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

1.7K
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:
1.7K
Sound as Pressure Waves01:17

Sound as Pressure Waves

4.9K
Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
4.9K
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

1.1K
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
1.1K

You might also read

Related Articles

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

Sort by
Same author

Experimental focusing shocklike dynamics in a nonlocal optical stochastic Kerr medium.

Physical review. E·2021
Same author

Optical wall dynamics induced by coexistence of monostable and bistable spatial regions.

Physical review. E·2016
Same author

Experimental evidence of dynamical propagation for solitary waves in ultra slow stochastic non-local Kerr medium.

Optics express·2016
Same author

Experimental evidence of dynamical propagation for solitary waves in ultra slow stochastic non-local Kerr medium.

Optics express·2016
Same author

Control and generation of drifting patterns by asymmetrical Fourier filtering.

Physical review. E·2016
Same author

Recurrent noise-induced phase singularities in drifting patterns.

Physical review. E, Statistical, nonlinear, and soft matter physics·2015

Related Experiment Video

Updated: Apr 20, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

11.8K

Pattern-dislocation-type dynamical instability in 1D optical feedback Kerr media with Gaussian transverse pumping.

E Louvergneaux1

  • 1Laboratoire de Physique des Lasers, Atomes et Molécules, UMR 8523, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq Cedex, France.

Physical Review Letters
|December 12, 2001
PubMed
Summary

Secondary instability in liquid crystals arises from control parameter variations, leading to roll dislocations. This phenomenon mirrors the Eckhaus instability seen in fluid dynamics.

More Related Videos

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

10.2K
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
08:19

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

2.9K

Related Experiment Videos

Last Updated: Apr 20, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

11.8K
Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

10.2K
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
08:19

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

2.9K

Area of Science:

  • Physics
  • Materials Science
  • Nonlinear Dynamics

Background:

  • Stationary transverse roll patterns are observed in 1D liquid crystal layers with optical feedback.
  • Secondary instabilities can disrupt these stable patterns, leading to complex spatiotemporal dynamics.

Purpose of the Study:

  • To experimentally and numerically investigate the secondary instability in a 1D liquid crystal layer.
  • To identify the origin and mechanism of roll dislocations in spatiotemporal diagrams.
  • To establish the relationship between this optical instability and hydrodynamic phenomena.

Main Methods:

  • Experimental observation of pattern destabilization in a liquid crystal layer.
  • Numerical simulations to model the secondary instability.
  • Analysis of spatiotemporal diagrams to identify roll dislocations.

Main Results:

  • The secondary instability is experimentally and numerically confirmed.
  • Roll dislocations in spatiotemporal diagrams are identified as the manifestation of this instability.
  • The instability originates from the Gaussian spatial transverse dependence of the control parameter.
  • The mechanism involves the selection of a local unstable wave number.

Conclusions:

  • The study elucidates the origin and mechanism of a secondary instability in optically controlled liquid crystals.
  • This instability is identified as the optical analog of the ramp-induced Eckhaus instability in hydrodynamics.
  • Findings contribute to understanding pattern formation and destabilization in nonlinear systems.