Patent ID: 8449794

Claim:
A non-resonant two-photon absorption recording material comprising: (a) a non-resonant two-photon absorption compound, and (b) a recording component in which at least either refractive index or fluorescence intensity changes, wherein the non-resonant two-photon absorption compound (a) is a compound having the structure represented by the following formula (1): wherein each of X and Y represents a substituent having a Hammett's sigma para-value (σp value) of 0 or more, which may be the same with or different from each other; n represents an integer of 1 to 4; R represents a substituent, and a plurality of R's may be the same with or different from every other R; and m represents an integer of 0 to 4, provided that when n is 1, m is 1 or more, and when n is 2 or more, at least any of n-groups of phenylene groups is m≧1.