Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

840
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:
840
Speed of Sound in Solids and Liquids00:51

Speed of Sound in Solids and Liquids

2.8K
Most solids and liquids are incompressible—their densities remain constant throughout. In the presence of an external force, the molecules tend to restore to their original positions, which is only possible because the constituents interact. The interactions help the constituents pass on information about external disturbances, like sound waves. Therefore, sound waves travel faster through these media. Compared to solids, the constituents in a liquid are less tightly bound. Thus, sound...
2.8K
Deriving the Speed of Sound in a Liquid01:09

Deriving the Speed of Sound in a Liquid

461
As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
461
Speed of Sound in Gases01:08

Speed of Sound in Gases

2.9K
The speed of sound in a gaseous medium depends on various factors. Since gases constitute molecules that are free to move, they are highly compressible. Hence, sound waves travel slowly through gases. Thermodynamics helps us understand the relationship between pressure, volume, and temperature of gases, thus, the speed of sound in an ideal gas can be determined using the laws of thermodynamics. At the same time, Newton's laws of motion and the continuity equation of fluid dynamics also come...
2.9K
Echo01:06

Echo

481
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
481
Sound Waves: Resonance01:14

Sound Waves: Resonance

2.5K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
2.5K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Advances in Capacitive Micromachined Ultrasonic Transducers.

Micromachines·2019
See all related articles

Related Experiment Video

Updated: May 20, 2025

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
09:39

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

797

Computing coherent phonon lifetimes in layered acoustic cavities.

Jesus Alejandro Avendano Bolivar1, Kevin Brenner1

  • 1Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080, USAjesusb@utdallas.edu, kevin.brenner@utdallas.edu.

JASA Express Letters
|March 26, 2025
PubMed
Summary

Researchers computed phonon lifetimes in layered crystal cavities using molecular dynamics simulations. This work advances ultrahigh-frequency resonators by understanding phonon decoherence in acoustic cavities.

More Related Videos

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.4K
Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
04:54

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

2.6K

Related Experiment Videos

Last Updated: May 20, 2025

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
09:39

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

797
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.4K
Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
04:54

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

2.6K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Acoustics

Background:

  • Confinement of coherent phonons in acoustic cavities enables ultrahigh-frequency resonators.
  • Phonon lifetime, the time before decoherence, is critical for resonator practicality.
  • Layered crystals offer potential for novel acoustic cavity designs.

Purpose of the Study:

  • To compute phonon lifetimes in acoustic cavities formed by layered crystals.
  • To investigate the influence of scattering mechanisms on phonon decoherence.
  • To provide a scalable computational framework for complex experimental cavities.

Main Methods:

  • Utilized molecular dynamics simulations to model phonon behavior.
  • Calculated phonon lifetimes within layered crystal structures.
  • Analyzed contributions from anharmonic and defect scattering mechanisms.

Main Results:

  • Determined phonon lifetimes in bilayer molybdenum disulfide cavities.
  • Quantified the impact of anharmonic and defect scattering on phonon decoherence.
  • Gained phonon-mode-level insight into scattering processes.

Conclusions:

  • The study provides a computational method for predicting phonon lifetimes in complex acoustic cavities.
  • Understanding phonon decoherence is key to developing advanced ultrahigh-frequency resonators.
  • The framework is adaptable for simulating realistic, chemically complex layered materials.