Holographic methods for investigating solid-state photochemistry

The conventional recording of holographic images in a solid substrate may be thought of as a four-wave mixing process in which the resulting interference pattern is not transient, as in more conventional four-wave mixing experiments, but is permanent, in this paper, we describe the use of holographic techniques to obtain detailed information on solid-state photochemical processes. We describe two experiments in detail: the determination of quantum yields and the measurement of polymer chain lengths.