ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Spectral enhancement of thermal radiation by laser fabricating grating structure on nickel surface |
Liu Song (刘嵩), Liu Shi-Bing (刘世炳) |
Strong-Field and Ultrafast Photonics Laboratory, Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China |
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Abstract Previous studies have shown some correlations between the optical properties of objects and their surface patterns. We fabricate tens of micrometer period gratings by femtosecond laser direct writing technology on polished nickel targets and measure their thermal radiation spectra at a temperature of 623 K by Fourier transform infrared (FTIR) spectrometry. The results show an obvious major enhanced peak in which the wavelength is slightly larger than the grating period. Surface plasmon resonance (SPR) and Kirchhoff's law of thermal radiation are applied to give this phenomenon a preliminary explanation. In addition, we utilized rigorous coupled wave analysis (RCWA) to simulate the absorption spectrum of the grating surface. The experiment results show good agreement with the simulation results.
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Received: 10 October 2014
Revised: 20 November 2014
Accepted manuscript online:
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PACS:
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44.40.+a
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(Thermal radiation)
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42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51275012). |
Corresponding Authors:
Liu Shi-Bing
E-mail: sbliu@bjut.edu.cn
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About author: 44.40.+a; 42.60.Da; 78.20.Ci |
Cite this article:
Liu Song (刘嵩), Liu Shi-Bing (刘世炳) Spectral enhancement of thermal radiation by laser fabricating grating structure on nickel surface 2015 Chin. Phys. B 24 054401
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