Abstract

Materials that can be switched between two optical states have been considered in thin-film form for a number of applications. Unfortunately, stringent requirements on optical performance often preclude a simple structure of thin-film bistate material deposited on a suitable massive substrate. Multilayer designs are then suggested as a means to enhance optical switch properties. A challenging problem in thin-film optics now arises: how does one design a multilayer structure that includes a material having two sets of optical constants and still meet performance requirements for both switch states? We discuss a general, analytical model that predicts optical performance limits for these devices and allows optical specifications to be made for component parts.

© 1985 Optical Society of America