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Related Concept Videos

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;...
Reflection of Waves01:07

Reflection of Waves

When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...
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...
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...
Sound Waves01:01

Sound Waves

Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well. Hence,...
Plane Electromagnetic Waves II01:29

Plane Electromagnetic Waves II

Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.

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Related Experiment Video

Updated: May 19, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
06:51

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

The 2026 guided acoustic waves roadmap.

Hubert J Krenner1, Paulo V Santos2, Christoph Westerhausen3

  • 1Physikalisches Institut, Universität Münster, Wilhelm-Klemm-Straße 10, Münster 48149, Germany.

Journal of Physics D: Applied Physics
|March 4, 2026
PubMed
Summary
This summary is machine-generated.

Guided elastic waves, including surface acoustic wave (SAW) and bulk acoustic wave devices, are crucial technologies. This review updates the 2019 roadmap, examining the field's current status and future challenges.

Keywords:
guided acoustic wavesphononicssurface acoustic waves

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Area of Science:

  • Physics
  • Materials Science
  • Engineering

Background:

  • Surface acoustic wave (SAW) and bulk acoustic wave devices have been key technologies for over 50 years.
  • Guided elastic waves are a cross-disciplinary technology with applications ranging from quantum technologies to life sciences.

Purpose of the Study:

  • To provide an updated overview of the field of guided elastic waves.
  • To identify current challenges and future prospects in guided elastic wave research.

Main Methods:

  • Review of recent advancements in guided elastic wave research.
  • Analysis of the expanded applications spectrum since the 2019 roadmap.

Main Results:

  • The field of guided elastic waves has significantly expanded in scope and application.
  • New developments span from quantum technologies to condensed matter physics.

Conclusions:

  • Guided elastic waves remain a vital and evolving technology.
  • Further research is needed to address emerging challenges and opportunities.