Terahertz metamaterial with asymmetric transmission
Top Cited Papers
- 27 October 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 80 (15), 153104
- https://doi.org/10.1103/physrevb.80.153104
Abstract
We show that a planar metamaterial, an array of coupled metal split-ring resonators with a unit cell lacking mirror symmetry, exhibits asymmetric transmission of terahertz radiation (0.25–2.5 THz) propagating through it in opposite directions. This intriguing effect, that is compatible with Lorentz reciprocity and time reversal, depends on a directional difference in conversion efficiency of the incident circularly polarized wave into one of opposite handedness, that is only possible in lossy low-symmetry planar chiral metamaterials. We show that asymmetric transmission is linked to excitation of enantiomerically sensitive plasmons, these are induced charge-field excitations that depend on the mutual handedness of incident wave and metamaterial pattern. Various bands of positive, negative and zero phase and group velocities have been identified indicating the opportunity to develop polarization sensitive negative index and slow light media based on such metamaterials.Keywords
Other Versions
This publication has 26 references indexed in Scilit:
- Extrinsic electromagnetic chirality in metamaterialsJournal of Optics A: Pure and Applied Optics, 2009
- Planar metamaterial with transmission and reflection that depend on the direction of incidenceApplied Physics Letters, 2009
- Nanostructured Metal Film with Asymmetric Optical TransmissionNano Letters, 2008
- Asymmetric Transmission of Light and Enantiomerically Sensitive Plasmon Resonance in Planar Chiral NanostructuresNano Letters, 2007
- Active terahertz metamaterial devicesNature, 2006
- Asymmetric Propagation of Electromagnetic Waves through a Planar Chiral StructurePhysical Review Letters, 2006
- Terahertz Response of a Microfabricated Rod–Split-Ring-Resonator Electromagnetic MetamaterialPhysical Review Letters, 2005
- Magnetic Response of Metamaterials at 100 TerahertzScience, 2004
- Terahertz Magnetic Response from Artificial MaterialsScience, 2004
- Materials for terahertz science and technologyNature Materials, 2002