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Updated: Oct 21, 2025
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Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
Published on: August 15, 2015
10.0K
Temperature-induced surface phonon polaritons dissipation in perovskite SrTiO3
Optics Letters
|September 1, 2021
Summary
Temperature significantly impacts strontium titanate (SrTiO3) nanostructures. Lattice vibrations weaken localized surface phonon resonances at higher temperatures, affecting their use in nanophotonics.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanophotonics
Background:
- Strontium titanate (SrTiO3) is a key material for nanophotonics, enabling subdiffraction light confinement.
- The influence of lattice vibrations on SrTiO3's surface phonon polaritons (SPhPs) and localized surface phonon resonances (LSPhRs) is not well understood.
Purpose of the Study:
- To investigate the temperature-dependent behavior of infrared dielectric functions, SPhPs, and LSPhRs in SrTiO3.
- To elucidate the underlying physics governing these temperature effects.
Main Methods:
- Spectroscopic ellipsometry (SE) experiments.
- Multiscale simulations, including first-principles calculations and finite-difference time-domain (FDTD) methods.
Main Results:
- Infrared dielectric functions of SrTiO3 vary significantly with temperature.
- First-principles calculations confirm photon-oxygen atom coupling forming SPhPs.
- LSPhRs in SrTiO3 nanodisks diminish at 250 K due to strengthened lattice vibrations and reduced phonon relaxation lifetime.
Conclusions:
- Temperature plays a crucial role in tuning SPhPs and LSPhRs in SrTiO3.
- Understanding these effects is vital for optimizing SrTiO3's application as photonic resonators, especially at elevated temperatures.
