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

1.6K
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:
1.6K
Speed of Sound in Solids and Liquids00:51

Speed of Sound in Solids and Liquids

4.1K
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...
4.1K
Conductors and Insulators01:19

Conductors and Insulators

11.4K
Some materials may easily let electrical charges pass through them, while others obstruct their flow. The former are called conductors and the latter insulators. The atomic structures of materials determine whether they are conductors or insulators of electricity.
Most metals are conductors. Their atomic configuration is such that one or more electron(s) are loosely bound to the nucleus in each atom. Thus, a sea of mobile electrons are available in them, known as free electrons. Their easy...
11.4K
Sound Waves01:01

Sound Waves

13.5K
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....
13.5K
Equipotential Surfaces and Conductors01:16

Equipotential Surfaces and Conductors

4.6K
For a conductor in which all charges are at rest, the conductor's surface is equipotential. The electric field is always perpendicular to equipotential surfaces. Therefore, in a conductor with static charges, the electric field just outside the conductor is always perpendicular to the conductor's surface. Any tangential component of the electric field will cause charges to move inside the conductor, which will violate the electrostatic nature of the system. In an electrostatic...
4.6K
Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

Imperfections in Crystal Structure: Stoichiometric Point Defects

58
Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
58

You might also read

Related Articles

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

Sort by
Same author

Observation of Floquet rotational super-radiance.

Nature·2026
Same author

Broadband Radiative Heat Transfer Suppression via Dispersion-Engineered Metasurfaces.

Nature communications·2026
Same author

Mie Scattering Analog Circuit Emulator.

Physical review letters·2026
Same author

Creation of a computational space with model-free metasurface neural network.

Nature communications·2026
Same author

Minkowski-Space Modeling of Hyperbolic Lenses.

Physical review letters·2026
Same author

Enhancing the antenna radiation-bandwidth product with dual-tone temporal modulation.

Nature communications·2026

Related Experiment Video

Updated: Mar 19, 2026

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

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

8.0K

Floquet topological insulators for sound.

Romain Fleury1,2,3, Alexander B Khanikaev4,5, Andrea Alù1

  • 1Department of Electrical and Computer Engineering, The University of Texas at Austin, 1616 Guadalupe Street UTA 7.215, Austin, Texas 78701, USA.

Nature Communications
|June 18, 2016
PubMed
Summary

Researchers developed acoustic Floquet topological insulators by modulating resonator properties in time. This overcomes limitations of moving media, enabling robust sound control for applications like broadband acoustic isolation and protected emitters.

More Related Videos

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
09:39

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

1.7K
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.6K

Related Experiment Videos

Last Updated: Mar 19, 2026

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

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

8.0K
Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
09:39

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

Published on: June 28, 2024

1.7K
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.6K

Area of Science:

  • Physics
  • Acoustics
  • Condensed Matter Physics

Background:

  • Topological order in condensed matter inspires classical wave phenomena research.
  • Acoustic topological insulators offer sound control with edge transport and defect immunity.
  • Existing methods using moving media face noise and absorption challenges.

Purpose of the Study:

  • To introduce and demonstrate acoustic Floquet topological insulators.
  • To overcome limitations of moving media in topological acoustics.
  • To explore applications in sound control and acoustic devices.

Main Methods:

  • Modulating acoustic properties in time within a lattice of resonators.
  • Applying the physics of Floquet topological insulators to acoustic waves.
  • Experimental demonstration of time-modulated acoustic systems.

Main Results:

  • Successful creation of acoustic Floquet topological insulators.
  • Demonstration of broadband acoustic isolation.
  • Exhibition of topologically protected, nonreciprocal acoustic emitters.

Conclusions:

  • Time modulation offers a viable path for practical topological acoustics.
  • Acoustic Floquet topological insulators enable robust sound manipulation.
  • This work opens avenues for advanced acoustic devices and applications.