2PE-STED microscopy with a single Ti:sapphire laser for reduced illumination.

Li, Qifeng; Wang, Yang; Chen, Da; Wu, Sherry S H · PLoS One · 2014

basic_science · Level V

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Abstract

We reported a new effective approach to carry out two-photon excitation stimulated emission depletion (2PE-STED) microscopy using a single Ti:sapphire laser system. With an acoustic-optic Bragg cell, the modulated-CW 2PE STED microscope had the benefits of both CW and pulse approaches: lower input power, simple optical scheme and no complicated synchronization. Additionally, it also took advantages of fluorescence yield increasing. The sub-diffraction-limit resolution was demonstrated using ATTO 425-tagged clathrin-coated vesicles.

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