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Related Experiment Video

Updated: May 19, 2026

Patterning via Optical Saturable Transitions - Fabrication and Characterization

Patterning via Optical Saturable Transitions - Fabrication and Characterization

Published on: December 11, 2014

Printing colour at the optical diffraction limit.

Karthik Kumar¹, Huigao Duan, Ravi S Hegde

¹Institute of Materials Research and Engineering, A*STAR, 3 Research Link, Singapore 117602.

Nature Nanotechnology

|August 14, 2012

Summary

This summary is machine-generated.

Researchers developed a novel non-colourant printing method to achieve high-resolution color images up to the optical diffraction limit. This technique encodes color in metal nanostructures, enabling scalable production for advanced applications.

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Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

Published on: May 5, 2016

Area of Science:

Optics and Photonics
Nanotechnology
Materials Science

Background:

The diffraction limit of visible light dictates the highest resolution for printed color images, requiring nanoscale pixels (250 nm pitch) for resolutions around 100,000 dots per inch (d.p.i.).
Current methods using colorants or plasmonic structures for structural color lack sufficient resolution and scalability for achieving the theoretical diffraction limit.

Purpose of the Study:

To present a non-colourant method for producing bright-field color prints that reach the optical diffraction limit.
To demonstrate a scalable approach for high-resolution color image fabrication using nanostructure engineering.

Main Methods:

Encoding color information within the dimensional parameters of precisely fabricated metal nanostructures.
Tuning the plasmon resonance of these nanostructures to determine the color of individual pixels.
Utilizing nanoimprint lithography for potential large-volume manufacturing of these nanoscale color elements.

Main Results:

Achieved bright-field color prints with resolutions up to the optical diffraction limit.
Demonstrated a color-mapping strategy enabling sharp color transitions and subtle tonal variations.
Verified that color is determined by the plasmon resonance of engineered metal nanostructures.

Conclusions:

The developed non-colourant method overcomes the resolution limitations of existing techniques for high-fidelity color printing.
This approach offers a scalable pathway for fabricating microimages with potential applications in security, steganography, optical filters, and data storage.