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Updated: Aug 22, 2025
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
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Topological Insulator Films for Terahertz Photonics.
Kirill A Kuznetsov1, Sergey A Tarasenko2, Polina M Kovaleva1
1Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia.
Nanomaterials (Basel, Switzerland)
|November 11, 2022
Summary
Topological insulators (TIs) demonstrate efficient terahertz (THz) harmonic generation due to unique electronic properties. This research explores TI films for advanced THz photonics applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Photonics
Background:
- Topological insulators (TIs) possess unique electronic properties, including linear energy spectra.
- Terahertz (THz) frequency generation and conversion are crucial for advanced spectroscopy and imaging.
Purpose of the Study:
- To investigate the third harmonic generation (THG) in topological insulator thin films.
- To explore the use of TI-based photoconductive antennas for THz radiation generation.
Main Methods:
- Experimental studies of THG in Bi2Se3 and BSTS thin films.
- Development of a kinetic theory to support experimental findings.
- Characterization of THz radiation from TI-based antennas.
Main Results:
- Highly efficient frequency conversion in TI films, attributed to linear surface carrier spectra and rapid energy dissipation.
- Cubic dependence of the third harmonic field on the pump field up to 100 kV/cm.
- Successful generation and description of THz radiation from TI-based antennas.
Conclusions:
- Topological insulators are promising materials for efficient THz wave generation and frequency conversion.
- TI-based films can advance THz photonics applications.
- The developed kinetic theory accurately describes THG in TIs.
