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Related Concept Videos

MOSFET01:16

MOSFET

The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
MOSFET Amplifiers01:17

MOSFET Amplifiers

The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
Characteristics of MOSFET01:17

Characteristics of MOSFET

Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable quicker...
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity arises...
MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...

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Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Nanolasers grown on silicon-based MOSFETs.

Fanglu Lu1, Thai-Truong D Tran, Wai Son Ko

  • 1Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, USA.

Optics Express
|June 21, 2012
PubMed
Summary

Novel indium gallium arsenide (InGaAs) nanopillar lasers were grown on silicon-based metal-oxide-semiconductor field-effect transistors (MOSFETs). This demonstrates the first monolithic integration of lasers and transistors on a single silicon chip for advanced integrated circuits.

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Area of Science:

  • Semiconductor Physics
  • Materials Science
  • Optoelectronics

Background:

  • Monolithic integration of optoelectronic devices with silicon complementary metal-oxide-semiconductor (CMOS) technology is crucial for advanced computing and communication systems.
  • Indium gallium arsenide (InGaAs) is a key material for laser applications, but its integration with silicon has been challenging.

Purpose of the Study:

  • To demonstrate the monolithic integration of InGaAs nanopillar lasers with functional silicon MOSFETs.
  • To achieve room-temperature operation of these integrated devices.
  • To show the compatibility of this integration process with CMOS technology.

Main Methods:

  • Low-temperature (410 °C) monolithic growth of InGaAs nanopillar lasers directly on (100)-silicon-based MOSFETs.
  • Characterization of MOSFET performance post-nanopillar growth.
  • Optical pumping experiments to assess laser operation.

Main Results:

  • Successful monolithic growth of InGaAs nanopillar lasers on silicon MOSFETs.
  • Preservation of MOSFET functionality after laser integration, confirming CMOS compatibility.
  • Achieved room-temperature operation of optically pumped lasers.

Conclusions:

  • This work presents the first demonstration of monolithically integrated lasers and transistors on the same silicon chip.
  • The developed low-temperature growth process is compatible with CMOS fabrication.
  • This integration serves as a proof-of-concept for extending to more complex CMOS integrated circuits.