JOURNAL ARTICLE

Broadband directional thermal radiator with flexible intensity–directivity tunability in the whole visible spectrum.

  • Published In: Applied Physics Letters, 2023, v. 123, n. 2. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Wang, Cun-Hai; Liu, Ming-Xiang; Pan, Chong-Chao; Jiang, Ze-Yi 3 of 3

Abstract

The article focuses on the design of a broadband directional (BBD) thermal radiator operating in the visible spectrum (0.4–0.8 μm) using periodic germanium (Ge) strips on a silver (Ag) substrate. Leveraging light-trapping effects, the structure achieves strong, low-dispersive emissivity concentrated at large zenith angles (~75°), with tunable emission intensity and directionality controlled by grating parameters such as strip height. Unlike previous designs limited to narrowband or infrared ranges, this radiator offers broadband directional thermal emission without complex nanofabrication, making it a promising candidate for applications in thermal management, camouflage, and solar energy harvesting.

Additional Information

  • Source:Applied Physics Letters. 2023/07, Vol. 123, Issue 2, p1
  • Document Type:Article
  • Subject Area:Science
  • Publication Date:2023
  • ISSN:0003-6951
  • DOI:10.1063/5.0156810
  • Accession Number:164938004
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