Magneto-Optical Readout of a Chiral Single-Molecule Magnet at Telecom Wavelengths

Area of Science:

• Molecular Magnetism
• Optical Physics
• Materials Science

Background:

• Magneto-chiral dichroism (MChD) is an optical technique for reading magnetic hysteresis.
• Extending MChD to the near-infrared (NIR) telecom range is desirable for low-loss optical data transmission.

Purpose of the Study:

• To extend MChD-based optical readout to the NIR telecom wavelength range.
• To investigate a new air-stable chiral single-molecule magnet (SMM) for NIR MChD applications.

Main Methods:

• Synthesis and characterization of a new chiral SMM: (S)- and (R)-[Dy(bbppn)Cl].
• Optical detection of magnetic hysteresis using MChD in the NIR region.
• Investigation of Dy(III) f-f transitions in the NIR spectrum.

Main Results:

• Successfully demonstrated MChD-based optical readout of magnetic hysteresis for the new SMM in the NIR range.
• Confirmed the effectiveness of MChD across a broader spectral window, including NIR.
• Showcased optical detection despite rapid quantum tunneling of magnetization (QTM) at zero field.

Conclusions:

• MChD is a robust and generalizable optical readout method for molecular magnetic materials.
• The findings support MChD's potential for polarization-free optical data readout.
• This research opens possibilities for optical communication at telecom wavelengths using molecular magnets.