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Related Concept Videos

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

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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 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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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...
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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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Metasurface polarization splitter.

Brian A Slovick1, You Zhou2, Zhi Gang Yu3

  • 1Applied Optics Laboratory, SRI International, Menlo Park, CA 94025, USA brian.slovick@sri.com.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|February 22, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a compact metasurface polarization splitter using silicon Mie resonators. This chip-scale device efficiently separates light polarizations, paving the way for integrated photonic circuits.

Keywords:
all-dielectricmetamaterialsmetasurfaces

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Area of Science:

  • Nanophotonics
  • Metasurfaces
  • Optical devices

Background:

  • Polarization beam splitters are essential optical components.
  • Traditional splitters are bulky, limiting integration with chip-scale photonic circuits.

Purpose of the Study:

  • To demonstrate a compact, chip-scale polarization splitter.
  • To leverage silicon Mie resonators for polarization splitting applications.

Main Methods:

  • Fabrication of a rectangular lattice of cylindrical silicon Mie resonators.
  • Characterization of the metasurface's optical properties and polarization splitting capabilities.

Main Results:

  • The metasurface functions as an efficient polarization splitter, reflecting one polarization and transmitting the other.
  • Polarization splitting is attributed to the anisotropic permittivity and permeability of the metasurface.
  • The device exhibits high polarization efficiency and low loss.

Conclusions:

  • Metasurface polarization splitters offer a low-profile, efficient solution for integrated photonics.
  • These devices are suitable for monolithic integration with optoelectronic and photonic circuits.