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

Capacitor With A Dielectric01:18

Capacitor With A Dielectric

4.9K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
4.9K
Gauss's Law in Dielectrics01:17

Gauss's Law in Dielectrics

5.1K
Consider a polar dielectric placed in an external field. In such a dielectric, opposite charges on adjacent dipoles neutralize each other, such that the net charge within the dielectric is zero. When a polar dielectric is inserted in between the capacitor plates, an electric field is generated due to the presence of net charges near the edge of the dielectric and the metal plates interface. Since the external electrical field merely aligns the dipoles, the dielectric as a whole is neutral. An...
5.1K
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

5.9K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
5.9K
Susceptibility, Permittivity and Dielectric Constant01:26

Susceptibility, Permittivity and Dielectric Constant

2.8K
When placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.
2.8K
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

1.9K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
1.9K
Production Efficiency01:01

Production Efficiency

18.2K
Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
18.2K

You might also read

Related Articles

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

Sort by
Same author

Modified MXene Aerogel With Broadband Microwave Absorption Inspired by Melanophila Acuminata Beetle.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Synthesis and morphological control mechanism of boron nitride fibers in closed systems.

RSC advances·2026
Same author

Varifocal Alvarez metalens array for adaptive light-field imaging.

Nature communications·2026
Same author

Analysis of imported Chikungunya cases in China from 2006 to 2026.

Frontiers in microbiology·2026
Same author

A Modular PLUG-IN Photosynthetic Chassis With Tunable Thermal Control for Mammalian Systems.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

A Metabolic-Related Gene Signature for Predicting Biochemical Recurrence After Radical Prostatectomy: An Integrative Analysis and Targeted Therapeutic Validation.

International journal of molecular sciences·2026

Related Experiment Video

Updated: Jan 24, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

6.7K

Optical edge detection based on high-efficiency dielectric metasurface.

Junxiao Zhou1,2, Haoliang Qian2, Ching-Fu Chen2

  • 1Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, 410082 Changsha, China.

Proceedings of the National Academy of Sciences of the United States of America
|May 19, 2019
PubMed
Summary

Researchers developed a novel optical edge detection method using Pancharatnam-Berry-phase metasurfaces. This technique enables broadband edge detection with high efficiency, paving the way for miniaturized optical devices.

Keywords:
Pancharatnam–Berry phaseedge detectionmetasurfacespatial differentiation

More Related Videos

Optical Trap Loading of Dielectric Microparticles In Air
08:57

Optical Trap Loading of Dielectric Microparticles In Air

Published on: February 5, 2017

9.5K
Fabrication Process of Silicone-based Dielectric Elastomer Actuators
10:32

Fabrication Process of Silicone-based Dielectric Elastomer Actuators

Published on: February 1, 2016

34.6K

Related Experiment Videos

Last Updated: Jan 24, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
09:33

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

6.7K
Optical Trap Loading of Dielectric Microparticles In Air
08:57

Optical Trap Loading of Dielectric Microparticles In Air

Published on: February 5, 2017

9.5K
Fabrication Process of Silicone-based Dielectric Elastomer Actuators
10:32

Fabrication Process of Silicone-based Dielectric Elastomer Actuators

Published on: February 1, 2016

34.6K

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Image Processing

Background:

  • Optical edge detection is crucial for object detection and boundary characterization in image processing.
  • Metamaterials and metasurfaces offer miniaturization potential for optical devices, but experimental realization of edge detection remains challenging.
  • Existing methods often lag behind theoretical advancements in metamaterial-based optical applications.

Purpose of the Study:

  • To propose and experimentally demonstrate a novel mechanism for optical edge detection.
  • To utilize Pancharatnam-Berry-phase metasurfaces for broadband edge detection with high optical efficiency.
  • To facilitate the integration of advanced edge detection capabilities into compact optical platforms.

Main Methods:

  • Design and fabrication of dielectric metasurfaces using focused laser beam scanning within a glass substrate.
  • Experimental demonstration of broadband edge detection capabilities.
  • Characterization of optical efficiency and performance of the designed metasurfaces.

Main Results:

  • Successful experimental realization of broadband optical edge detection using Pancharatnam-Berry-phase metasurfaces.
  • Achieved high optical efficiency in the demonstrated edge detection mechanism.
  • Metasurfaces fabricated via laser scanning are easily integrated with conventional optical components.

Conclusions:

  • The proposed Pancharatnam-Berry-phase metasurface offers a viable and efficient solution for optical edge detection.
  • This technology has significant potential for applications in image processing, microscopy, and real-time object detection.
  • The developed metasurfaces enable the creation of compact optical platforms for advanced functionalities.