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Related Concept Videos

Interference: Path Lengths01:10

Interference: Path Lengths

2.4K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
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Interference and Diffraction02:18

Interference and Diffraction

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Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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Interference and Superposition of Waves01:07

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When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
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Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

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Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
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Sound Waves: Interference00:53

Sound Waves: Interference

5.0K
Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
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Related Experiment Video

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Multipolar interference effects in nanophotonics.

Wei Liu1, Yuri S Kivshar2,3

  • 1College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, People's Republic of China wei.liu.pku@gmail.com.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|February 22, 2017
PubMed
Summary
This summary is machine-generated.

Multipolar interference in nanostructures controls light scattering. This review explores electric, magnetic, and toroidal multipole interferences for advanced nanoscale light manipulation and applications.

Keywords:
Mie resonancesanapoleinterferencemultipole expansionnanostructures

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Area of Science:

  • Nanophotonics
  • Electromagnetic theory
  • Optical metamaterials

Background:

  • Scattering of electromagnetic waves by nanoscale objects is described by multipole decomposition.
  • Interference of multipole modes is crucial for nanoscale light manipulation in nanophotonics.

Purpose of the Study:

  • To review multipolar interference effects in various nanostructures.
  • To provide a comprehensive view of phenomena driven by electric, magnetic, and toroidal multipole interferences.
  • To explore potential future applications of multipolar interference in nanophotonics.

Main Methods:

  • Review of existing literature on multipolar interference in nanophotonics.
  • Analysis of phenomena driven by multipolar interference, including unidirectional scattering, optical antiferromagnetism, and anapoles.
  • Discussion of potential exploitation of unexploited multipolar interference effects.

Main Results:

  • Multipolar interference enables control over scattering intensity and radiation patterns.
  • Key phenomena like unidirectional scattering, optical antiferromagnetism, and anapoles are driven by multipolar interference.
  • Existing nanostructures (metallic, metal-dielectric, dielectric) exhibit these effects.

Conclusions:

  • Multipolar interference is a fundamental concept for understanding and controlling light-matter interactions at the nanoscale.
  • Further exploitation of multipolar interference, through phase and amplitude engineering, promises advanced nanoscale light control.
  • This review provides a foundation for future research in nanophotonics leveraging multipolar interference.