Showing papers by "Olivier J. F. Martin published in 2002"
TL;DR: In this article, the electromagnetic resonances in split ring resonators (SRRs) around 1 GHz were investigated and it was shown that both electric and magnetic fields can induce resonances, the magnetic one being the strongest.
Abstract: We study experimentally and numerically the electromagnetic resonances in split ring resonators (SRRs), around 1 GHz. For an individual SRR, we show that both electric and magnetic fields can induce resonances, the magnetic one being the strongest. The utilization of such resonant structures as efficient microwave filter is also demonstrated. The coupling between two or more SRRs can be quite complex and strongly depends on their geometrical arrangement. For small separation distances, very strong coupling, leading to sharp resonances with high quality factors are observed. In that case a magnetic field circulation which connects neighboring elements is established. The practical implications of these results for the fabrication of a left-handed metamaterial are discussed.
435 citations
TL;DR: In this article, a three-dimensional magnetic resonator structure with high isotropy was constructed by crossed split-ring resonators and has a response independent of the illumination direction in a specific plane.
Abstract: We study experimentally and numerically a novel three-dimensional magnetic resonator structure with high isotropy. It is formed by crossed split-ring resonators and has a response independent of the illumination direction in a specific plane. The utilization of such elements to build a finite left-handed medium is discussed.
103 citations
TL;DR: Aluminium roughness has a dramatic impact on the emission characteristics of a near‐field probe and in particular on its polarization sensitivity, and apertureless or scattering probes appear to be less sensitive to roughness.
Abstract: We study the influence of metal roughness on the near-field distribution generated by an aperture or an apertureless (scattering) probe. Different experimental parameters are investigated: roughness magnitude, aperture form, distribution of the roughness. Our results show that aluminium roughness has a dramatic impact on the emission characteristics of a near-field probe and in particular on its polarization sensitivity. Apertureless or scattering probes appear to be less sensitive to roughness and to provide a well confined field even with a somewhat rough probe.
42 citations
TL;DR: In this paper, the response of three-dimensional arrays of microscopic wires was studied experimentally and it was shown that such a system can be considered as an effective plasmonic medium with a specific plasma frequency.
Abstract: We study experimentally the response of three-dimensional arrays of microscopic wires. Very good agreement is found with previous theoretical work indicating that such a system can be considered as an effective plasmonic medium with a specific plasma frequency. The sample size threshold where this effective behavior appears is shown to be relatively small.
40 citations
TL;DR: In this paper, the authors describe a library to compute various types of Green's tensors for three-dimensional electromagnetic scattering calculations, including the retarded and non-retarded (quasi-static) Green tensors.
23 citations
01 Oct 2002
TL;DR: In this article, the electromagnetic resonances in split ring resonators S(SRRs) around 1GHz were studied experimentally and numerically, and it was shown that both electric and magnetic fields can induce resonances, the magnetic one being the strongest.
Abstract: We study experimentally and numerically the electromagnetic resonances in split ring resonators S(SRRs), around 1GHz. For an individual anisotropic SRR, we show that both electric and magnetic fields can induce resonances, the magnetic one being the strongest. This behaviour leads to an anisotropic response of the SRR, which depends on the illumination direction. The coupling between two or more SRRs can be quite complex and strongly depends on their geometrical arrangement. Finally we propose and study an alternative magnetic resonant structure with a higher degree of isotropy.
1 citations