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Optical setup for recording and reading the bit data.
Microscopic images of recorded bit data. The images were obtained by a reflection confocal microscope. The polarizations of the recording and reading lights was (a) parallel and (b) perpendicular to each other.
Line plots of the reflected intensity from the recorded bit data. The line plots (a) and (b) correspond to the lines between two arrows in Figs. 2(a) and 2(b), respectively.
Dynamics of the multiphoton induced dichroic absorbance changes of DR1 in PMMA. The excitation light was that of a linearly polarized regeneratively amplified Ti:Sapphire laser (, pulse , repetition , average , and beam diameter ). The absorbance change was probed by a linearly polarized continuous-wave green laser (, power , and beam diameter ). and are the absorbances in the directions parallel and perpendicular to the excitation polarization, respectively. is the isotropic absorbance, and it is given by . The inset is the anisotropy .
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