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Electromagnetic Waves in Matter

Electromagnetic Waves in Matter

Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
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Related Experiment Video

Updated: May 5, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Quantum Geometry Enabled High-Performance Terahertz Detection.

Mingyang Wu^1,2, Mingyu Zhang^1,2, Zhanqi Zhang^1,2

¹National Key Laboratory of Laser Spatial Information, School of Integrated Circuits, Harbin Institute of Technology, Shenzhen 518055, China.

ACS Applied Materials & Interfaces

|December 31, 2025

Summary

This summary is machine-generated.

Quantum geometry enables new terahertz (THz) detectors that operate without external bias, offering high performance for applications like 6G wireless and biosensing.

Keywords:

Berry curvature THz detection nonlinear Hall effect quantum geometry quantum metric room-temperature operation

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Area of Science:

Physics
Materials Science
Quantum Technologies

Background:

Terahertz (THz) technology is crucial for next-generation wireless communication, bioimaging, and security.
Conventional THz detectors face limitations in bandwidth, sensitivity, and operational requirements.

Purpose of the Study:

To introduce a novel THz detection mechanism based on quantum geometry (QG).
To explore the use of topological band properties for THz photocurrent generation.

Main Methods:

Leveraging topological band properties like Berry curvature and quantum metric effects.
Developing devices that generate THz photocurrents at room temperature without external bias.
Classifying devices into high-order (e.g., nonlinear Hall rectifiers) and low-order (e.g., anomalous and spin Hall) systems.

Main Results:

Achieved broadband operation exceeding 75 THz.
Demonstrated ultralow noise-equivalent power.
Successfully generated THz photocurrents at room temperature without external bias.

Conclusions:

Quantum geometry offers a transformative paradigm for THz photodetectors.
Topologically enhanced THz photodetectors enable scalable solutions.
Significant implications for 6G wireless, label-free biosensing, and quantum photonics.