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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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.
Spin decoupling is usually achieved by...

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Related Experiment Video

Updated: Jun 11, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Large dynamic resonance transition between surface plasmon and localized surface plasmon modes.

Zhen Tian1, Abul K Azad, Xinchao Lu

  • 1School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.

Optics Express
|July 1, 2010
PubMed
Summary

We demonstrate a novel composite plasmonic film exhibiting dynamic terahertz transmission control. This material shows potential for advanced optical switching and active terahertz plasmonics applications.

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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Related Experiment Videos

Last Updated: Jun 11, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Area of Science:

  • Plasmonics
  • Terahertz (THz) technology
  • Materials science

Background:

  • Plasmonic films offer unique light-matter interactions.
  • Controlling terahertz transmission dynamically is crucial for advanced optics.

Purpose of the Study:

  • To investigate resonant terahertz transmission in a novel composite plasmonic film.
  • To explore the dynamic modulation capabilities of the film under optical excitation.

Main Methods:

  • Fabrication of a composite plasmonic film with metallic patches and semiconductor holes.
  • Optical excitation using near-infrared light.
  • Measurement of terahertz transmission spectra and phase shifts.

Main Results:

  • Observed a large dynamic transition between localized surface plasmon and surface plasmon resonance modes near 0.8 THz.
  • Demonstrated a reversal in transmission amplitude from stop-band to pass-band.
  • Achieved a phase shift up to pi/2.

Conclusions:

  • The composite plasmonic film exhibits significant dynamic phase modulation capabilities.
  • The material is promising for applications in optical changeover switching and active terahertz plasmonics.