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Emission spectrum of the (core) NC solid upon pulsed laser irradiation, demonstrating the 2PE induced photoenhancement. Intensity ; insets: (a) PMT image of photoenhanced spots on NC solid; distance between the spots: , exposure; (b) typical time traces of the 2PE enhancement, ; (c) spectral evolution of the trace shown in (b).
Log–log plot of the time trace of 2PE induced enhancement of the sample shown in Fig. 1(b), detection without a pinhole. The solid line is a double exponential rise fit. Insets: (a) time trace of the 1PE enhancement of the same sample, , laser ; (b) time trace of the 2PE enhancement [the same condition as Fig. 1(b)], detection with a pinhole (pinhole radius ). Solid lines in insets are fits to the single exponential rise model in Eq. (1).
images demonstrating the multilayer recording by the 2PE induced enhancement in the NC solid film. Dot spacing , layer spacing , power , exposure time per dot.
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