Observation of Localized Resonant Phonon Polaritons in Biaxial α-MoO₃ Nanoparticles.

ABSTRACT: Anisotropic subwavelength particles uniquely combine the strong, tunable response of nanostructures with the exotic properties of anisotropic materials, enabling diverse applications in photonics, biomedicine, and magnetism. Anisotropic particles are also prevalent in systems such as ice grains, liquid crystal droplets, and ferromagnetic particles. Nanostructures supporting hyperbolic phonon-polaritons hold significant promise for infrared applications due to their strong anisotropic optical response. However, previous experiments primarily explored isotropic or uniaxial nanostructures, with eigenmode theories limited to isotropic particles, restricting the understanding and applicability of anisotropic particles. Here, localized phonon resonances in the mid-infrared spectral region in bia

SUBMITTER: Beitner D 

PROVIDER: S-EPMC12631883 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature