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Photoemission-based microelectronic devices.

Ebrahim Forati1, Tyler J Dill2, Andrea R Tao2

  • 1Electrical and Computer Engineering Department, University of California San Diego, La Jolla, California 92098-0407, USA.

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Researchers developed novel photoemission-based microelectronic devices. Using a low-power infrared laser and engineered surfaces, these devices overcome semiconductor limitations for faster, more powerful electronics.

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Area of Science:

  • Microelectronic devices
  • Quantum tunneling
  • Photoemission

Background:

  • Modern microelectronics rely on semiconductor carriers, limiting performance due to inherent properties like band gap and electron velocity.
  • Scaling speed, wavelength, and power requires overcoming semiconductor limitations, potentially through gas or vacuum channels.
  • Generating electrons in gas/vacuum for practical devices typically demands high energy inputs like heat, high voltages, or powerful lasers.

Purpose of the Study:

  • To demonstrate a novel method for implementing microelectronic devices using photoemission.
  • To overcome the challenges of electron liberation in gas/vacuum environments for practical applications.
  • To leverage the benefits of gas-plasma/vacuum electronics while maintaining integrability.

Main Methods:

  • Utilizing an engineered resonant surface to interact with a low-power infrared laser.
  • Inducing photoemission via electron tunneling through the engineered surface.
  • Implementing device functionalities such as transistors, switches, and modulators based on this photoemission mechanism.

Main Results:

  • Achieved sufficient photoemission via electron tunneling using a low-power infrared laser and engineered resonant surfaces.
  • Demonstrated the feasibility of creating microelectronic devices like transistors, switches, and modulators.
  • Showcased a method that bypasses the need for high energy inputs typically required for gas/vacuum electron emission.

Conclusions:

  • Engineered resonant surfaces interacting with low-power infrared lasers enable practical photoemission-based microelectronic devices.
  • These devices offer a pathway to surpass the performance limits of conventional semiconductor devices.
  • The proposed technology combines the advantages of gas-plasma/vacuum electronics with the integrability of semiconductor devices.