Nonlinear optical thin film, optical recording medium using nonlinear optical film and optical switch

摘要

An optical information recording medium uses a nonlinear optical thin film (1) formed on a substrate (2) either directly or through other layer and comprising an amorphous alloy or a mixture of the amorphous alloy and an oxide glass component, and a refractive index of this thin film (1) reversibly changes in accordance with a change of intensity of a laser beam incident thereto.