Optomagnetic Effect Induced by Magnetized Nanocavity Plasmon

Area of Science:

• Plasmonics and Nanophotonics
• Quantum Chemistry
• Molecular Spectroscopy

Background:

• Confined plasmonic fields in nanocavities offer unique light-matter interaction possibilities.
• Activating spin-forbidden transitions in molecules is challenging using conventional methods.

Purpose of the Study:

• To introduce and investigate a new optomagnetic effect driven by nanocavity plasmons.
• To demonstrate the activation of spin-forbidden molecular transitions using this effect.
• To explore the potential for controlling molecular excited states with different spin multiplicities.

Main Methods:

• Theoretical modeling of plasmonic fields within nanocavities.
• First-principles calculations to simulate optomagnetic effects on molecular transitions.
• Investigating transitions in C60 molecules as a model system.

Main Results:

• A highly confined plasmonic field in a nanocavity induces a significant dynamic magnetic field.
• This dynamic magnetic field can directly activate spin-forbidden transitions (e.g., singlet-to-triplet) in molecules.
• The intensity of activated spin-forbidden transitions can surpass that of allowed singlet-to-singlet transitions under specific conditions (plasmon distribution comparable to molecular size).

Conclusions:

• The proposed optomagnetic effect provides a novel pathway to engineer molecular excited states with tailored spin multiplicities.
• This work introduces a groundbreaking concept in light-matter interaction, potentially leading to new physical phenomena and technologies.