Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Optical activity of metallic helices in the terahertz domain: A theoretical investigation

Abstract : Optical activity in the terahertz spectral domain has recently seen a growing interest, but fine understanding of these phenomena is not yet developed. In this article, we study analytically the response of a metallic helix in the terahertz regime and present a full nonlocal calculation of its chiroptical response. Because we do not use multipolar expansion, this calculation is very general and applies to the case where the helix size is comparable to the wavelength of the light. We calculate the circular birefringence and dichroism in three configurations: propagation along or perpendicular to the helix axis and response of an isotropic distribution of such helices. We obtain analytical expressions and can examine the consequence of the breakdown of the multipolar expansion and the wavelength-dependence of the chiroptical response, as well as give orders of magnitude that compare favorably with experimental data. This calculation is also comforted by a finite element calculation. Cop. 2012 Optical Society of America.
Document type :
Journal articles
Complete list of metadata
Contributor : Denis Roura Connect in order to contact the contributor
Submitted on : Saturday, April 27, 2013 - 10:57:36 AM
Last modification on : Thursday, November 18, 2021 - 3:42:02 PM




François Hache, Guilhem Gallot. Optical activity of metallic helices in the terahertz domain: A theoretical investigation. Journal of the Optical Society of America B, Optical Society of America, 2012, 29 (10), pp.2675-2684. ⟨10.1364/JOSAB.29.002675⟩. ⟨hal-00817150⟩



Record views