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

Susceptibility, Permittivity and Dielectric Constant01:26

Susceptibility, Permittivity and Dielectric Constant

3.1K
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.
3.1K
Average Acceleration01:30

Average Acceleration

14.6K
The importance of understanding acceleration spans our day-to-day experiences, as well as the vast reaches of outer space and the tiny world of subatomic physics. In everyday conversation, to accelerate means to speed up. For instance, we are familiar with the acceleration of our car; the harder we apply our foot to the gas pedal, the faster we accelerate. The greater the acceleration, the greater the change in velocity over a given time. Acceleration is widely seen in experimental physics. In...
14.6K
What is a Mode?01:07

What is a Mode?

26.7K
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
26.7K
Average Velocity01:12

Average Velocity

24.4K
To calculate the other physical quantities in kinematics, we must introduce the time variable. The time variable allows us not only to state the position of the object during its motion, but also how fast it is moving. The speed at which an object is moving is given by the rate at which the position changes with time. For each position xi, we assign a particular time ti. If the details of the motion at each instant are not important, the rate is usually expressed as the average velocity. This...
24.4K
Average Value of a Function01:17

Average Value of a Function

70
The average value of a function over a closed interval can be interpreted geometrically as the height of a rectangle whose area equals the net area under the curve across that interval. This net area accounts for both positive and negative contributions of the function, providing a single representative value that reflects the function’s overall behaviorA practical illustration of this idea arises when monitoring the temperature inside a greenhouse over a twenty-four-hour period. Although...
70
Average Power01:13

Average Power

1.1K
In practical electrical applications, the concept of time-varying instantaneous power is not frequently utilized. Instead, focus shifts to the more practical quantity known as average power. Average power is determined by integrating the instantaneous power over a specified time period and subsequently dividing it by that duration.
1.1K

You might also read

Related Articles

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

Sort by
Same author

Alterations in the fecal virome and bacteriome-virome interplay in IPAH.

Respiratory research·2026
Same author

Multi-ring necklace vortex solitons in Kerr nonlinear media with azimuthally modulated Bessel potentials.

Journal of the Optical Society of America. A, Optics, image science, and vision·2026
Same author

Design methodology of broadband near-perfect thin-film absorbers based on ideal dispersion relations.

Optics letters·2026
Same author

Parametrically driven pure-quartic solitons.

Optics letters·2026
Same author

Vortex solitons in disclination quasicrystals.

Reports on progress in physics. Physical Society (Great Britain)·2026
Same author

A 3D-Printed Scaffolded Hydrogel Microneedle Array Biosensor for Real-Time, Continuous Monitoring.

Advanced materials (Deerfield Beach, Fla.)·2026

Related Experiment Video

Updated: Feb 14, 2026

Writing Bragg Gratings in Multicore Fibers
08:48

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

8.7K

Surface modes in plasmonic Bragg fibers with negative average permittivity.

Hanying Deng, Yihang Chen, Nicolae C Panoiu

    Optics Express
    |February 7, 2018
    PubMed
    Summary

    Surface modes in plasmonic Bragg fibers depend on the average permittivity sign. Localized modes appear at the core-dielectric interface, similar to topological surface modes in planar structures.

    More Related Videos

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
    08:23

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

    Published on: September 30, 2019

    6.7K
    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

    7.3K

    Related Experiment Videos

    Last Updated: Feb 14, 2026

    Writing Bragg Gratings in Multicore Fibers
    08:48

    Writing Bragg Gratings in Multicore Fibers

    Published on: April 20, 2016

    8.7K
    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
    08:23

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

    Published on: September 30, 2019

    6.7K
    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

    7.3K

    Area of Science:

    • Condensed matter physics
    • Nanophotonics
    • Materials science

    Background:

    • Plasmonic Bragg fibers utilize nanostructured metal-dielectric multilayers.
    • Surface modes are crucial for light confinement and manipulation in nanophotonic devices.

    Purpose of the Study:

    • Investigate surface modes in plasmonic Bragg fibers.
    • Determine the conditions for the existence and properties of these modes.
    • Explore their topological characteristics and robustness.

    Main Methods:

    • Theoretical analysis of surface modes in coaxial cylindrical metal-dielectric multilayers.
    • Numerical simulations to study mode behavior with varying structural parameters.
    • Comparison with surface plasmon polaritons in planar systems.

    Main Results:

    • The existence of surface modes is dictated by the sign of the spatially averaged permittivity (ε¯) of the plasmonic Bragg fiber.
    • Localized surface modes emerge at the interface between a core with ε¯<0 and a dielectric medium.
    • Mode propagation constants approach those of planar surface plasmon polaritons as the number of rings increases.
    • Demonstrated robustness of these surface modes.

    Conclusions:

    • Plasmonic Bragg fibers support topologically protected surface modes analogous to planar systems.
    • The averaged permittivity sign is a key factor governing surface mode formation.
    • These findings offer insights into designing advanced nanophotonic devices with tailored optical properties.