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

1.3K
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:
1.3K
The de Broglie Wavelength02:32

The de Broglie Wavelength

32.5K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
32.5K
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

2.5K
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...
2.5K
Intensity Of Electromagnetic Waves01:22

Intensity Of Electromagnetic Waves

5.5K
The energy transport per unit area per unit time, or the Poynting vector, gives the energy flux of an electromagnetic wave at any specific time. For a plane electromagnetic wave with E0 and B0 as the peak electric and magnetic fields and traveling along the x-axis, the time-varying energy flux can be given by the following equation:
5.5K

You might also read

Related Articles

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

Sort by
Same author

Probing Moiré Excitons in MoSe<sub>2</sub>/WSe<sub>2</sub> Heterobilayers by Combined Micro-photoluminescence and Lateral Force Microscopy.

Nano letters·2026
Same author

Subterahertz Spin Relaxation Dynamics of Boron-Vacancy Centers in Hexagonal Boron Nitride.

Nano letters·2026
Same author

Imaging the flat bands of magic-angle graphene reshaped by interactions.

Nature·2026
Same author

Revealing Electron-Electron Interactions in Graphene at Room Temperature with a Quantum Twisting Microscope.

Nano letters·2026
Same author

Probing boron vacancy defects in hBN via single spin relaxometry.

Nature communications·2026
Same author

Programmable Phase Selection between Altermagnetic and Noncentrosymmetric Polymorphs of MnTe on InP via Molecular Beam Epitaxy.

ACS applied materials & interfaces·2026

Related Experiment Video

Updated: Dec 14, 2025

Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization
07:50

Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization

Published on: July 17, 2015

11.5K

Up- and Down-Conversion between Intra- and Intervalley Excitons in Waveguide Coupled Monolayer WSe2.

Yueh-Chun Wu1, Sarath Samudrala2, Andrew McClung2

  • 1Department of Physics, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States.

ACS Nano
|July 21, 2020
PubMed
Summary

Researchers developed a waveguide device to study dark excitons in tungsten diselenide (WSe2) monolayers. This method efficiently populates spin-dark excitons, revealing complex couplings and common spin-flip processes in 2D semiconductors.

Keywords:
spin-fliptungsten diselenideup-conversionvalley excitonwaveguide coupling

More Related Videos

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

7.1K
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

19.3K

Related Experiment Videos

Last Updated: Dec 14, 2025

Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization
07:50

Electron Channeling Contrast Imaging for Rapid III-V Heteroepitaxial Characterization

Published on: July 17, 2015

11.5K
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

7.1K
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

19.3K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Monolayer transition metal dichalcogenides (TMDs) possess two spin-split valleys, enabling diverse exciton species.
  • Bright excitons (spin-0 intravalley) are easily observed, but spin-dark (spin-1 intravalley) and momentum-dark (spin-0 intervalley) excitons are challenging to access.

Purpose of the Study:

  • To develop a method for probing and populating less accessible exciton species in monolayer TMDs.
  • To investigate the coupling network and scattering processes between different exciton types.

Main Methods:

  • Fabrication of a waveguide-coupled monolayer tungsten diselenide (WSe2) device.
  • Utilizing TM coupling to atomic layer out-of-plane dipole moments for exciton manipulation.
  • Resonant population and efficient collection of spin-dark excitons.

Main Results:

  • Efficient collection and resonant population of spin-1 dark excitons in WSe2.
  • Observation of multiple upconversion processes, indicating an intricate coupling network.
  • Demonstration that intervalley scattering and spin-flip are common in monolayer TMDs.

Conclusions:

  • Planar photonic devices can harness versatile exciton species in TMD semiconductors.
  • The developed waveguide approach is promising for creating devices with long valley lifetimes.
  • This study deepens the understanding of exciton physics in WSe2 and related 2D materials.