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Broadening of Non-Transmission Band of Ultra-Narrow Band-Pass Filters Using Heterostructures |
WANG Li1;WANG Zhan-Shan1;SANG Tian1;WU Yong-Gang1;CHEN Ling-Yan1,
LIU Hua-Song2;JI Yi-Qin2 |
| 1Institute of Precision Optical Engineering, Department of Physics, Tongji University, Shanghai 2000922Tianjin Jinhang Institute of Technology Physics, Tianjin 300192 |
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| Cite this article: |
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WANG Li, WANG Zhan-Shan, SANG Tian et al 2008 Chin. Phys. Lett. 25 2030-2032 |
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Abstract Transmission characteristics are studied for the hybrid structures combining defect and multiple heterostructures. It is shown that the non-transmission frequency range can be substantially enlarged and the phenomenon of narrow band-pass filter can be realized by adjusting the number, position and size of the defect. The theoretical and experimental results on heterostructures containing Ta2O5/SiO2 multilayer films are presented. With
perfect non-transmission frequency range and high peak transmissivity, this structure opens a promising way to fabricate ultra-narrow band-pass filters with wide non-transmission frequency range.
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| Keywords:
42.25.Bs
42.79.Wc
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Received: 26 November 2007
Published: 31 May 2008
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| PACS: |
42.25.Bs
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(Wave propagation, transmission and absorption)
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42.79.Wc
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(Optical coatings)
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