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Related Concept Videos

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
Dielectric Polarization in a Capacitor01:31

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...
Group Polarization01:01

Group Polarization

Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
Silica Gel Column Chromatography: Overview01:10

Silica Gel Column Chromatography: Overview

Silica gel column chromatography is a technique for separating compounds using a column packed with silica gel as the stationary phase. This method relies on differences in the polarity of compounds. Based on their polarities, compounds move between the stationary phase (silica gel) and the mobile phase (the solvent), forming discrete bands in the column.
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...

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Related Experiment Video

Updated: Jun 22, 2026

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
08:32

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

Published on: January 29, 2013

Polarization conversion in a silica microsphere.

Pablo Bianucci, Chris R Fietz, John W Robertson

    Optics Express
    |June 24, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Researchers achieved efficient polarization conversion in a whispering gallery mode resonator. This optical fiber device shows potential for advanced light manipulation applications.

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    Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
    08:06

    Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

    Published on: June 2, 2017

    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Whispering gallery mode resonators offer unique light confinement properties.
    • Controlling light polarization is crucial for optical communication and sensing.

    Purpose of the Study:

    • To demonstrate and analyze controlled polarization-selective phenomena in a whispering gallery mode resonator.
    • To achieve efficient polarization conversion of light within an optical microsphere system.

    Main Methods:

    • Experimental setup involving a silica microsphere coupled to a tapered optical fiber.
    • Precise optimization of the polarization of the propagating light.
    • Observation and measurement of polarization conversion efficiency.

    Main Results:

    • Achieved approximately 75% polarization conversion efficiency.
    • Demonstrated controlled polarization-selective phenomena.
    • Validated experimental results with a simple ring resonator model.

    Conclusions:

    • Controlled polarization conversion is feasible in whispering gallery mode resonators.
    • Silica microspheres coupled to tapered fibers are effective for polarization manipulation.
    • The findings support the use of these resonators in advanced optical applications.