Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/108726
Title: | Overcoming black body radiation limit in free space: metamaterial superemitter | Authors: | Maslovski, Stanislav I. Simovski, Constantin R Tretyakov, Sergei A |
Issue Date: | 2016 | Publisher: | Institute of Physics Publishing | Project: | Investigador FCT (2012) grant (Ref. IF/01740/2012/CP0166/CT0002) | Serial title, monograph or event: | New Journal of Physics | Volume: | 18 | Issue: | 1 | Abstract: | Here, we demonstrate that the power spectral density of thermal radiation at a specific wavelength produced by a body of finite dimensions set up in free space under a fixed temperature could be made theoretically arbitrary high, if one could realize double negative metamaterials with arbitrary small loss and arbitrary high absolute values of permittivity and permeability (at a given frequency). This result refutes the widespread belief that Planck’s law itself sets a hard upper limit on the spectral density of power emitted by a finite macroscopic body whose size is much greater than the wavelength. Here we propose a physical realization of a metamaterial emitter whose spectral emissivity can be greater than that of the ideal black body under the same conditions. Due to the reciprocity between the heat emission and absorption processes such cooled down superemitter also acts as an optimal sink for the thermal radiation—the ‘thermal black hole’—which outperforms Kirchhoff–Planck’s black body which can absorb only the rays directly incident on its surface. The results may open a possibility to realize narrowband super-Planckian thermal radiators and absorbers for future thermophotovoltaic systems and other devices. | URI: | https://hdl.handle.net/10316/108726 | ISSN: | 1367-2630 | DOI: | 10.1088/1367-2630/18/1/013034 | Rights: | openAccess |
Appears in Collections: | I&D IT - Artigos em Revistas Internacionais FCTUC Eng.Electrotécnica - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Overcoming-black-body-radiation-limit-in-free-space-Metamaterial-superemitterNew-Journal-of-Physics.pdf | 1.94 MB | Adobe PDF | View/Open |
Page view(s)
66
checked on Sep 25, 2024
Download(s)
50
checked on Sep 25, 2024
Google ScholarTM
Check
Altmetric
Altmetric
This item is licensed under a Creative Commons License