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Related Experiment Video

Updated: May 7, 2026

Fabrication and Operation of a Nano-Optical Conveyor Belt

Fabrication and Operation of a Nano-Optical Conveyor Belt

Published on: August 26, 2015

Spin Hall Nano-Antenna.

Raisa Fabiha¹, Pratap Kumar Pal², Michael Suche¹

¹Department of Electrical and Computer Engineering, Virginia Commonwealth University, Richmond, Virginia, USA.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|February 25, 2026

Summary

This summary is machine-generated.

Researchers developed a novel spin Hall nano-antenna (SHNA) that acts as a dual electromagnetic/acoustic antenna. This spintronics device enables extreme miniaturization for high-frequency signal transmission and reception.

Keywords:

inverse spin Hall effect magnon–photon coupling nano‐antenna spin Hall effect spin pumping spin–orbit torque

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Area of Science:

Spintronics
Nanotechnology
Electromagnetics

Background:

The spin Hall effect is crucial in spintronics, primarily for digital electronics.
Analog applications of the spin Hall effect are limited, with spin Hall nano-oscillators (SHNOs) being a notable exception.

Purpose of the Study:

To introduce a spin Hall nano-antenna (SHNA) as an analog of the SHNO.
To demonstrate the SHNA's capability for dual electromagnetic and acoustic wave radiation.
To explore the SHNA's potential for extreme antenna miniaturization.

Main Methods:

Fabrication of SHNAs using arrays of magnetostrictive nanomagnets and heavy metal nanostrips.
Utilizing the spin Hall effect to generate spin-orbit torques (SOTs) and induce magnetization oscillations (spin waves/magnons).
Investigating the conversion of magnons to photons for electromagnetic wave radiation and vice versa for reception via the AC inverse spin Hall effect.

Main Results:

The SHNA functions as a transmitting antenna by radiating high-frequency electromagnetic waves.
The SHNA can also radiate acoustic waves into a substrate if magnetostrictive materials are used.
The device exhibits anisotropic radiation patterns despite its sub-wavelength size.
The SHNA operates as a receiving antenna, converting incident electromagnetic radiation into alternating voltage.
The SHNA demonstrates significantly higher transmitting/receiving gain and radiation efficiency compared to conventional antennas of similar size.

Conclusions:

The spin Hall nano-antenna (SHNA) represents a significant advancement in analog spintronics applications.
The SHNA's dual electromagnetic/acoustic nature and high efficiency enable unprecedented antenna miniaturization.
This technology holds promise for future high-frequency communication and sensing systems.