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Related Concept Videos

Oscillations In An LC Circuit01:31

Oscillations In An LC Circuit

An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
Forced Oscillations01:06

Forced Oscillations

When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.

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Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light
07:56

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Published on: September 20, 2017

Light-driven liquid-crystalline nonlinear oscillator under optical periodic forcing.

Dmitry O Krimer1, Etienne Brasselet

  • 1Theoretische Physik, Universitaet Tuebingen, 72076 Tuebingen, Germany.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 13, 2007
PubMed
Summary

This study introduces an all-optical method to control a liquid-crystal molecular oscillator without external feedback. The system exhibits diverse dynamics, including chaotic behavior, driven solely by light.

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Area of Science:

  • Nonlinear dynamics
  • Liquid-crystal physics
  • Molecular optics

Background:

  • Collective molecular nonlinear oscillators are crucial in various physical phenomena.
  • Controlling these oscillators typically requires external feedback mechanisms.
  • Light-driven systems offer novel control pathways.

Purpose of the Study:

  • To develop an all-optically driven strategy for governing a liquid-crystalline collective molecular nonlinear oscillator.
  • To investigate the dynamical regimes accessible through light-induced perturbations.
  • To validate the experimental observations with a theoretical framework.

Main Methods:

  • Utilizing incident light to sustain both the oscillator and a time-dependent perturbation.
  • Implementing an all-optical control strategy, eliminating the need for external feedback.
  • Employing a plane-wave approximation for theoretical analysis.

Main Results:

  • Demonstrated successful governance of the liquid-crystalline oscillator using only light.
  • Observed various dynamical regimes: frequency-locked, quasiperiodic, forced, and chaotic.
  • Confirmed experimental findings through theoretical modeling.

Conclusions:

  • An all-optical feedback-free strategy effectively controls liquid-crystalline molecular oscillators.
  • Light serves as a versatile tool for inducing and managing complex nonlinear dynamics.
  • The plane-wave theoretical model accurately predicts observed behaviors.