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

Angular Momentum: Single Particle01:10

Angular Momentum: Single Particle

6.7K
Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm...
6.7K
Angular Momentum01:21

Angular Momentum

447
Angular momentum characterizes an object's rotational motion and is defined as the moment of its linear momentum about a specified point O. When a particle moves along a curved path in the x-y plane, the scalar formulation calculates the magnitude of its angular momentum, utilizing the moment arm (d), representing the perpendicular distance from point O to the line of action of the linear momentum. Despite being scalar in formulation, angular momentum is inherently a vector quantity. Its...
447
Conservation of Angular Momentum: Application01:18

Conservation of Angular Momentum: Application

11.6K
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Examples of such systems include a freely spinning bicycle tire that slows over time due to torque arising from friction, or the slowing of Earth's rotation over millions of years due to frictional forces exerted on tidal deformations. However in the absence of a net external torque, the angular momentum remains conserved. The conservation of angular momentum principle requires a...
11.6K
Magnetic Moment of an Electron01:23

Magnetic Moment of an Electron

2.0K
Electrons revolving around a nucleus are analogous to a circular current carrying loop. This current produces a magnetic dipole moment proportional to the electron's orbital angular momentum. Since the orbital angular momentum is quantized in terms of the reduced Planck's constant, the dipole moment is quantized in the Bohr Magneton. The value of the Bohr magneton is 9.27 x 10-24 Am2. Electrons also have an intrinsic spin angular momentum, and the associated spin magnetic moment is...
2.0K
Conservation of Angular Momentum01:09

Conservation of Angular Momentum

10.9K
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Considering a system that consists of n tiny particles, the angular momentum of any tiny particle may change, but the system's total angular momentum would remain constant. The principle of conservation of angular momentum only considers the net external torque acting on the system. While there are internal forces exerted by different particles within the system that also produce...
10.9K
Angular Momentum about an Arbitrary Axis01:11

Angular Momentum about an Arbitrary Axis

296
Imagine a rigid body with a mass denoted as 'm', which has its center of mass at point G and is rotating around an inertial reference frame. The angular momentum at an arbitrary point P can be calculated by taking the cross product of the position vector and linear momentum vector for each individual mass element.
The velocity of a mass element comprises its translational velocity and the relative velocity instigated by the body's rotation. Substituting the velocity equation into...
296

You might also read

Related Articles

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

Sort by
Same author

Exploring the third dimension in quantum confinement of surface electrons.

Science advances·2026
Same author

Nonlinear nanophotonics for high-dimensional quantum states.

Light, science & applications·2026
Same author

Broadband near-infrared hyperbolic polaritons in MoOCl<sub>2</sub>.

Nature communications·2025
Same author

Near-field photon entanglement in total angular momentum.

Nature·2025
Same author

Photonic bandgap microcombs at 1064 nm.

APL photonics·2024
Same author

Revealing hidden spin polarization in centrosymmetric van der Waals materials on ultrafast timescales.

Nature communications·2024
Same journal

Taphonomic analysis at Liang Bua reveals the behavioral and technological capabilities of <i>Homo floresiensis</i>.

Science advances·2026
Same journal

Targeting granule initiation and amyloplast structure to create giant starch granules in wheat.

Science advances·2026
Same journal

A meta-analysis of carbon losses and gains from tropical moist forest degradation and regeneration.

Science advances·2026
Same journal

Ancient DNA reveals elite dynastic rule among Iron Age Eurasian Steppe nomads.

Science advances·2026
Same journal

Targeting astrocytic Dp71 attenuates BBB disruption after traumatic brain injury through WTAP-associated m<sup>6</sup>A regulation of MMP2.

Science advances·2026
Same journal

Pancreatic α cells are required for nutrient homeostasis by regulating dynamic β cell networks in islets.

Science advances·2026
See all related articles

Related Experiment Video

Updated: Oct 25, 2025

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.3K

Orbital angular momentum multiplication in plasmonic vortex cavities.

Grisha Spektor1,2,3, Eva Prinz4, Michael Hartelt4

  • 1Department of Electrical Engineering, Technion - Israel Institute of Technology, 32000 Haifa, Israel. grisha.spektor@gmail.com.

Science Advances
|August 12, 2021
PubMed
Summary
This summary is machine-generated.

Researchers harnessed structural boundary reflections to control light's orbital angular momentum in plasmonics. This breakthrough enables the generation of time-evolving vortex pulses with increasing topological charge for advanced photonic applications.

More Related Videos

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

13.0K
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

7.0K

Related Experiment Videos

Last Updated: Oct 25, 2025

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

7.3K
Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

13.0K
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

7.0K

Area of Science:

  • Photonics
  • Plasmonics
  • Light-matter interactions

Background:

  • Orbital angular momentum (OAM) of light is a fundamental property in photonics.
  • Confinement of OAM to surfaces via plasmonics has enabled numerous phenomena and applications.
  • Controlling plasmonic OAM is crucial for advancing photonic devices.

Purpose of the Study:

  • To introduce structural boundary reflections as a novel method for generating and controlling plasmonic OAM.
  • To experimentally demonstrate plasmonic vortex cavities capable of producing time-evolving vortex pulses.
  • To investigate the spatiotemporal dynamics and topological charge evolution of these plasmonic vortices.

Main Methods:

  • Utilizing structural boundaries to create plasmonic vortex cavities.
  • Generating a succession of vortex pulses with time-dependent topological charge.
  • Employing time-resolved photoemission electron microscopy (TR-PEEM) to track spatiotemporal dynamics.
  • Analyzing the growth of angular momentum in relation to cavity chiral order.

Main Results:

  • Successful demonstration of plasmonic vortex cavities generating time-evolving vortex pulses.
  • Observation of angularly decelerating plasmon pulse trains within cavities.
  • Experimental evidence of angular momentum growth by multiples of the cavity's chiral order.
  • Tracking dynamics over 300 femtoseconds.

Conclusions:

  • Structural boundary reflection offers a new degree of freedom for controlling plasmonic OAM.
  • This method allows for the generation of dynamically evolving vortex topologies.
  • Potential applications include miniaturized quantum initialization, enhanced plasmonic tweezers, and novel vortex lattice cavities.