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2D Material-Enabled Optical Rectennas with Ultrastrong Light-Electron Coupling.

Hai-Thai Nguyen1, Zhi-Long Yen2, Yen-Hsun Su1

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Small (Weinheim an Der Bergstrasse, Germany)
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Summary
This summary is machine-generated.

This study demonstrates 2D materials for on-chip optical rectennas, enabling efficient visible light rectification and photodetection. These devices show tunable performance and enhanced photon-electron coupling for advanced applications.

Keywords:
2D-materialslateral MIMrectenna

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Optical rectennas enable electromagnetic wave rectification in the visible spectrum for photodetection and energy harvesting.
  • Two-dimensional (2D) materials offer potential for miniaturized, high-performance optical rectenna devices.

Purpose of the Study:

  • To demonstrate the feasibility of 2D materials for on-chip optical rectennas.
  • To investigate the performance and tunability of 2D material-based rectennas.
  • To explore their potential for quantum computing applications.

Main Methods:

  • Fabrication of lateral Metal-Insulator-Metal (MIM) structures using a self-aligned patterning process with a nanometer-sized air gap.
  • Integration of 2D materials as a contact material separated from a metal electrode.
  • Utilizing electrostatic gating for performance adjustment and band alignment optimization.
  • Characterization of rectenna performance across various wavelengths and polarization states.

Main Results:

  • Achieved strong rectification at approximately 500 nm wavelengths with clear polarization control.
  • Demonstrated tunable rectenna performance through electrostatic gating.
  • Observed a tenfold increase in photon-electron coupling compared to nanotube-based rectennas, validated by a photon-assisted tunneling model.
  • Scalable production of large arrays using established microfabrication techniques.

Conclusions:

  • 2D materials show significant promise for developing high-performance, on-chip optical rectennas.
  • The demonstrated devices offer tunable performance and enhanced photon-electron coupling, surpassing previous technologies.
  • These advancements pave the way for future applications in quantum computing and advanced optoelectronic systems.