Device, method and apparatus for optical modulation.

摘要

An optical recording method comprises writing in a ferroelectric material heated at or above the glass transition point, and holding the resultant written state below the glass transition point. Preferably, the ferroelectric material constituting the optical recording layer has an optical thickness capable of providing a multiple reflection state. The multiple reflection state of the optical recording layer is locally changed at or above the glass transition point by irradiating the optical recording layer under an electric field with a laser beam in order to write in the optical recording layer.