Wide-Field Super-Resolution Optical Fluctuation Imaging through Dynamic Near-Field Speckle Illumination | JoVE Visualize

Wide-Field Super-Resolution Optical Fluctuation Imaging through Dynamic Near-Field Speckle Illumination

Young Choi¹, MinKwan Kim^1,2, ChungHyun Park^1,3

¹Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.

Nano Letters|March 4, 2022

View abstract on PubMed

Summary

This study introduces near-field speckle illumination for super-resolution microscopy, overcoming limitations of conventional methods. The technique enhances Stochastic Optical Fluctuation Imaging (SOFI) resolution without needing blinking fluorophores.

Area of Science:

Microscopy and Imaging Science
Optical Physics
Biotechnology

Background:

Stochastic Optical Fluctuation Imaging (SOFI) uses blinking dynamics for super-resolution.
Far-field speckle illumination in SOFI limits resolution due to diffraction-limited speckle size.
Closely located emitters hinder SOFI's super-resolution potential with far-field speckles.

Purpose of the Study:

To develop a surface-sensitive super-resolution technique using dynamic near-field speckle illumination.
To overcome the resolution limitations imposed by far-field speckles in SOFI.
To achieve full super-resolving power of SOFI without relying on blinking fluorophores.

Main Methods:

Exploiting dynamic near-field speckle illumination for SOFI.
Utilizing surface-sensitive imaging principles.
Applying statistical analysis to fluorescence fluctuation dynamics.

Main Results:

Achieved 2.8-fold and 2.3-fold lateral spatial resolution enhancement with computational and experimental targets, respectively.
Demonstrated super-resolution of fluorescent beads separated by 175 nm using 150 nm near-field speckles.
Showcased potential for sub-100 nm resolution with smaller speckle patterns.

Conclusions:

Near-field speckle illumination significantly enhances SOFI resolution.
The technique offers a pathway to super-resolution imaging without blinking fluorophores.
This method promises advanced nanoscale imaging capabilities for biological and material sciences.