Related Experiment Video
Updated: Jul 4, 2026
10:26
Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Infrared cloaking based on the electric response of split ring resonators
Boubacar Kanté1, André de Lustrac, Jean-Michel Lourtioz
1Institut d'Electronique Fondamentale, Univ. Paris-Sud, UMR 8622, CNRS, Orsay, F-91405 France.
Optics Express
|June 12, 2008
Summary
This study introduces a novel electromagnetic cloak using the electric response of gold split ring resonators (SRRs) at infrared frequencies. The findings suggest SRRs are versatile building blocks for metamaterials and can be simplified to cut wires for cloaking applications.
Area of Science:
- Metamaterials and Nanophotonics
- Electromagnetic Cloaking
- Infrared Optics
Background:
- Electromagnetic cloaking has been demonstrated using metamaterials with magnetic responses.
- Split ring resonators (SRRs) are key components in metamaterial design.
Purpose of the Study:
- To propose and simulate an electromagnetic cloak utilizing the electric response of gold SRRs.
- To explore the potential of SRRs as universal building blocks for metamaterials.
- To investigate the use of cut wires as simplified elements for approximate cloaking.
Main Methods:
- Numerical simulations at infrared frequencies (~100 THz).
- Design of gold SRRs to exploit electric response.
- Analysis of cloak performance including loss and impedance mismatch.
Main Results:
- Demonstration of an electromagnetic cloak based on the electric response of gold SRRs.
- Achieved low loss and weak impedance mismatch in simulations.
- Showcased the viability of SRRs as versatile metamaterial components.
- Identified simple cut wires as effective replacements for SRRs in approximate cloaks.
Conclusions:
- The electric response of gold SRRs offers a viable alternative for electromagnetic cloaking at infrared frequencies.
- SRRs serve as effective 'universal' atoms for designing advanced metamaterials.
- Approximate electromagnetic cloaks can be constructed using simplified structures like cut wires.
Related Concept Videos
01:12Double Resonance Techniques: Overview
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
01:24Characteristics of Series Resonant Circuit
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
01:21IR Absorption Frequency: Hybridization
Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that stretch at a...
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that stretch at a...
01:04¹³C NMR: ¹H–¹³C Decoupling
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
01:25IR Spectrometers
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
01:10Generating Electromagnetic Radiations
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...