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Related Concept Videos

Field Effect Transistor01:29

Field Effect Transistor

Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...

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Nanometer size field effect transistors for terahertz detectors.

W Knap1, S Rumyantsev, M S Vitiello

  • 1Laboratoire Charles Coulomb, UMR 5221, Université Montpellier 2 and CNRS, F-34950 Montpellier, France. knap.wojciech@gmail.com

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Nanometer field-effect transistors (FETs) can detect terahertz radiation efficiently. These devices function as detectors, mixers, and more at frequencies beyond their typical limits.

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Area of Science:

  • Terahertz (THz) technology
  • Semiconductor device physics

Background:

  • Field-effect transistors (FETs) are fundamental semiconductor devices.
  • Terahertz (THz) radiation detection is crucial for various scientific and technological applications.
  • Standard THz detectors often face limitations in terms of bandwidth, efficiency, or operating frequency.

Purpose of the Study:

  • To provide an overview of recent advancements in applying nanometer-scale FETs for THz detection.
  • To highlight the capabilities of nano-FETs as THz detectors, mixers, phase shifters, and frequency multipliers.

Main Methods:

  • Review of recent research results on nanometer-scale field-effect transistors.
  • Analysis of device performance at terahertz frequencies.

Main Results:

  • Nanometer-scale FETs demonstrate efficient operation as terahertz detectors.
  • These devices exhibit functionality as broadband or resonant THz detectors.
  • Nano-FETs can operate effectively at frequencies significantly exceeding their fundamental cut-off frequency.

Conclusions:

  • Nanometer-scale FETs are promising for advanced terahertz applications.
  • The versatility of nano-FETs extends to detection, mixing, phase shifting, and frequency multiplication.
  • Further research into nano-FETs can unlock new possibilities in terahertz science and technology.