Studying Temperature Changes with Hyperbolic Meta-Antennas
Author Information
Author(s): Henriksson Nils, Gabbani Alessio, Petrucci Gaia, Garoli Denis, Pineider Francesco, Maccaferri Nicolò
Primary Institution: Umeå University
Hypothesis
How do radiative and nonradiative processes in hyperbolic meta-antennas probe temperature changes of the surrounding medium?
Conclusion
The study found that nonradiative processes in hyperbolic meta-antennas are sensitive to temperature changes, while radiative processes are not.
Supporting Evidence
- The nonradiative contribution to extinction is sensitive to temperature changes.
- The radiative contribution remains unchanged across the temperature range studied.
- Enhanced damping effects due to electron–phonon scattering were observed.
- A red-shift of the nonradiative mode occurs for small temperature variations.
Takeaway
This study shows that special antennas can help us measure temperature changes very accurately by looking at how they absorb light.
Methodology
The study combined experiments with temperature-dependent effective medium theory to analyze the optical response of hyperbolic meta-antennas.
Limitations
The model may not account for nonlinear behavior in the thermal expansion of TiO2.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website