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Related Concept Videos

Propagation of Waves01:07

Propagation of Waves

When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Travelling Waves01:04

Travelling Waves

A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is water;...
Wave Parameters01:10

Wave Parameters

The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
Interference and Diffraction02:18

Interference and Diffraction

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.
Standing Waves01:17

Standing Waves

Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
Velocity and Acceleration of a Wave00:51

Velocity and Acceleration of a Wave

A wave propagates through a medium with a constant speed, known as a wave velocity. It is different from the speed of the particles of the medium, which is not constant. In addition, the velocity of the medium is perpendicular to the velocity of the wave. The variable speed of the particles of the medium implies that there must be acceleration associated with it. 
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Updated: Jun 4, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Slow non-dispersing wavepackets.

Kyoung-Youm Kim1, Chi-Young Hwang, Byoungho Lee

  • 1Department of Optical Engineering, Sejong University, Seoul 143-747, Korea. kykim@sejong.ac.kr

Optics Express
|March 4, 2011
PubMed
Summary
This summary is machine-generated.

Researchers created non-dispersing wavepackets in plasmonic waveguides. These hybrid wavepackets combine slow-light modes and Airy wavepackets, preventing spatial and temporal spreading without nonlinear effects.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Plasmonic and metamaterial waveguides offer unique light-confining properties.
  • Controlling wavepacket dynamics, such as diffraction and dispersion, is crucial for optical applications.

Purpose of the Study:

  • To demonstrate the generation of slow, non-dispersing wavepackets in plasmonic or metamaterial slab waveguides.
  • To investigate the mechanisms behind the wavepacket's unique propagation characteristics.

Main Methods:

  • Formation of hybrid wavepackets by combining slow-light waveguide modes with diffraction-free Airy wavepackets.
  • Utilizing the inherent slow-light properties of waveguide modes.
  • Leveraging the initial velocity and temporal acceleration of the hybrid wavepackets.

Main Results:

  • Successfully generated wavepackets that exhibit neither spatial diffraction nor temporal spreading.
  • Achieved these non-dispersing properties without relying on nonlinear optical effects.
  • Identified three key mechanisms contributing to the wavepacket's slowness: waveguide mode properties, initial launch speed, and temporal acceleration.

Conclusions:

  • Hybrid wavepackets offer a novel approach to achieving non-dispersing light propagation in structured waveguides.
  • This method provides a pathway for robust optical signal transmission and manipulation in plasmonic and metamaterial systems.