High-Verdet Constant and Low-Optical Loss Tb3+ Doped Magnetite Nanoparticles.
Nano Lett
; 24(30): 9163-9168, 2024 Jul 31.
Article
em En
| MEDLINE
| ID: mdl-39037721
ABSTRACT
Magneto-optical (MO) polymer nanocomposites have emerged as alternatives to conventional MO crystals, particularly in nanophotonics applications, thanks to their better processing flexibility and superior Verdet constants. However, a higher Verdet constant commonly comes with excessive optical loss due to increased absorption and scattering, resulting in a constant or reduced figure-of-merit (FOM) defined as the Verdet constant over optical loss. By doping magnetite (Fe3O4) nanoparticles with Tb3+ ions, we report a new strategy to enhance the Verdet constant without increasing the optical loss. The Fe3O4Tb3+ nanocomposite is one of a kind that simultaneously achieves a state-of-the-art Verdet constant of 5.6 × 105 °/T·m and a state-of-the-art FOM of 31°/T in the near-infrared region.
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MEDLINE
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En
Ano de publicação:
2024
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Article