Photodimerization of chromophores attached to a short peptide chain is investigated for high-capacity optical digital storage with UV lasers. The length and rigidity of the peptide chain assure an optimal distance and orientation of the chromophores for effective photodimerization. Using a theory developed by Tomlinson, the absorption cross section for the dimerization process in a uracil–ornithine-based hexamer is determined to be 9 × 10 -20 cm 2 . A large change in the transmission due to irradiation in the UV area may make it possible to realize multilevel storage in a thin film of the peptides.
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Lohse et al. (2006) studied this question.
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