| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Simpson, Robert E.
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2023Enhanced far-field coherent thermal emission using mid-infrared bilayer metasurfacescitations
- 2022Low energy switching of phase change materials using a 2D thermal boundary layercitations
- 2022Low energy switching of phase change materials using a 2D thermal boundary layercitations
- 20223D printing mesoscale optical components with a low-cost resin printer integrated with a fiber-optic tapercitations
- 2020Differences in Sb2Te3 growth by pulsed laser and sputter depositioncitations
- 2008Chalcogenide thin film materials for next generation data storage
Places of action
| Organizations | Location | People |
|---|
article
Enhanced far-field coherent thermal emission using mid-infrared bilayer metasurfaces
Abstract
A classical thermal source, such as an incandescent filament, radiates according to Planck’s law. The feasibility of super-Planckian radiation has been investigated with sub-wavelength-sized sources in the last decade. In such sources, a crystal-dependent coupling of photons and optical phonons is possible at thermal energies corresponding to that of room temperature. This interaction can be used to tailor the far-field thermal emission in a coherent manner, however, understanding heat transfer during this processes is still nascent. Here, we used a novel measurement platform to quantify thermal signals in Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>/SiO<sub>2 </sub>nanoribbon structure. We were able to separate and quantify the radiated, and conducted heat transfer mechanisms. The thermal emission from the Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>/SiO<sub>2</sub> nanoribbons was enhanced by 3.5× compared to that of a bare SiO<sub>2</sub> nanoribbon. Our model revealed that this enhancement was direct due to polaritonic heat transfer, which was possible due to the large and lossless dielectric permittivity of Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> at mid-IR frequencies. This study directly probes the far-field emission with a thermal gradient stimulated by Joule heating in temperature ranges from 100 to 400 K, which bridges the gap between mid-IR optics and thermal engineering.