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Oxides for Rectenna Technology.

Ivona Z Mitrovic1, Saeed Almalki1, Serdar B Tekin1

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|September 28, 2021
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Summary
This summary is machine-generated.

Researchers are developing self-biased rectennas to harvest infrared energy. Metal Insulator Metal (MIM) diodes are key components, enabling efficient conversion of infrared AC signals to DC power using femtosecond tunneling.

Keywords:
MIMdiodeenergy harvestinginfraredoxiderectennaterahertz

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Renewable Energy

Background:

  • Harvesting renewable infrared energy requires efficient rectennas.
  • Self-biased rectennas eliminate the need for external voltage sources.
  • Metal Insulator Metal (MIM) diodes offer high-speed rectification for terahertz and infrared signals.

Purpose of the Study:

  • To review single, double, and triple insulator MIM diodes for rectenna applications.
  • To focus on key performance metrics like zero-bias responsivity and dynamic resistance.
  • To explore material combinations and fabrication impacts on MIM diode performance.

Main Methods:

  • Fabrication and characterization of single, double, and triple insulator MIM diodes.
  • Analysis of figures of merit including zero-bias responsivity (β₀), zero-bias dynamic resistance (R₀), and asymmetry.
  • Investigation of various oxide materials such as NiO, Al₂O₃, HfO₂, Ta₂O₅, Nb₂O₅, ZnO, TiO₂, Co₃O₄, and TiOₓ.

Main Results:

  • MIM diodes utilize femtosecond tunneling for fast current transport and high response times.
  • NiO and Al₂O₃ are primary oxide choices, combined with other oxides like HfO₂, Ta₂O₅, Nb₂O₅, ZnO, and TiO₂.
  • Optimized MI²M diodes in advanced rectennas demonstrate the importance of precise control over oxide stoichiometry and sub-nanometer thicknesses.

Conclusions:

  • MIM diodes are crucial for developing efficient self-biased rectennas for infrared energy harvesting.
  • Tailoring oxide stoichiometry and thickness to sub-nanometer precision is essential for optimizing MIM diode performance.
  • Advanced fabrication techniques are key to achieving high responsivity and dynamic resistance for practical rectenna systems.