ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Broadband and high efficiency metal multi-layer dielectric grating based on non-quarter wave coatings as reflective mirror |
Zhang Wen-Fei (张文飞)a b, Kong Wei-Jin (孔伟金)a b, Yun Mao-Jin (云茂金)a b, Liu Jun-Hai (刘均海)a b, Sun Xin (孙欣)a b |
a College of Physics Science, Qingdao University, Qingdao 266071, China; b Key Laboratory of Photonics Materials and Technology in Universities of Shandong (Qingdao University),Qingdao 266071, China |
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Abstract This article deals with designing broadband and high efficiency metal multi-layer dielectric grating (MMDG) used to compress and stretch ultra-short laser pulse. The diffraction characteristics of MMDG are analysed with the method of rigorous coupled-wave method. The multi-layer dielectric used as reflective mirror is made up of non-quarter wave coatings. Taking the diffraction efficiency of the -1 order as the value of merit function, the parameters such as groove depth, residual thickness, duty cycle, and reflective mirror are optimized to obtain broadband and high diffraction efficiency. The optimized MMDG shows an ultra-broadband working spectrum with the average efficiency exceeding 97% over 160 nm wavelength centred at 1053 nm and TE polarization. The optimized MMDG should be useful for chirped pulse amplification.
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Received: 12 January 2012
Revised: 13 February 2012
Accepted manuscript online:
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PACS:
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42.79.Dj
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(Gratings)
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42.79.-e
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(Optical elements, devices, and systems)
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61.05.J-
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(Electron diffraction and scattering)
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46.40.Cd
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(Mechanical wave propagation (including diffraction, scattering, and dispersion))
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Fund: Project supported by the Program of Qingdao Municipal Science and Technology Bureau, China (Grant No. 12-1-4-2-(15)-jch), the National Natural Science Foundation of China (Grant Nos. 10804060 and 10904080), and the Taishan Scholars Program of Shandong Province, China. |
Corresponding Authors:
Kong Wei-Jin
E-mail: kwjsd@163.com
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Cite this article:
Zhang Wen-Fei (张文飞), Kong Wei-Jin (孔伟金), Yun Mao-Jin (云茂金), Liu Jun-Hai (刘均海), Sun Xin (孙欣) Broadband and high efficiency metal multi-layer dielectric grating based on non-quarter wave coatings as reflective mirror 2012 Chin. Phys. B 21 094218
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