Journal
NANO LETTERS
Volume 15, Issue 2, Pages 1217-1221Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl504332t
Keywords
Near field; energy transfer; hyperbolic metamaterials
Categories
Funding
- US National Science Foundation (NSF) [CBET-1253692]
- US Defense Advanced Research Projects Agency (DARPA) [D14AP00008]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1253692] Funding Source: National Science Foundation
Ask authors/readers for more resources
Although blackbody radiation described by Plancks 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available