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Related Concept Videos

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Dielectric Polarization in a Capacitor

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...
Electrostatic Boundary Conditions in Dielectrics01:27

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Gauss's Law in Dielectrics01:17

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Related Experiment Video

Updated: Jun 19, 2026

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
10:35

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Published on: September 26, 2014

Angular Goos-Hänchen effect in curved dielectric microstructures.

N H Tran, L Dutriaux, P Balcou

    Optics Letters
    |October 28, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study experimentally investigates the angular Goos-Hänchen effect on curved surfaces. Researchers identified an unexpected angular deflection extremum at low size parameters, not predicted by current theories.

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    Area of Science:

    • Optics
    • Condensed Matter Physics

    Background:

    • The Goos-Hänchen effect describes the lateral displacement of a light beam upon total internal reflection.
    • Understanding this effect at curved interfaces is crucial for advanced optical applications.

    Purpose of the Study:

    • To experimentally investigate the macroscopic angular Goos-Hänchen effect at total reflection on curved interfaces.
    • To compare experimental findings with the complex-angular-momentum (CAM) model.
    • To identify and characterize novel phenomena in angular deflection.

    Main Methods:

    • Experimental study of the angular Goos-Hänchen effect using total reflection on curved interfaces.
    • Comparison of results with the complex-angular-momentum model.
    • Analysis of angular deflection at low size parameters.

    Main Results:

    • Experimental observation of a macroscopic angular Goos-Hänchen effect on curved interfaces.
    • The complex-angular-momentum model was used for comparison.
    • An extremum in angular deflection was identified at low size parameters, a phenomenon not predicted by existing theories besides Mie scattering.

    Conclusions:

    • The study provides experimental evidence for the angular Goos-Hänchen effect on curved interfaces.
    • A novel extremum in angular deflection was discovered, highlighting limitations in current theoretical models.
    • Further theoretical and experimental work is needed to fully explain the observed phenomenon.