Related Experiment Video
Updated: Oct 12, 2025
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
15.5K
Wave-thermal effect of a temperature-tunable terahertz absorber
Optics Express
|November 23, 2021
Summary
This study introduces a terahertz (THz) absorber using heat-sensitive strontium titanate (STO) to dynamically control THz wave absorption via temperature. The research quantifies the wave-thermal effect for tunable THz device applications.
Area of Science:
- Terahertz (THz) photonics and metamaterials
- Condensed matter physics
- Materials science
Background:
- Heat-sensitive materials offer potential in sensors and tunable devices.
- The wave-thermal effect in heat-sensitive materials remains underexplored in the THz spectrum.
- Strontium titanate (STO) is a promising heat-sensitive material for THz applications.
Purpose of the Study:
- To investigate the incorporation of STO into a THz absorber.
- To explore the dynamic control of THz absorptance and frequency using temperature.
- To theoretically analyze and quantitatively predict the wave-thermal effect in the THz range.
Main Methods:
- Numerical simulations to design and analyze the THz absorber.
- Theoretical analysis of heat generation mechanisms (SPP, ohmic loss).
- COMSOL Multiphysics simulations for transient wave-thermal effect calculations.
Main Results:
- Simulated STO-based THz absorber demonstrates temperature-tunable absorptance and frequency.
- Identified surface plasmon polariton (SPP) and gold ohmic loss as key heat generation sources.
- Quantitative prediction of transient temperature variations due to THz wave absorption.
Conclusions:
- The proposed STO-based THz absorber enables dynamic control of THz wave absorption.
- Understanding the wave-thermal effect is crucial for designing tunable THz devices.
- Quantitative temperature predictions guide thermal management and device optimization.
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