Recording mechanisms in antireflection trilayer structures

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Abstract
Any recording mechanism which produces a high-reflectivity spot by disrupting the interference condition which results in the initially low reflectivity of the trilayer structure is a potential mode of recording and data storage. Experimental results are presented for deep pit and bubble modes of recording. In the deep pit mode both the absorber and dielectric layers are melted so that the pit penetrates to the reflector layer. In the bubble mode, outgassing of the dielectric layer results in a micron-sized raised blister or bubble in the absorber layer. The bubble mode, in particular, offers the potential for high sensitivity and high SNR recording characteristics without the use of low melting point absorber layer materials.

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