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Title: Far-field coherent thermal emission from polaritonic resonance in individual anisotropic nanoribbons

Abstract

Coherent thermal emission deviates from the Planckian blackbody emission with a narrow spectrum and strong directionality. While far-field thermal emission from polaritonic resonance has shown the deviation through modelling and optical characterizations, an approach to achieve and directly measure dominant coherent thermal emission has not materialised. By exploiting the large disparity in the skin depth and wavelength of surface phonon polaritons, we design anisotropic SiO2 nanoribbons to enable independent control of the incoherent and coherent behaviours, which exhibit over 8.5-fold enhancement in the emissivity compared with the thin-film limit. Importantly, this enhancement is attributed to the coherent polaritonic resonant effect, hence, was found to be stronger at lower temperature. A thermometry platform is devised to extract, for the first time, the thermal emissivity from such dielectric nanoemitters with nanowatt-level emitting power. The result provides new insight into the realisation of spatial and spectral distribution control for far-field thermal emission.

Authors:
 [1];  [2];  [3]; ORCiD logo [1]
  1. Univ. of California, San Diego, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1529981
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Shin, Sunmi, Elzouka, Mahmoud, Prasher, Ravi, and Chen, Renkun. Far-field coherent thermal emission from polaritonic resonance in individual anisotropic nanoribbons. United States: N. p., 2019. Web. doi:10.1038/s41467-019-09378-5.
Shin, Sunmi, Elzouka, Mahmoud, Prasher, Ravi, & Chen, Renkun. Far-field coherent thermal emission from polaritonic resonance in individual anisotropic nanoribbons. United States. doi:10.1038/s41467-019-09378-5.
Shin, Sunmi, Elzouka, Mahmoud, Prasher, Ravi, and Chen, Renkun. Tue . "Far-field coherent thermal emission from polaritonic resonance in individual anisotropic nanoribbons". United States. doi:10.1038/s41467-019-09378-5. https://www.osti.gov/servlets/purl/1529981.
@article{osti_1529981,
title = {Far-field coherent thermal emission from polaritonic resonance in individual anisotropic nanoribbons},
author = {Shin, Sunmi and Elzouka, Mahmoud and Prasher, Ravi and Chen, Renkun},
abstractNote = {Coherent thermal emission deviates from the Planckian blackbody emission with a narrow spectrum and strong directionality. While far-field thermal emission from polaritonic resonance has shown the deviation through modelling and optical characterizations, an approach to achieve and directly measure dominant coherent thermal emission has not materialised. By exploiting the large disparity in the skin depth and wavelength of surface phonon polaritons, we design anisotropic SiO2 nanoribbons to enable independent control of the incoherent and coherent behaviours, which exhibit over 8.5-fold enhancement in the emissivity compared with the thin-film limit. Importantly, this enhancement is attributed to the coherent polaritonic resonant effect, hence, was found to be stronger at lower temperature. A thermometry platform is devised to extract, for the first time, the thermal emissivity from such dielectric nanoemitters with nanowatt-level emitting power. The result provides new insight into the realisation of spatial and spectral distribution control for far-field thermal emission.},
doi = {10.1038/s41467-019-09378-5},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {3}
}

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