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Microscale Chiral Rectennas for Energy Harvesting.

Manuel Suárez-Rodríguez¹, Beatriz Martín-García^1,2, Witold Skowroński³

¹CIC nanoGUNE BRTA, Donostia-San Sebastián, Basque Country, 20018, Spain.

Advanced Materials (Deerfield Beach, Fla.)

|April 10, 2024

Summary

This summary is machine-generated.

Researchers developed a microscale wireless rectifier using chiral tellurium, enabling efficient power harvesting for Internet of Things (IoT) devices at GHz frequencies with low input power. This single-material device offers tuneable rectification, paving the way for miniaturized electronics.

Keywords:

chirality low symmetry non‐linear conductivity radiofrequency rectification tellurium

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Area of Science:

Materials Science
Electrical Engineering
Physics

Background:

Wireless radiofrequency rectifiers are crucial for powering Internet of Things (IoT) devices by harvesting ambient electromagnetic radiation.
Current Schottky diode-based rectifiers have limitations in high-frequency, low-power applications, necessitating bulky antennas and hindering miniaturization.

Purpose of the Study:

To demonstrate wireless rectification at GHz frequencies using a microscale device based on single chiral tellurium.
To investigate the origin of rectification in tellurium and explore its tuneability for advanced applications.

Main Methods:

Fabrication of a microscale device using single chiral tellurium.
Characterization of wireless rectification performance at GHz frequencies and extremely low input powers.
Analysis of crystal symmetry and temperature dependence to understand the rectification mechanism.
Investigation of electrostatic gate modulation on rectification output.

Main Results:

Achieved wireless rectification at GHz frequencies in a microscale tellurium device with ultra-low input power.
Demonstrated that the rectification originates from the intrinsic nonlinear conductivity of tellurium, linked to its crystal symmetry.
Showcased the ability to electrostatically tune the rectification output.

Conclusions:

Single chiral tellurium enables efficient, tuneable microscale wireless rectification at GHz frequencies.
The intrinsic nonlinear conductivity of tellurium is key to its performance, offering a pathway to miniaturized, gate-tunable power harvesting solutions for IoT.