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Related Concept Videos

Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
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Types of Semiconductors01:20

Types of Semiconductors

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Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
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Fermi Level Dynamics01:12

Fermi Level Dynamics

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The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
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Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Semiconductor Quantum Plasmonics.

Angela Vasanelli1, Simon Huppert2, Andrew Haky1

  • 1Laboratoire de Physique de l'Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, 75005 Paris, France.

Physical Review Letters
|November 16, 2020
PubMed
Summary
This summary is machine-generated.

We explore quantum plasmonics in semiconductors, revealing how electron confinement impacts plasmonic resonances. This research bridges classical and quantum realms for advanced semiconductor plasmonics applications.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Optics
  • Materials Science

Background:

  • Classical plasmonics typically uses metals, limiting quantum effects.
  • Semiconductors offer a tunable platform to study quantum electron behavior in plasmonics.
  • Understanding quantum effects is crucial for advancing plasmonic technologies.

Purpose of the Study:

  • Investigate the boundary between classical and quantum plasmonics.
  • Develop a quantum model for plasmonic resonances in semiconductors.
  • Explore the influence of quantum confinement on plasmonic modes.

Main Methods:

  • Utilized a quantum model to calculate collective plasmonic resonances.
  • Employed a semiconductor platform (highly doped layers, single quantum well).
  • Calculated resonances from electronic states governed by a 1D potential.

Main Results:

  • Accurately described quantum nature of electrons in semiconductor plasmonics.
  • Validated the quantum model against experimental spectra.
  • Observed higher-order longitudinal plasmonic modes.

Conclusions:

  • Plasmonic resonance energy in semiconductors depends on plasma energy and electron size confinement.
  • Demonstrated the significance of quantum confinement effects.
  • Paved the way for quantum engineering in semiconductor plasmonics.