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Related Experiment Video

Updated: Jul 13, 2026

Conducting Multiple Imaging Modes with One Fluorescence Microscope

Conducting Multiple Imaging Modes with One Fluorescence Microscope

Published on: October 28, 2018

Breaking the diffraction barrier in fluorescence microscopy by optical shelving.

Stefan Bretschneider¹, Christian Eggeling, Stefan W Hell

¹Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, 37070 Göttingen, Germany.

Physical Review Letters

|August 7, 2007

Summary

Researchers broke the diffraction resolution barrier in far-field fluorescence microscopy by using a metastable dark state. This technique achieves nanoscale optical resolution down to 50 nm, enabling detailed cellular imaging.

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Area of Science:

Optics and Photonics
Biophysics
Cell Biology

Background:

Far-field fluorescence microscopy is limited by the diffraction of light.
Achieving nanoscale resolution is crucial for visualizing subcellular structures and molecular interactions.

Purpose of the Study:

To overcome the diffraction limit in far-field fluorescence microscopy.
To develop a method for achieving nanoscale optical resolution.

Main Methods:

Transiently shelving fluorophores into a metastable dark state.
Utilizing a focal distribution with a local zero and modest light intensity.
Confining fluorescence emission to sub-wavelength spots.

Main Results:

Demonstrated nanoscale far-field optical resolution down to 50 nm.
Successfully imaged microtubules in mammalian cells.
Visualized proteins on the plasma membrane of neurons.

Conclusions:

The diffraction resolution barrier in far-field microscopy can be broken.
The use of dark states in fluorescent molecules offers a new approach for super-resolution microscopy.
This technique provides a pathway for optical resolution beyond the diffraction limit.