A microscale-structured surface consisting of heavily doped silicon rectangle grating and slotted silver layer is studied for omnidirectional narrowband emitter. Numerical simulation is implemented to obtain spectral emittance in mid-infrared region (6–16 μm) for the transverse magnetic incidence by using the rigorous coupled-wave analysis (RCWA) method. The effects of structural parameters and incident angle on its spectral emittance are investigated. In virtue of the microcavity effect, an omnidirectional narrowband emitter is proposed. By selecting a group of structural parameters, its peak emittance reaches as high as 0.998, and the peak width Δλ/λ of the emittance peak is as narrow as 0.03 at the specified wavelength. The results reveal that our proposed structured surface has the nice spectral features of angular uniformity and wavelength-selective characteristic, which can be applied to design novel narrowband thermal emitters and detectors in the infrared region.
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e-mail: ymxuan@mail.njust.edu.cn
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Radiative Heat Transfer
Spectral Features of an Omnidirectional Narrowband Emitter
Yutao Zhang,
Yutao Zhang
School of Energy and Power Engineering, Nanjing University of Science & Technology, Nanjing 210094,
China
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Yimin Xuan
Yimin Xuan
School of Energy and Power Engineering, Nanjing University of Science & Technology, Nanjing 210094,
e-mail: ymxuan@mail.njust.edu.cn
China
Search for other works by this author on:
Yutao Zhang
School of Energy and Power Engineering, Nanjing University of Science & Technology, Nanjing 210094,
China
Yimin Xuan
School of Energy and Power Engineering, Nanjing University of Science & Technology, Nanjing 210094,
China
e-mail: ymxuan@mail.njust.edu.cn
J. Heat Transfer. Oct 2012, 134(10): 102701 (7 pages)
Published Online: August 7, 2012
Article history
Received:
March 23, 2011
Revised:
January 12, 2012
Published:
August 6, 2012
Online:
August 7, 2012
Citation
Zhang, Y., and Xuan, Y. (August 7, 2012). "Spectral Features of an Omnidirectional Narrowband Emitter." ASME. J. Heat Transfer. October 2012; 134(10): 102701. https://doi.org/10.1115/1.4006156
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