[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.3807/JOSK.2014.18.5.589

Design and Performance Analysis of a Multi Wavelength Terahertz Modulator Based on Triple-Lattice Photonic Crystals

Ji, Ke (Nanjing University of Posts and Telecommunications)
Chen, Heming (Nanjing University of Posts and Telecommunications)
Zhou, Wen (Nanjing University of Posts and Telecommunications)

Publication Information

Journal of the Optical Society of Korea / v.18, no.5, 2014 , pp. 589-593 More about this Journal

Abstract

Terahertz (THz) communication has important applications in high-speed and ultra broadband wireless access networks. The THz modulator is one of the key devices in a THz communications system. Wavelength division multiplexing (WDM) can expand the capacity of THz communications systems, so research on multi wavelength THz modulators has significant value. By combining photonic-crystal and THz technology, a novel type of multi wavelength THz modulator based on a triple-lattice photonic crystal is proposed in this paper. Compared to a compound-lattice photonic crystal, a triple-lattice photonic crystal has a larger gap width of 0.196. Simulation results show that six beams of THz waves can be modulated simultaneously with high performance. This modulator's extinction ratio is as large as 34.25 dB, its insertion loss is as low as 0.147 dB, and its modulation rate is 2.35 GHz.

Keywords

Multi-wavelength; Photonic crystal; THz wave; Triple lattice; Modulator;

Citations & Related Records

Reference

1	J. S. Li and S. Zouhdi, "Ultrafast and low-power terahertz wave modulator based on organic photonic crystal," Opt. Commun. 285, 953-956 (2012). DOI ScienceOn
2	J. S. Li, "Terahertz modulator using photonic crystals," Opt. Commun. 269, 98-101 (2007). DOI ScienceOn
3	E. Yablonovitch, "Inhibited spontaneous emission in solid-state physics and electronics," Phys. Rev. Lett. 58, 2059 (1987). DOI ScienceOn
4	S. John, "Strong localization of photons in certain disordered dielectric super lattices," Phys. Rev. Lett. 58, 2486 (1987). DOI ScienceOn
5	M. Notomi, A. Shinya, S. Mitsugi, G. Kira, E. Kuramochi, and T. Tanabe, "Optical bistable switching action of Si high-Q photonic-crystal nanocavities," Opt. Express 13, 2678-2687 (2005). DOI
6	T. Chen, P. Liu, J. Liu, and Z. Hong, "A terahertz photonic crystal cavity with high Q-factors," Appl. Phys. B 115, 105-109 (2014).
7	H. F. Tiedje, H. K. Haugen, and J. S. Preston, "Measurement of nonlinear absorption coefficients in $G_aA_s.\;I_nP$ , and $S_i$ by an optical pump THz probe technique," Opt. Commun. 274, 187-197 (2007). DOI ScienceOn
8	L. Fekete, F. Kadlec, and P. Kuzel, "Ultrafast opto-terahertz photonic crystal modulator," Opt. Lett. 32, 680-682 (2007). DOI ScienceOn
9	M. Rahm, J. S. Li, and W. J. Padilla, "THz wave modulators: A brief review on different modulation techniques," J. Infrared Milli. Terahz. Waves 34, 1-27 (2013). DOI
10	H. M. Chen, J. Su, J. L. Wang, and X. Y. Zhao, "Optically-controlled high-speed terahertz wave modulator based on nonlinear photonic crystals," Opt. Express 19, 3599-3603 (2011). DOI
11	L. Fekete, F. Kadlec, H. Nemec, and P. Kuzel, "Fast one-dimensional photonic crystal modulators for the terahertz range," Opt. Express 15, 8898-8912 (2007). DOI
12	H. C. Nguyen, Y. Sakai, M. Shinkawa, N. Ishikura, and T. Baba, "10Gb/s operation of photonic crystal silicon optical modulator," Opt. Express 19, 13000-13007 (2011). DOI
13	T. D. J. Li, and H. M. Chen, "Terahertz wave tunable resonator based on compound lattice photonic crystal," in Proc. The 9th International Conference on Optical Communication and Networks (ICOCN, China, Oct. 2010), pp. 402-405.
14	W. Zhou and H. M. Chen, "Study on the characteristics of quadruple-wavelength THz modulator based on compound lattice photonic crystal with direct-coupled structure," in Proc. The 2013 International Conference on Communication Technology (ICCT, Singapore, 2013), pp. 821-830.
15	A. Figotin, Y. A. Godin, and I. Vitebsky, "Two-dimensional tunable photonic crystals," Phys. Rev. B 57, 2841-2848 (1998).