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Related Experiment Video

Updated: Feb 3, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

Reconfigurable infrared hyperbolic metasurfaces using phase change materials.

T G Folland¹, A Fali², S T White³

¹Department of Mechanical Engineering, Vanderbilt University, Nashville, TN, 37212, USA.

Nature Communications

|October 24, 2018

Summary

This summary is machine-generated.

This study introduces a reconfigurable hyperbolic metasurface using hexagonal boron nitride and vanadium dioxide. The novel design allows dynamic control over light propagation, enabling tunable optical functions for advanced nanophotonic devices.

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Area of Science:

Nanophotonics
Materials Science
Condensed Matter Physics

Background:

Metasurfaces offer nanoscale control of light but lack dynamic tunability.
Reconfigurable optical devices are crucial for advanced photonic applications.

Purpose of the Study:

To demonstrate a reconfigurable hyperbolic metasurface with dynamic control over light propagation.
To explore the use of phase-change materials in hyperbolic metasurfaces for tunable optical functions.

Main Methods:

Fabrication of a heterostructure combining isotopically enriched hexagonal boron nitride (hBN) with single-crystal vanadium dioxide (VO2).
Utilizing the phase transition of VO2 to create localized metallic and dielectric domains.
Investigating the launching, reflection, transmission, and refraction of hyperbolic phonon polaritons (HPhPs) at domain boundaries.

Main Results:

Demonstrated tunable wavelength of HPhPs in hBN over VO2 domains by a factor of 1.6.
Observed in-plane refraction of HPhPs, showcasing planar refractive optics capabilities.
Showcased localized control of dielectric environment by VO2 domains for manipulating HPhPs.

Conclusions:

The developed hyperbolic metasurface provides reconfigurable control of in-plane HPhP propagation.
This approach offers a generalizable framework for designing optical functionality by combining hyperbolic media and phase-change materials.
The system serves as a prototype for a new class of tunable planar refractive optics.