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Spectral Control of Near-Field Thermal Radiation With Periodic Cross Resonance Metasurfaces
KTH, School of Electrical Engineering and Computer Science (EECS), Electromagnetic Engineering.ORCID iD: 0000-0002-3401-1125
2018 (English)In: IEEE Journal of Quantum Electronics, ISSN 0018-9197, E-ISSN 1558-1713, Vol. 54, no 1, article id 7000107Article in journal (Refereed) Published
Abstract [en]

Near-field thermal spectra can be engineered using periodic cross resonance metasurfaces. Structures consisting of single crosses, double crosses, and multiple crosses are proposed to control the spectral heat flux from narrow band to broadband with the Fabry-Perot-cavity-like effect and the interaction between the emitter and receiver. Radiation peaks originating from the cross structures split into two adjacent peaks in the near-field, due to the separate contributions of s- and p-polariton modes. Their frequency can be manipulated by adjusting the length of the crosses. Multiple radiation peaks can be generated by double crosses, and due to the strong coupling of resonance modes, multiple crosses can yield a broadband thermal spectrum ranging from 100-180 THz, with the total heat flux two orders of magnitude above the blackbody limit. The inherent physical mechanisms are illustrated by analyzing the energy transmission coefficients of the cross structures. The features of the radiation peaks and spectra are robust to the change of the gap distance or the temperature, which is advantageous for both the experimental design and fabrication of thermal radiation devices.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018. Vol. 54, no 1, article id 7000107
Keyword [en]
Near-field, thermal radiation spectrum, optical resonance, periodic structures
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-222412DOI: 10.1109/JQE.2018.2791639ISI: 000423191500001Scopus ID: 2-s2.0-85041112109OAI: oai:DiVA.org:kth-222412DiVA, id: diva2:1186313
Note

QC 20180228

Available from: 2018-02-28 Created: 2018-02-28 Last updated: 2018-05-24Bibliographically approved

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