A TUNABLE EIGHT-WAVELENGTH TERAHERTZ MODULATOR BASED ON PHOTONIC CRYSTALS
Abstract
We propose a tunable eight-wavelength terahertz modulator based on a structure of triple triangular lattice photonic crystals by using photonic crystals in the terahertz regime. The triple triangular lattice was formed by nesting circular, square, and triangular dielectric cylinders. Three square point defects were introduced into the perfect photonic crystal to produce eight defect modes. GaAs was used as the point defects to realize tunability. We used a structure with a reflecting barrier to achieve modulation at high transmission rate. The insertion loss and extinction ratio were 0.122 and 38.54 dB, respectively. The modulation rate was 0.788 dB. The performance of the eight-wavelength terahertz modulator showed great potential for use in future terahertz communication systems.
About the Authors
K. . Ji
Nanjing University of Posts and Telecommunications
Russian Federation
Russian Federation
H. . Chen
Nanjing University of Posts and Telecommunications
Russian Federation
Russian Federation
W. . Zhou
Nanjing University of Posts and Telecommunications
Russian Federation
Russian Federation
Y. . Zhuang
Nanjing University of Posts and Telecommunications
Russian Federation
Russian Federation
J. . Wang
Nanjing University of Posts and Telecommunications
Russian Federation
Russian Federation
References
1. H. Chon, B. A. Ozan, A. F. Ian, IEEE T. Wirel. Commun., 14, 2402-2412 (2015).
2. J. S. Li, Opt. Laser Technol., 56, 263-268 (2014).
3. T. Chen, P. Liu, J. Liu, Z. Hong, Appl. Phys. B, 115, 105-109 (2014).
4. L. J. Zhou, W. T. Jiang, Commun. Tech., 47, 348-353 (2014).
5. H. M. Chen, J. Su, J. L. Wang, X. Y. Zhao, Opt. Express, 19, 3599-3603 (2014).
6. L. J. Song, H. M. Chen, X. Y. Zhao, J. L. Wang, Stud. Opt. Commun., 38, 42-44 (2012).
7. W. Zhou, H. M. Chen, J. L. Wang, J. Appl. Spectrosc., 82, 788-793 (2015).
8. S. John, Phys. Rev. Lett., 58, 2486 (1987).
9. E. Yablonovitch, Phys. Rev. Lett. , 58, 2059 (1987).
10. H. F. Tiedje, H. K. Haugen, J. S. Preston, P. Soc. Photo-Opt. Ins., 274, 187-197 (2007).
11. P. Kuzel, F. Kadlec, H. Nemec, J. Chem. Phys., 127, 1-11 (2007).
Review
For citations:
Ji K., Chen H., Zhou W., Zhuang Y., Wang J. A TUNABLE EIGHT-WAVELENGTH TERAHERTZ MODULATOR BASED ON PHOTONIC CRYSTALS. Zhurnal Prikladnoii Spektroskopii. 2017;84(5):767-771. (In Russ.)
Views: 224
Email this article 