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Super-resolution Fluorescence Microscopy

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...

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Related Experiment Video

Updated: May 10, 2025

Highly Multiplexed, Super-resolution Imaging of T Cells Using madSTORM

Highly Multiplexed, Super-resolution Imaging of T Cells Using madSTORM

Published on: June 24, 2017

Multidimensional multiplexing metalens for STED microscopy.

Ziheng Ji¹, Qinmiao Chen¹, Xinbo Sha¹

¹Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, Guangdong, China.

Science Advances

|April 23, 2025

Summary

This summary is machine-generated.

Researchers developed a compact Stimulated Emission Depletion (STED) microscope using a single metalens. This breakthrough miniaturizes super-resolution imaging, enabling broader applications beyond traditional lab settings.

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Last Updated: May 10, 2025

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Area of Science:

Optics and Photonics
Microscopy
Materials Science

Background:

Stimulated Emission Depletion (STED) microscopy offers super-resolution imaging vital for life sciences and data storage.
Current STED microscopes are often bulky and confined to laboratory environments, limiting their accessibility and application scope.

Purpose of the Study:

To demonstrate a compact STED lens utilizing a single metasurface.
To miniaturize STED microscopy for enhanced portability and integration into diverse setups.

Main Methods:

Exploited multidimensional multiplexing properties of metalenses.
Designed a single metasurface to focus a 635-nm excitation beam into a Gaussian profile.
Engineered the same metasurface to convert a 780-nm depletion beam into a donut-shaped focus.

Main Results:

Achieved STED super-resolution imaging using the metalens by recording photoluminescence.
Demonstrated a resolution of 0.7 times the diffraction limit, with potential for further improvement.
Successfully created a compact STED lens with a single metasurface.

Conclusions:

The study presents a significant advancement in miniaturizing STED microscopes.
This metalens-based approach paves the way for integrated and portable super-resolution imaging systems.