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Related Concept Videos

Double Resonance Techniques: Overview01:12

Double 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.
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Parallel Resonance

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Design Example: Underdamped Parallel RLC Circuit01:17

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Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials
10:28

Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials

Published on: March 23, 2017

Phase modulation using dual split ring resonators.

Iftekhar Mirza1, Shouyuan Shi, Dennis W Prather

  • 1Dept of Electrical and Computer Engineering, University of Delaware, Delaware 19716, USA. iomirza@udel.edu

Optics Express
|April 1, 2009
PubMed
Summary
This summary is machine-generated.

This study demonstrates phase modulation using thin dual split ring resonator (DSRR) metamaterials. Switching DSRR states achieved significant phase changes (70-80 degrees) with high transmission, validated by simulations.

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Area of Science:

  • Electromagnetics and Metamaterials
  • Applied Physics

Background:

  • Metamaterials offer unique electromagnetic properties.
  • Phase modulation is crucial for advanced wave manipulation.

Purpose of the Study:

  • To numerically investigate phase modulation using stacked dual split ring resonator (DSRR) metamaterials.
  • To demonstrate effective phase control by altering the metamaterial's effective index.

Main Methods:

  • Numerical simulations of vertical and planar DSRR structures.
  • Switching DSRRs between open and short states to alter effective index.
  • Analyzing phase change and transmission characteristics.

Main Results:

  • Achieved 70-degree phase change in vertical design and 80 degrees in planar design.
  • Maintained high transmission levels during phase modulation.
  • Demonstrated thin metamaterial layers (5 mm and 2.28 mm).

Conclusions:

  • Stacked DSRR structures are effective for achieving significant phase modulation.
  • The proposed designs offer efficient phase control with compact layer thicknesses.
  • Numerical results align with theoretical predictions, validating the approach.