Near-Field Energy Extraction with Hyperbolic Metamaterials
| Autor: | Sheng Shen, Li Yen Ng, Baoan Liu, Jiawei Shi, Pengfei Li |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Radiative cooling business.industry Mechanical Engineering Radiant energy Bioengineering General Chemistry Condensed Matter Physics Optics Thermal radiation Thermophotovoltaic Heat transfer Energy transformation Optoelectronics General Materials Science Black-body radiation business Thermal energy |
| Zdroj: | Nano Letters. 15:1217-1221 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | Although blackbody radiation described by Planck's law is commonly regarded as the maximum of thermal radiation, thermal energy transfer in the near-field can exceed the blackbody limit due to the contribution from evanescent waves. Here, we demonstrate experimentally a broadband thermal energy extraction device based on hyperbolic metamaterials that can significantly enhance near-field thermal energy transfer. The thermal extractor made from hyperbolic metamaterials does not absorb or emit any radiation but serves as a transparent pipe guiding the radiative energy from the emitter. At the same gap between an emitter and an absorber, we observe that near-field thermal energy transfer with thermal extraction can be enhanced by around 1 order of magnitude, compared to the case without thermal extraction. The novel thermal extraction scheme has important practical implications in a variety of technologies, e.g., thermophotovoltaic energy conversion, radiative cooling, thermal infrared imaging, and heat assisted magnetic recording. |
| Databáze: | OpenAIRE |
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