Abstract

We report the generation of thin (< 50 nm) fluorescence layers on a glass substrate in the focal region of a high-numerical-aperture lens by employing subpicosecond pulses of 0.75-TW/cm2 peak intensity. The conditions for generating the fluorescence layers are described. We find that the fluorescence molecules at the glass interface are less affected by bleaching than those in the surrounding area. The fluorescence layers are suited for measuring and monitoring the axial resolution of two-photon fluorescence microscopes.

© 1995 Optical Society of America

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