Far-field spectral intensity characteristics of a time-dependent gaussian pulse from a circular mask with a linear circular apertures array |
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| Authors: | Pin Han Hone-Ene Hwang |
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| Institution: | aCenter of Nanoscience and Nanotechnology, NCHU, Institute of Precision Engineering, National Chung Hsing University, 250, Kuo Kuang Road, Taichung 402, Taiwan, R.O.C.;bDepartment of Electronic Engineering, Chung Chou Institute of Technology, 6, Lane 2, Section 3, Sunchao Road, Yuanlin 510, Changhua, Taiwan. Taiwan, R.O.C. |
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| Abstract: | The spectral characteristics of a time-dependent Gaussian pulse from a circular mask with a circular apertures array in the far field are theoretically investigated and presented with numerical results. A rigorous treatment, with the Fresnel diffraction integral, to the spectral changes of a time-dependent Gaussian-shaped pulse passing through a circular mask with a linear circular apertures array is given and some properties of the spectral intensity under different situations are provided. Also an accurate and concrete criteria judging the condition for the red shift, blue shift of spectral intensity distributions is obtained as well. |
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| Keywords: | Gaussian pulse circular apertures array Fresnel diffraction integral far-field (Fraunhofer) diffraction spectral intensity |
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