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Related Concept Videos

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...
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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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Related Experiment Video

Updated: Jul 4, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

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Published on: November 11, 2013

Light polarization-based electro-optic memory.

Quanzhen Wan1,2, Shi Zhao1,2, Baoshan Tang1,2

  • 1Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, Singapore.

Nature Communications
|July 2, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel 2D rhenium disulfide/hafnium zirconium oxide transistor for polarization-sensitive memory. This breakthrough enables advanced optical computing and data storage by utilizing light polarization for information processing.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Non-volatile memory is crucial for modern electronics.
  • Integrating light polarization for information processing offers new possibilities.
  • Practical polarization-sensitive memory devices are currently rare.

Purpose of the Study:

  • To develop a practical polarization-sensitive memory device.
  • To explore the use of 2D materials and ferroelectrics for optical information processing.
  • To enhance information density in photonic computing.

Main Methods:

  • Fabrication of a 2D rhenium disulfide (ReS2)/hafnium zirconium oxide (HZO) ferroelectric field-effect transistor.
  • Utilizing field-driven charge separation for polarization-resolved memory.
  • Investigating the effects of interfacial stress on material properties.

Main Results:

  • Demonstrated a polarization-sensitive memory device based on ReS2/HZO heterostructure.
  • Achieved >93% accuracy in photonic neural networks using the device.
  • Showcased in-situ multiplication and accumulation capabilities, saving area with minimal accuracy loss.
  • Exploited optical polarization as an additional information readout channel.

Conclusions:

  • The developed device enables polarization-resolved non-volatile memory.
  • This technology significantly increases information density for photonic computing.
  • The device shows promise for advanced communication, computation, and imaging applications.