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Related Experiment Video

Updated: Aug 6, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Metamaterial properties of Babinet complementary complex structures.

Emese Tóth¹, Balázs Bánhelyi², Olivér Fekete¹

¹Department of Optics and Quantum Electronics, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary.

Scientific Reports

|March 23, 2023

Summary

This summary is machine-generated.

Researchers explored sub-wavelength periodic patterns for light manipulation. They demonstrated asymmetric transmission and achieved a negative refractive index in 3D structures using coupled nano-object layers for visible light applications.

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Area of Science:

Plasmonics and Nanophotonics
Metamaterials
Optical Physics

Background:

Sub-wavelength periodic structures offer unique light-matter interactions.
Babinet complementary patterns provide a versatile platform for optical device design.
Controlling light polarization and achieving negative refractive index are key challenges in nanophotonics.

Purpose of the Study:

To investigate the optical properties of single and multiple layers of periodic Babinet complementary nano-object miniarrays.
To demonstrate polarization control, asymmetric transmission, and negative refractive index phenomena.
To explore the role of nano-object geometry and interlayer coupling in visible light manipulation.

Main Methods:

Fabrication and optical characterization of sub-wavelength periodic patterns composed of rounded nano-object miniarrays.
Analysis of transmitted signal components under linearly and circularly polarized light illumination.
Investigation of three-dimensional structures with complex convex-concave pattern layers.

Main Results:

Demonstrated polarization-dependent and handedness-independent transmission characteristics.
Observed considerable asymmetric transmission in extended bands for single-layer structures.
Achieved a negative refractive index at the visible region boundary in 3D structures due to synchronized dipolar modes and interlayer coupling.

Conclusions:

The study confirms the ability to control light polarization and induce asymmetric transmission using periodic nano-object arrays.
Three-dimensional structures exhibit a negative refractive index, paving the way for novel optical devices in the visible spectrum.
The location of the negative index can be predicted by analyzing copolarized transmittance signals.