PURPOSE: A reverse saturation absorption sensitizer for an optical data storage medium and a use method thereof are provided to supply high quantization efficiency when low-intensity recording light is used with M-sub-PC RSA(Reverse Saturable Absorber) dyes. CONSTITUTION: A reactant(14) is arranged in a polymer matrix. When energy is delivered from a sensitizer(12) of an excited state, a refractive index of a composition of the reactant is changed. A non-linear sensitizer is arranged in the polymer matrix. When the non-linear sensitizer is exposed to light which exceeds an intensity threshold value, the non-linear sensitizer is to be excited. The reactant includes an M-sub-PC RSA. [Reference numerals] (12) Sensitizer; (14) Reactant; (16) Product
REVERSE SATURABLE ABSORBTION SENSITIZERS FOR OPTICAL DATA STORAGE MEDIA AND METHODS FOR USE