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Related Concept Videos

Non-ohmic Devices00:51

Non-ohmic Devices

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In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
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There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
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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
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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Direct on-Chip Optical Communication between Nano Optoelectronic Devices.

Vidar Flodgren1,2, Abhijit Das1,2, Joachim E Sestoft3

  • 1NanoLund, Lund University, Box 118, 22100 Lund, Sweden.

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Summary
This summary is machine-generated.

Researchers demonstrated on-chip optical communication using indium phosphide (InP) nanowires, enabling efficient photonic neuromorphic solutions. This breakthrough paves the way for low-power, high-performance computing with potential applications in neural networks.

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Area of Science:

  • Optoelectronics
  • Nanotechnology
  • Photonic Computing

Background:

  • On-chip optical communication is crucial for energy-efficient photonic neuromorphic systems.
  • Integrating nanoscale photon emitters and receivers for communication is an underexplored area.

Purpose of the Study:

  • To demonstrate direct on-chip light broadcasting between individual indium phosphide (InP) nanowire photodiodes on silicon.
  • To evaluate the performance and potential of nanowire-based optical communication circuits.

Main Methods:

  • Fabrication of indium phosphide (InP) nanowire photodiodes on silicon.
  • Demonstration of directional light broadcasting between individual nanowires.
  • Mapping of wire-to-wire communication circuit performance.

Main Results:

  • Achieved robust on-chip communication with up to 5-bit resolution.
  • Demonstrated a low driving power of 0.5 μW for continuous operation.
  • Estimated energy per operation of ~1 fJ and signal fan-out to hundreds of nodes.

Conclusions:

  • Indium phosphide (InP) nanowire circuits meet the requirements for bioderived neural networks.
  • This technology offers a path towards highly efficient, scalable photonic neuromorphic computing.
  • Theoretical modeling identified key areas for future performance improvements.