Optical recording medium for short-wavelength of laser beam and read/write/erase method using the medium

A data rewritable optical recording medium on which reading/writing of data is executed by applying a laser beam thereto, said optical recording medium comprising:

• a substrate;
• a first transparent dielectric layer formed on said substrate, having a refractive index in a range of not smaller than 1.4 and not greater than 1.7;
• a second transparent dielectric layer formed on said first dielectric layer, having a refractive index greater than that of said first dielectric layer and having its thickness being not greater than 80 nm wherein its thickness is set in a range of not smaller than .lambda./6.4 n and not greater than .lambda./3.9 n, where .lambda. represents the wavelength of the laser beam and n represents the refractive index of said second dielectric layer;
• an optical recording layer formed on said second dielectric layer, so that said first and second dielectric layers and optical recording layer are laminated in this order on said substrate,
• wherein the total film thickness of said first and second dielectric layers is not smaller than 90 nm.