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Related Concept Videos

Interference and Diffraction02:18

Interference and Diffraction

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Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
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Potential Due to a Polarized Object01:29

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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,...
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Group Polarization01:01

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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.
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Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Induced transparency by interference or polarization.

Changqing Wang1, Xuefeng Jiang1, William R Sweeney2,3,4

  • 1Department of Electrical and Systems Engineering, Washington University, St. Louis, MO 63130.

Proceedings of the National Academy of Sciences of the United States of America
|January 5, 2021
PubMed
Summary
This summary is machine-generated.

Polarization-induced transparency (PIT) in optical systems, distinct from electromagnetically induced transparency (EIT), arises from polarization rotation. This finding offers new ways to control light flow in resonator systems.

Keywords:
electromagnetically induced transparencyinterferencepolarization

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Area of Science:

  • Optics and Photonics
  • Quantum Optics
  • Resonator Systems

Background:

  • Polarization is key in all-optical analogues of electromagnetically induced transparency (EIT).
  • Distinguishing EIT origins from polarization-induced phenomena is challenging for applications like slow light and optical storage.
  • Existing systems lack clear differentiation between EIT and polarization effects.

Purpose of the Study:

  • To investigate and differentiate the physical origins of polarization-induced transparency (PIT) from EIT.
  • To analyze polarization effects in various optical EIT systems.
  • To explore the potential of PIT and EIT coexistence for light manipulation.

Main Methods:

  • Studying polarization effects in coupled optical resonator systems.
  • Analyzing transmission spectra to identify transparency windows.
  • Investigating the role of polarization mismatch and rotation in inducing transparency.

Main Results:

  • A polarization mismatch between whispering gallery modes can create a transparency window resembling EIT.
  • This polarization-induced transparency (PIT) is distinct from EIT, stemming from polarization rotation.
  • PIT exhibits a unidirectional feature, unlike traditional EIT.

Conclusions:

  • Polarization-induced transparency (PIT) is a phenomenon separate from EIT, driven by polarization rotation.
  • The coexistence of PIT and EIT provides novel mechanisms for controlling light in optical resonators.
  • This research clarifies fundamental distinctions and offers new avenues for optical device applications.