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

Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

6.3K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
6.3K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

2.5K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
2.5K
Phase Transitions02:31

Phase Transitions

24.0K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
24.0K

You might also read

Related Articles

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

Sort by
Same author

Trends in Gestational Diabetes Identified through Universal Screening: A Population-Based Observational Study.

BJOG : an international journal of obstetrics and gynaecology·2026
Same author

Detective quantum efficiency of the Timepix4 hybrid pixel detector and its application to parallel-beam diffraction.

Ultramicroscopy·2026
Same author

Detective Quantum Efficiency-Based Comparison of HRTEM and Ptychography Phase Imaging.

Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·2026
Same author

Induced Circular Dichroism From the Binding of Achiral Bivalent Ligands to Transthyretin.

Journal of molecular recognition : JMR·2026
Same author

Metasurface analogues of molecular diastereomers from hierarchical multiscale chiral interactions with biomolecules.

Nature communications·2026
Same author

Drift correction methods for multi-pass 4D-STEM.

Ultramicroscopy·2026

Related Experiment Video

Updated: Apr 16, 2026

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

7.0K

Photo-induced optical activity in phase-change memory materials.

Konstantin B Borisenko1, Janaki Shanmugam1, Benjamin A O Williams2

  • 11] Department of Materials, University of Oxford, Parks Road, Oxford. OX1 3PH, United Kingdom [2] Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0FA, UK.

Scientific Reports
|March 6, 2015
PubMed
Summary

Researchers induced optical activity in phase-change materials using circularly polarized laser light. This rapid photo-crystallization enables new optical memory and chiral metamaterial applications.

More Related Videos

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
09:49

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

Published on: May 13, 2020

4.5K
Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

9.3K

Related Experiment Videos

Last Updated: Apr 16, 2026

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

7.0K
In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
09:49

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

Published on: May 13, 2020

4.5K
Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

9.3K

Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Amorphous phase-change materials like Ge2Sb2Te5 are crucial for memory devices.
  • Controlling optical properties at the nanoscale is key for advanced applications.
  • Inducing chirality in isotropic materials presents a significant challenge.

Purpose of the Study:

  • To demonstrate the induction of optical activity in amorphous Ge2Sb2Te5 and N-doped Ge2Sb2Te5N thin films.
  • To explore the potential of circularly polarized laser light for material modification.
  • To investigate the feasibility of rapid, controlled induction of anisotropy.

Main Methods:

  • Rapid photo-crystallization of amorphous Ge2Sb2Te5 and N-doped Ge2Sb2Te5N thin films.
  • Irradiation using circularly polarized laser light.
  • Confirmation of induced anisotropy via circular dichroism measurements.

Main Results:

  • Successfully induced optical activity in amorphous isotropic thin films.
  • Demonstrated a new anisotropic phase transition.
  • Confirmed the results using circular dichroism spectroscopy.

Conclusions:

  • Optical activity can be controllably induced in phase-change materials using circularly polarized light.
  • This technique allows for nanosecond-scale control over optical properties.
  • Potential applications include high-density optical memory, chiroptical switches, and chiral metamaterials.