Ultrafast terahertz electric field polarization dynamics in metallic metastructures

K. J. Chau; M. C. Quong; A. Y. Elezzabi

doi:10.1117/12.699232

8 February 2007 Ultrafast terahertz electric field polarization dynamics in metallic mesostructures

K. J. Chau, M. C. Quong, A. Y. Elezzabi

Proceedings Volume 6471, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XI and Semiconductor Photodetectors IV; 64710P (2007) https://doi.org/10.1117/12.699232
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

In this work, we explore the interaction of terahertz electromagnetic pulses with chiral metallic mesostructures. In contrast to conventional continuous wave experiments conducted in the visible and microwave regimes, time-domain THz spectroscopy enables direct measurement of the electric field and polarization dynamics of electromagnetic waves propagated through the chiral structure. With this experimental methodology, we discover significant polarization circularization of the radiation scattered from a sub-wavelength sized helix in the axial configuration. Numerical simulations are in excellent quantitative agreement with the experimental results. Understanding light behaviour in a helical structure is not only of fundamental significance, but could potentially lead to the development of entirely new materials to improve communication and information technology.

Citation Download Citation

K. J. Chau, M. C. Quong, and A. Y. Elezzabi "Ultrafast terahertz electric field polarization dynamics in metallic mesostructures", Proc. SPIE 6471, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XI and Semiconductor Photodetectors IV, 64710P (8 February 2007); https://doi.org/10.1117/12.699232

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