Magnetic Response of Metamaterials at 100 Terahertz

2004/11/18 by Stefan Lindén, Stefan Linden, C. Enkrich +5 · 1,512 citations
Engineering · Materials Science · #Advanced Antenna and Metasurface Technologies #Atomic physics #Capacitance #Capacitor #Condensed matter physics #Dielectric #Electric field #Excitation #Magnetic field #Materials science #Metamaterial #Metamaterials and Metasurfaces Applications #Negative refraction #Nuclear magnetic resonance #Optics #Optoelectronics #Permittivity #Physics #Plasmonic and Surface Plasmon Research #Resonance (particle physics) #Terahertz radiation #Voltage

paper · open access · doi:10.1126/science.1105371

published in Science 306(5700), 1351-1353 (American Association for the Advancement of Science)

openalex publication_date 2004/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/26

Abstract

An array of single nonmagnetic metallic split rings can be used to implement a magnetic resonance, which arises from an inductor-capacitor circuit (LC) resonance, at 100-terahertz frequency. The excitation of the LC resonance in the normal-incidence geometry used in our experiments occurs through the coupling of the electric field of the incident light to the capacitance. The measured optical spectra of the nanofabricated gold structures come very close to the theoretical expectations. Additional numerical simulations show that our structures exhibit a frequency range with negative permeability for a beam configuration in which the magnetic field couples to the LC resonance. Together with an electric response that has negative permittivity, this can lead to materials with a negative index of refraction.

Citations

• Terahertz Magnetic Response from Artificial Materials
• Metamaterials and Negative Refractive Index

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