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Three-dimensional Optical-resolution Photoacoustic Microscopy

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3D Super-Resolution Optical Profiling Using Microsphere Enhanced Mirau Interferometry.

Ivan Kassamakov¹, Sylvain Lecler², Anton Nolvi³

¹University of Helsinki, Helsinki, Finland. ivan.kassamakov@helsinki.fi.

Scientific Reports

|June 18, 2017

Summary

This summary is machine-generated.

Researchers developed a microsphere-enhanced interferometric microscope for high-resolution 3D imaging of Blu-ray disc grooves. This novel technique achieves nanometer-scale axial resolution and ~112nm lateral resolution, with potential applications in biomedicine and nanotechnology.

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Area of Science:

Optical microscopy
Nanotechnology
Materials science

Background:

High-resolution imaging is crucial for analyzing micro- and nanoscale structures.
Interferometric microscopy offers non-contact surface profiling capabilities.
Microspheres can generate photonic nanojets, potentially enhancing optical resolution.

Purpose of the Study:

To develop and validate a novel 3D imaging technique for Blu-ray disc grooves.
To investigate the role of photonic nanojets in enhancing microscopic resolution.
To achieve nanometer-scale resolution for surface characterization.

Main Methods:

Utilized a Mirau interferometric microscope equipped with a microsphere as a photonic nanojet source.
Performed quantitative 3D imaging of writable Blu-ray Disc grooves.
Developed computational models to simulate photonic nanojet interaction with the disc surface.

Main Results:

Achieved axial resolution of a few nanometers and lateral resolution of approximately 112 nm.
Demonstrated agreement between simulation results and experimental data.
Identified the potential role of coherence in achieving lateral super-resolution.

Conclusions:

The microsphere-assisted interferometric system provides high-resolution 3D imaging of microstructures.
Photonic nanojets contribute to understanding the imaging process and achieving enhanced resolution.
This imaging modality holds promise for applications in biomedicine and nanotechnology.