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Related Experiment Video

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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

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Published on: September 30, 2019

High-precision two-dimensional displacement metrology based on matrix metasurface.

Haofeng Zang¹, Zhiyu Zhang¹, Zuotang Huang¹

¹Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei 230026, China.

Science Advances

|January 10, 2024

Summary

This study introduces a novel matrix metasurface for high-precision two-dimensional (2D) displacement metrology. It achieves angstrom-level precision over a hundred-micrometer range, enabling advanced industrial and scientific applications.

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Area of Science:

Optics and Photonics
Metamaterials Science
Nanotechnology

Background:

High-precision measurement of two-dimensional (2D) displacement is critical for industrial and scientific applications.
Existing metrology techniques face challenges in achieving angstrom-level precision over hundred-micrometer ranges for arbitrary displacements.

Purpose of the Study:

To develop and demonstrate a compact, high-precision 2D displacement metrology system.
To leverage matrix metasurfaces for ultrasensitive optical displacement sensing.

Main Methods:

Utilized a matrix metasurface to diffract incident light into three distinct polarization beams (H, V, D).
Retrieved 2D transverse displacement by analyzing interferential optical powers from coherent superposition of polarized beams.
Experimental validation of the metasurface-based metrology prototype.

Main Results:

Demonstrated arbitrary 2D displacement measurement with precision down to 0.3 nm.
Achieved a measurement range of 200 micrometers.
Confirmed the effectiveness of the metasurface for high-precision metrology.

Conclusions:

The developed matrix metasurface metrology offers a breakthrough in high-precision 2D displacement sensing.
This technology broadens the application scope of metasurfaces.
Paves the way for the development of ultrasensitive optical metrology systems.