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

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for electronic transitions. As a result...
Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this process,...
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

You might also read

Related Articles

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

Sort by
Same author

Ultrafast Optical Probing of Hypersonic Phonons in Nanoscale GeTe Films.

The journal of physical chemistry letters·2026
Same author

Molecular Alignment Echo for Controlling the Readout Time of Vortex Beams.

Physical review letters·2026
Same author

Single InAs Nanowire Hypersonic Acoustic Nanoresonator.

The journal of physical chemistry letters·2025
Same author

Fatherhood experiences: A qualitative approach of cisgender and transgender fathers in assisted reproductive technologies (ART) situation with sperm donation.

Heliyon·2024
Same author

Alternative climatic steady states near the Permian-Triassic Boundary.

Scientific reports·2024
Same author

Persistent Ground-State Planar Alignment of Iodine Molecule through Resonant Excitation.

Physical review letters·2024

Related Experiment Video

Updated: Jun 24, 2026

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
06:16

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing

Published on: April 25, 2019

Ultraviolet-visible conical emission by multiple laser filaments.

Paolo Maioli1, Rami Salamé, N Lascoux

  • 1Université de Lyon, Université Lyon 1, CNRS, LASIM UMR 5579, bâtiment A. Kastler, 43 boulevard du 11 novembre 1918, F-69622 Villeurbanne, France. paolo.maioli@lasim.univ-lyon1.fr

Optics Express
|March 19, 2009
PubMed
Summary

Researchers studied supercontinuum emission from infrared lasers in air, finding X-waves or Cerenkov emission better explains the results than four-wave mixing. This research advances understanding of long-distance light propagation.

More Related Videos

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
09:49

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

Published on: October 23, 2018

Related Experiment Videos

Last Updated: Jun 24, 2026

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
06:16

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing

Published on: April 25, 2019

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
09:49

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

Published on: October 23, 2018

Area of Science:

  • Nonlinear Optics
  • Laser Physics
  • Atmospheric Optics

Background:

  • Supercontinuum generation is crucial for spectroscopy and optical imaging.
  • Understanding long-distance filament propagation is key for applications like remote sensing.
  • Conical emission in nonlinear processes has been debated, with phase matching and Cerenkov radiation as primary models.

Purpose of the Study:

  • To characterize the angular distribution of supercontinuum emission from multiple infrared laser filaments.
  • To investigate the underlying physical mechanisms responsible for conical emission in long-distance propagation.
  • To estimate the energy conversion efficiency into the white-light continuum.

Main Methods:

  • Experimental setup involving multiple infrared laser filaments propagating in air over extended distances.
  • Spectroscopic analysis of the generated supercontinuum from infrared to ultraviolet wavelengths.
  • Analysis of the angular distribution of the emitted light.

Main Results:

  • Detailed characterization of the angular distribution of supercontinuum emission was achieved.
  • Experimental data strongly suggest X-Waves modeling or Cerenkov emission as the dominant mechanism.
  • Four-wave mixing phase matching was found to be a less likely explanation for the observed conical emission.

Conclusions:

  • The findings provide critical insights into the physics of long-distance laser filamentation in air.
  • X-Waves or Cerenkov emission models are proposed as superior explanations for the observed conical emission patterns.
  • The study contributes to the understanding of efficient light conversion in nonlinear optical processes.