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Optical microscopy beyond the diffraction limit.

Igor I Smolyaninov¹

¹Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20742.

|May 1, 2009

Summary

This summary is machine-generated.

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Optical microscopy

Area of Science:

Optics and Photonics
Biomedical Imaging

Background:

Far-field optical microscopy resolution was historically limited by diffraction to ~lambda/2.
Immersion microscopy offered slight improvements (~lambda/2n) but was constrained by material refractive indices.
The diffraction limit in optical microscopy is being rapidly overcome.

Purpose of the Study:

To review the recent advancements in optical microscopy that are breaking the diffraction limit.
To highlight the potential of new techniques and materials in achieving nanoscale resolution.

Main Methods:

Nonlinear optical microscopy techniques utilizing photoswitching and fluorescence saturation.
Development of metamaterials for artificial optical media.
Exploration of linear immersion microscopes with metamaterials.

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Last Updated: Jun 23, 2026

Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers

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Published on: April 9, 2014

High-Throughput Total Internal Reflection Fluorescence and Direct Stochastic Optical Reconstruction Microscopy Using a Photonic Chip

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Published on: November 16, 2019

Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging

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Published on: September 8, 2017

Main Results:

Far-field resolution of 20-30 nm achieved with nonlinear optical microscopy techniques.
Metamaterials offer potential for overcoming diffraction limits, with resolution limited by losses.
Optical microscopy is progressing towards 10 nm resolution.

Conclusions:

The diffraction limit in optical microscopy is being demolished by novel techniques.
Metamaterials and advanced nonlinear methods are paving the way for sub-10 nm resolution.
This progress promises revolutionary advances in biomedical imaging.