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Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells
Published on: February 9, 2012
Stimulated emission depletion microscopy with a supercontinuum source and fluorescence lifetime imaging
Egidijus Auksorius1, Bosanta R Boruah, Christopher Dunsby
1Physics Department, Imperial College London, Prince Consort Road, London SW7 2BW, UK. e.auksorius@imperial.ac.uk
Optics Letters
|January 17, 2008
Summary
We achieved super-resolution imaging using stimulated emission depletion (STED) microscopy integrated into a confocal microscope. This method overcomes the diffraction limit for clearer, detailed biological sample visualization.
Area of Science:
- Optical Microscopy
- Super-resolution Imaging
- Biophotonics
Background:
- Confocal microscopy is limited by the diffraction of light.
- Stimulated emission depletion (STED) microscopy offers a route to overcome these limitations.
- Super-resolution techniques are crucial for visualizing subcellular structures.
Purpose of the Study:
- To implement STED microscopy within a laser scanning confocal microscope.
- To achieve resolution beyond the far-field diffraction limit.
- To demonstrate STED fluorescence lifetime imaging microscopy.
Main Methods:
- Utilized supercontinuum generation in microstructured optical fiber for excitation light.
- Employed a flying spot scanner for overlapped excitation and depletion beams.
- Controlled depletion beam properties holographically with a spatial light modulator.
- Integrated time-correlated single photon counting for fluorescence lifetime imaging.
Main Results:
- Acquired images with enhanced lateral and axial resolution beyond the diffraction limit.
- Demonstrated rapid switching between STED imaging modes.
- Successfully compensated for optical path aberrations.
- Showcased STED fluorescence lifetime imaging microscopy capabilities.
Conclusions:
- STED microscopy can be effectively integrated into commercial laser scanning confocal systems.
- Holographic control offers flexibility and aberration correction for STED imaging.
- This approach provides a powerful tool for high-resolution biological imaging and analysis.
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