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Related Experiment Video

Updated: May 1, 2026

Patterning via Optical Saturable Transitions - Fabrication and Characterization

Patterning via Optical Saturable Transitions - Fabrication and Characterization

Published on: December 11, 2014

Three-Dimensional Nanopatterning Using Extreme Ultraviolet Colloidal Talbot Lithography.

Saurav Mohanty¹, Ethan Flores¹, Daniel Hur¹

¹Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States.

|April 30, 2026

Summary

This summary is machine-generated.

This study introduces extreme ultraviolet (EUV) colloidal Talbot lithography (CTL) to create 3D nanostructures. This novel method achieves 25 nm feature sizes in a single exposure, advancing nanolithography capabilities.

Keywords:

3D nanolithography EUV lithography Talbot effect colloidal assembly

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Last Updated: May 1, 2026

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Area of Science:

Nanotechnology
Lithography
Materials Science

Background:

Current extreme ultraviolet (EUV) lithography is restricted to 2D structures.
Scaling challenges persist for high-resolution 3D nanostructure fabrication.

Purpose of the Study:

To demonstrate EUV colloidal Talbot lithography (CTL) for 3D nanostructure patterning.
To achieve 25 nm minimum feature sizes in 3D using a single exposure.

Main Methods:

Utilized a self-assembled nanosphere monolayer as a binary mask.
Employed a tabletop high-harmonic generation (HHG) EUV source for volumetric patterning.
Conducted finite difference time domain (FDTD) simulations to analyze interference patterns.

Main Results:

Successfully fabricated 2D nanostructures with tunable unit-cell geometry.
Achieved 3D nanostructures with feature sizes as small as 25 nm.
Demonstrated single-exposure 3D EUV lithography with high fringe contrast.

Conclusions:

EUV CTL is a cost-effective method for single-exposure 3D nanolithography.
The technique requires minimal hardware, making it broadly accessible.
Applications include nanophotonics, quantum devices, and advanced materials.