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

Negative Regulator Molecules01:23

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current01:14

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current

An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
Atomic Nuclei: Nuclear Spin01:08

Atomic Nuclei: Nuclear Spin

All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute to...
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
Diamagnetism01:26

Diamagnetism

Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.

You might also read

Related Articles

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

Sort by
Same author

Waves in hyperbolic and double negative metamaterials including rogues and solitons.

Nanotechnology·2017
Same author

Rapid assessment of nonlinear optical propagation effects in dielectrics.

Scientific reports·2015
Same author

Harnessing optical vortex lattices in nematic liquid crystals.

Physical review letters·2013
Same author

First-order optical Freedericksz transition in a dye-doped nematic liquid crystal.

Optics letters·2013
Same author

All-optical switching of a signal by a pair of interacting nematicons.

Optics express·2012
Same author

Vortex induction via anisotropy stabilized light-matter interaction.

Physical review letters·2012
Same journal

Gaussian-modulated continuous-variable quantum key distribution over 60 km fiber using an integrated silicon photonic receiver.

Optics letters·2026
Same journal

E2E-OCT: end-to-end joint learning model using optical coherence tomography images for vocal cord leukoplakia diagnosis.

Optics letters·2026
Same journal

Holographic generation of panoramic 3D scenes by concave ellipsoidal mirror reflection.

Optics letters·2026
Same journal

Dual-pilot phase recovery with pair-wise maximum-ratio combining for coherent PONs.

Optics letters·2026
Same journal

Mapping the whispering gallery modes of a CaF<sub>2</sub> disk resonator with half-tapered fibers to estimate the fundamental mode volume.

Optics letters·2026
Same journal

Quantitative estimation of deep-subwavelength scale via dark-field scattering axial energy concentration decay profiles.

Optics letters·2026
See all related articles

Related Experiment Video

Updated: Jun 2, 2026

Forming, Confining, and Observing Microtubule-Based Active Nematics
08:37

Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

Dark nematicons.

A Piccardi1, A Alberucci, N Tabiryan

  • 1Nonlinear Optics and OptoELectronics Laboratory (NooEL) Via della Vasca Navale 84, 00146 Rome, Italy.

Optics Letters
|April 19, 2011
PubMed
Summary
This summary is machine-generated.

We demonstrate and model dark spatial solitons in azo-doped liquid crystals, considering nonlinear optical effects. The study probes soliton guiding properties using a different wavelength input.

More Related Videos

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis
07:31

Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis

Published on: July 16, 2020

Related Experiment Videos

Last Updated: Jun 2, 2026

Forming, Confining, and Observing Microtubule-Based Active Nematics
08:37

Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis
07:31

Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis

Published on: July 16, 2020

Area of Science:

  • Nonlinear optics
  • Liquid crystal physics
  • Materials science

Background:

  • Spatial solitons are self-trapping light beams.
  • Azo-doped liquid crystals exhibit unique nonlinear optical properties.
  • Understanding nonlinear phenomena in these materials is crucial for optical applications.

Purpose of the Study:

  • To experimentally demonstrate and theoretically model dark spatial solitons.
  • To investigate the influence of saturation and nonlocality on soliton behavior.
  • To explore the guiding properties of these solitons using wavelength-dependent probing.

Main Methods:

  • Experimental setup for generating and observing dark spatial solitons.
  • Numerical modeling incorporating saturation and nonlocality effects.
  • Probing soliton characteristics with a weak optical beam at a different wavelength.

Main Results:

  • Successful demonstration of dark spatial solitons in azo-doped liquid crystals.
  • The developed model accurately captures the observed soliton dynamics, including saturation and nonlocality.
  • Experimental evidence of the soliton's ability to guide light at a different wavelength.

Conclusions:

  • Dark spatial solitons are achievable in azo-doped liquid crystals.
  • Nonlinear effects like saturation and nonlocality are critical for accurate modeling.
  • These solitons show potential for all-optical switching and guiding applications.