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Related Experiment Video

Updated: Mar 7, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

Electrically Tunable Optofluidic Metasurface.

Samuel F J Blair¹, Minahil Khan¹, Christopher P Reardon¹

¹School of Physics, Engineering & Technology, University of York, Heslington, York YO12 5DD, U.K.

|March 6, 2026

Summary

This summary is machine-generated.

We developed a tunable metasurface using optofluidics for dynamic light control. This novel design achieves significant spectral and phase tuning with high efficiency, paving the way for advanced photonic devices.

Keywords:

biosensing indium tin oxide optofluidics photonics tunable metasurface wavefront engineering

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Area of Science:

Photonics
Nanotechnology
Materials Science

Background:

Dynamic control of nanoscale light is a key challenge in photonics.
Integrating fluidics offers new possibilities for tunable optical devices.

Purpose of the Study:

To present a novel tunable metasurface architecture integrating an optofluidic layer.
To overcome the efficiency-loss trade-off in dynamic metasurfaces.

Main Methods:

Utilized a guided mode resonance platform with a silicon nitride grating.
Coated the grating with indium tin oxide (ITO) as the active material.
Employed an all-dielectric structure with a fluidic gate for tuning.

Main Results:

Demonstrated spectral and phase tuning in the visible-NIR range (~800 nm).
Achieved a near-2π phase shift with a low voltage swing (±3 V).
Maintained high resonance amplitude (R > 80%) in an all-pass filter configuration.

Conclusions:

The developed optofluidic metasurface offers high-performance dynamic light control.
The design provides a foundation for advanced tunable photonic devices with broad applications.