Partially Spatial Coherent Thermal Emitter Based on an Epsilon-and-mu-near-zero Metamaterial

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The accidental Dirac cone of a photonic crystal allows the realization of a low loss dielectric metamaterial with simultaneous near-zero effective permittivity and permeability. The resulting zero refractive index allowed applications that require unique spatial coherency. While most thermal light sources were considered highly incoherent, structurally engineered thermal emitters have achieved relatively high spatial coherency. Here, we propose an epsilon-and-mu-near-zero metamaterial as a spatial coherency converter for thermal emissions, and experimentally demonstrate surface-normal directional emissions with an angular width of 20 degrees.
Publisher
KOREAN PHYSICAL SOC
Issue Date
2020-05
Language
English
Article Type
Article
Citation

JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.76, no.10, pp.889 - 894

ISSN
0374-4884
DOI
10.3938/jkps.76.889
URI
http://hdl.handle.net/10203/282035
Appears in Collection
ME-Journal Papers(저널논문)
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