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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,...
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.
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...
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

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Related Experiment Video

Updated: Jul 7, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

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Published on: September 5, 2019

Halfwave retarder for all polarization states.

R Bhandari

    Applied Optics
    |May 1, 1997
    PubMed
    Summary

    A novel optical device with a rotator and two quarter-wave plates functions as a half-wave retarder. This device precisely manipulates specific orthogonal elliptical polarization states through optical rotation and plate orientation adjustments.

    Area of Science:

    • Optics and Photonics
    • Polarization Optics

    Background:

    • Quarter-wave plates are essential optical components for manipulating light polarization.
    • Optical rotators introduce phase shifts and alter polarization states.

    Purpose of the Study:

    • To investigate the polarization transformation properties of a device combining an optical rotator and quarter-wave plates.
    • To identify conditions under which this device acts as a half-wave retarder.

    Main Methods:

    • Theoretical analysis of light propagation through cascaded optical elements.
    • Mathematical formulation of polarization transformations using Jones matrices.
    • Systematic variation of optical rotation and quarter-wave plate orientations.

    Main Results:

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    • The device consistently functions as a half-wave retarder for specific orthogonal elliptical polarization states.
    • These states are deterministically selected by adjusting the optical rotation angle and quarter-wave plate orientation.
    • The configuration demonstrates tunable polarization control.

    Conclusions:

    • A simple optical setup can precisely control and transform elliptical polarization states.
    • This device offers a versatile method for generating and manipulating half-wave retardation effects.
    • Potential applications in optical communications and polarization-based sensing.