optical recording media having a increased recording density and optical recording/reproducing apparatus using the optical recording media

摘要

An optical recording medium in which reducing an optical spot size is enabled includes a thin metal film (241) which is formed on an information recording layer (242) opposing a focusing device (26), for reflecting and transmitting light incident from the focusing device (26). A relationship of n1Sin1n2n1 is satisfied when n1 is a refractive index of the focusing device, 1 is an incident angle, and n2 is a refractive index of the thin metal film, and n2 is smaller than one. The thickness of the thin metal film (241) has a value within a wavelength of light used. IMAGE