| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Narrow-Band Thermal Radiation Based on Microcavity Resonant Effect |
| HUANG Jin-Guo1, XUAN Yi-Min1,2**, LI Qiang1 |
1School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094
2School of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
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| Cite this article: |
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HUANG Jin-Guo, XUAN Yi-Min, LI Qiang 2014 Chin. Phys. Lett. 31 094207 |
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Abstract The microcavity resonant effect is used to realize narrow-band thermal radiation. Periodic circular aperture arrays with square lattice are patterned on Si substrates by using standard photolithographic techniques and reactive ion etching techniques. Ag films are deposited on the surface of Si substrates with aperture arrays to improve the infrared reflectance. On the basis of the micromachining process, an Ag/Si structured surface exhibiting narrow-band radiation and directivity insensitivity is presented. The emittance spectra exhibit several selective emittance bands attributed to the microcavity resonance effect. The dependence of emittance spectra on sizes and direction is also experimentally examined. The results indicate that the emittance peak of the Ag/Si structured surface can be modulated by tailoring the structural sizes. Moreover, the emittance peak is independent of the radiant angle, which is very important for designing high-performance thermal emitters.
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Published: 22 August 2014
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| PACS: |
42.25.Bs
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(Wave propagation, transmission and absorption)
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42.50.St
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(Nonclassical interferometry, subwavelength lithography)
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42.50.Wk
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(Mechanical effects of light on material media, microstructures and particles)
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44.40.+a
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(Thermal radiation)
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