Organic Magnetoelectroluminescence for Room Temperature Transduction between Magnetic and Optical Information

TL;DR

This paper demonstrates a novel method for room temperature transduction between magnetic and optical signals using an organic light emitting diode, leveraging the magnet's remanent field to control exciton recombination without electrical current.

Contribution

It introduces a new approach for magnetic-optical transduction in organics that operates at room temperature without electrical current, overcoming previous limitations.

Findings

Successful room temperature transduction between magnetic and optical signals.

Control of exciton recombination via remanent magnetic field.

No electrical current required for the transduction process.

Abstract

Magnetic and spin-based technologies for data storage and processing pose unique challenges for information transduction to light because of magnetic metals' optical loss, and the inefficiency and resistivity of semiconductor spin-based emitters at room temperature. Transduction between magnetic and optical information in typical organic semiconductors poses additional challenges as the Faraday and Kerr magnetooptical effects rely on the electronic spin-orbit interaction, and the spin-orbit interaction in organics is weak. Other methods of coupling light and spin have emerged in organics, however, as the spin-dependent character of exciton recombination, with spin injection from magnetic electrodes, provides magnetization-sensitive light emission, although such approaches have been limited to low temperature and low polarization efficiency. Here we demonstrate room temperature information transduction between a magnet and an organic light emitting diode that does not require electrical current, based on control via the magnet's remanent field of the exciton recombination process in the organic semiconductor.