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Title: The Proposed Necessary and Sufficient Condition for Spectral Switches with Concave Reflectance of Aluminum Metal
Authors: Pin Han
Cheng-Mu Tsai
Hung-Bin Lee
Contributors: 國立臺灣海洋大學:光電與材料科技學系
Keywords: Spectral switches
strictly concave function with a minimum
spectral shift amplification
polarization-controlled method
Date: 2017-11
Issue Date: 2018-08-20T02:47:21Z
Publisher: Advances in Mechanical Engineering
Abstract: Abstract: Spectral switches have been widely studied, and many related applications and phenomena were proposed or verified. However, the conditions under which spectral switches can be found are not completely specified. In the past, the zero-intensity components or phase singularities are used as the sufficient conditions for spectral switches. Some kind of oscillatory behavior in the modifier function is also proposed to be the necessary condition for it. In this work, we suggest that the necessary and sufficient condition can be reduced to a simple condition: a strictly concave modifier with a minimum. An example with this condition is given using the reflectance of aluminum in the visible to near-infrared range. This result clarifies the conditions for spectral switches and helps identifying it under different circumstances in the future. The related spectral shift amplification and polarization–controlled spectral shift effect are also presented.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/48237
Appears in Collections:[光電科學研究所] 期刊論文

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