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Magnetically Tunable Terahertz Switch and Band-Pass Filter |
| ZHANG Hui1, GUO Peng1, CHANG Sheng-Jiang1, YUAN Jing-He2 |
| 1Institute of Modern Optics, Nankai University, Tianjin 3000712Institute of Science and Technology for Opto-Electron Information, Yantai University, Yantai 264005 |
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| Cite this article: |
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ZHANG Hui, GUO Peng, CHANG Sheng-Jiang et al 2008 Chin. Phys. Lett. 25 3898-3900 |
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Abstract A novel design of a tunable terahertz switch and band-pass filter using liquid-crystal-filled photonic crystal waveguide is demonstrated. The effects of magnetic field on the photonic bandgaps and transmitting properties of a THz wave are investigated by using the plane wave expansion method and finite difference time domain method. The efficient photonic bandgap tuning is predicted such that the two-dimensional liquid-crystal-filled photonic crystal waveguide can serve as a switch and continuously tunable band-pass filter with controlling of the magnetic field.
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| Keywords:
07.57.Hm
42.70.Qs
42.79.Ci
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Received: 25 June 2008
Published: 25 October 2008
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| PACS: |
07.57.Hm
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(Infrared, submillimeter wave, microwave, and radiowave sources)
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42.70.Qs
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(Photonic bandgap materials)
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42.79.Ci
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(Filters, zone plates, and polarizers)
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[1] Wang W N et al 2007 Acta Phys. Sin. 56 781
[2] Pickwell E, and Wallace V P 2006 Appl. Phys.
39 301
[3] Chen H T et al 2006 Nature 444 597
[4] Ning L et al 2005 Opt. Express 13 6750
[5] Pan C L et al 2005 Opt. Express 13 3921.
[6] Drysdale T D et al 2004 Appl. Phys. Lett. 85
5173
[7] Tsai T R, Chen C Y, Pan R P, Pan C L and Zhang X C 2004
IEEE Microwave Wireless Comp. Lett. 14 77
[8] Chen C Y et al 2004 Opt. Express 12 2630
[9] Chen C Y et al 2006 Appl. Phys.Lett. 88 101107
[10] Lin C et al 2004 Opt. Express 12 5723
[11] Li J, He J and Hong Z 2007 Appl. Opt. 46 5034
[12] Wang X J 2006 Liquid Crystal Optics and Liquid
Crystal Display (Beijing: Science Press) pp 60 37 (in Chinese) |
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