract
Modulation of light scattering by electric field in anthracene crystals is reported. Scattered light was that obtained from a He-Ne laser. Effective modulation of scattered light was possible only when concentration of trapped charge carriers was changed by an external electric field under space-charge-limited conditions. External voltage characteristics of electromodulation signal were structured, the signal height was up to ten percent. The observed effect is discussed in terms of the modulation of the population of the filled up charge trapping domains responsible for the light scattering. The change in the local complex refractive index due to the charge captured by a spatially extended defect (macrotrap) is considered as the most probable microscopic mechanism of the effect.