Narrow-Band Thermal Radiation Based on Microcavity Resonant Effect

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 subst...

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Bibliographic Details
Published inChinese physics letters Vol. 31; no. 9; pp. 79 - 82
Main Author 黄金国 宣益民 李强
Format Journal Article
LanguageEnglish
Published 01.09.2014
Subjects
Si衬底
共振效应
发射率光谱
微腔
热辐射
窄带
红外反射率
结构表面
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Summary: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 therma/emitters.
Bibliography: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 therma/emitters.
11-1959/O4
HUANG Jin-Guo, XUAN Yi-Min, LI Qiang（ 1 School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094 2. School of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016）
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/9/094207