1Institute of Modern Optics, Nankai University, Tianjin 3000712Institute of Science and Technology for Opto-Electron Information, Yantai University, Yantai 264005
Magnetically Tunable Terahertz Switch and Band-Pass Filter
1Institute of Modern Optics, Nankai University, Tianjin 3000712Institute of Science and Technology for Opto-Electron Information, Yantai University, Yantai 264005
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.
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.
[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)
2008, Vol. 25 
