Enhanced tunable terahertz Mie resonance and magnetoplasmonic effect through chain formation in ferrofluid

Yi An Wei, Pei Jung Wu, Po Yu Tsai, Kuen Lin Chen, Chan Shan Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present experimental and theoretical evidence demonstrating the Mie resonance effect in the terahertz (THz) range, utilizing Fe3O4/Kerosene ferrofluid. Our findings indicate a significant and rapid change in the complex refractive indices at 0.5 THz with an increase in the magnetic field strength. Moreover, we observed a prominent absorption peak at 0.5 THz in transmittance and absorption coefficient measurements, corresponding to a magnetic field intensity of 178.0 mT. This phenomenon occurs due to the adjustment of particle spacing, leading to resonance under different magnetic field conditions. These research results hold immense potential in advancing the development of magneto-optical THz modulators for imaging and communication applications.

Original languageEnglish
Article number091101
JournalApplied Physics Letters
Volume123
Issue number9
DOIs
Publication statusPublished - 2023 Aug 28

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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