Chirality Analysis on a Square Chiral Metamaterial

Abstract:

We have analyzed the chirality of terahertz (THz) wave emission from a square chiral metamaterial. The sample was manufactured with a periodic structure formed by a square pattern of chiral with different depth on a silver film. We have yield the specific polarization rotation in the THz region when the THz wave is emitted from a square chiral metamaterial. The THz emissions from these chiral metamaterials were elliptic polarization. A square chiral metamaterial was shown circular dichroism and optical activity properties at different frequencies. The ellipticity and rotation angle will reach a maximum value at a frequency of 1.2 THz and 0.6 THz, respectively. The results were indicated the possibility to controlled the polarization with chiral metamaterial structures.

• Periodical: Materials Science Forum (Volume 901)
• Pages: 65-68
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.901.65
• Online since: July 2017
• Authors: Juliasih Partini*, Kamsul Abraha, Arief Hermanto
• Keywords: Chirality, Metamaterial, Terahertz

References

[1] Pendry, J.B., A Chiral Route to Negative Refraction, Science, 306 (2004) 1353-1355.

DOI: 10.1126/science.1104467

[2] Zhang, S., Park, Y.S., Li, J., Lu, X., Zhang, W., and Zhang, X., Negative Refractive Index in Chiral Metamaterials, Phys. Rev. Lett. 102 (2009) 02391.

DOI: 10.1103/physrevlett.102.023901

[3] Li, Z., Alici, K. B., Caylayan, H., Kafesaki, M., Soukoulis, C. M., and Ozbay, E., Composite chiral metamaterials with negative refractive index and high values of the figure of merit, Optic Express, 20 (2012) 6146-6156.

DOI: 10.1364/oe.20.006146

[4] Kanda, N., Konishi, K., and Kuwata-Gonokami, M., Terahertz wave polarization rotation with double layered metal grating of complimentary chiral patterns, Optics Express, 15 (2007) 11117-11121.

DOI: 10.1364/oe.15.011117

[5] Mittleman, D. M., Cunningham, J., Nuss, M. C., and Geva, M., Noncontact semiconductor wafer characterization with the terahertz Hall effect, Appl. Phys. Lett. 71 (1997) 16-18.

DOI: 10.1063/1.119456

[6] Nagai, N., Kumazawa, R., and Fukuyama, R, Direct evidence of inter-molecular vibrations by THz spectroscopy, Chem. Phys. Lett. 413 (2005) 495-500.

DOI: 10.1016/j.cplett.2005.08.023

[7] Köhler, R., Tredicucci, A., Beltram, F., Beere, H. E., Linfield, E. H., Davies, A. G., Ritchie, D. A., Iotti, R C., and Rossi, F., Terahertz semiconductor-heterostructure laser, Nature 417 (2003) 156-159.

DOI: 10.1038/417156a

[8] Ma, X., Huang, C., Pu, M., Wang, Y., and Luo, X., Circular Dichroism and optical rotation in twisted Y-shaped chiral metamaterial, Applied Physics Express 6, 3 (2013) 022001.

DOI: 10.7567/apex.6.022001

[9] Zhao, R., Katsarakis, N., Kafesaki, M., Soukoulis, C. M., and Economou, E. N., Optically controllable THz chiral metamaterials, Optics Express 22 (2014) 12149.

DOI: 10.1364/oe.22.012149

[10] Hannam, K., Powell, D. A., Shadrivov, I. V., and Kivshar, Y. S., Broadband chiral metamaterials with large optical activity, Phys. Rev. B 89 (2014) 125105.

DOI: 10.1103/physrevb.89.125105