Nanometer-scale Cavities for Mid-infrared Radiation via Image Phonon Polariton Resonators
arXiv:2503.04168 · doi:10.1021/acs.nanolett.5c01352
Abstract
Surface-polaritons play a pivotal role in strong light-matter interactions at the nanoscale due to their ability to confine light to deep subwavelength dimensions. A promising class of materials exhibiting such polaritonic response are polar dielectrics, which support surface phonon polaritons (SPhPs). While SPhPs offer significantly lower losses compared to other polaritons, their potential has been underutilized due to limited ability to reach large continent factors. Here, we demonstrate a system composed of silver nanocubes deposited on a SiC polar dielectric, which experimentally realizes the antisymmetric-image-phonon-polaritons (AIPhPs) mode: a hybridized SPhPs mode that can confine mid-infrared radiation to extremely small mode-volumes, almost a billion times smaller than their free-space volume, with quality-factors an order-of-magnitude greater than those of surface-plasmons or graphene-plasmons, surpassing values of 180. Our method is general, scalable, and applicable to any polar dielectric, opening the path for controlling and manipulating strong light-matter interactions at the nanoscale in the long-wavelength range.
References in corpus (28)
- Plasmonics in graphene at infra-red frequencies
- Optical nano-imaging of gate-tuneable graphene plasmons
- Mid-Infrared Plasmonic Biosensing with Graphene
- Polaritons in layered 2D materials
- Highly confined low-loss plasmons in graphene-boron nitride heterostructures
- Sub-diffractional, volume-confined polaritons in a natural hyperbolic material: hexagonal boron nitride
- Light interaction with photonic and plasmonic resonances
- Probing the Ultimate Plasmon Confinement Limits with a Van der Waals heterostructure
- Tuning quantum non-local effects in graphene plasmonics
- Ultra-confined acoustic THz graphene plasmons revealed by photocurrent nanoscopy
- Large-area, wide-angle, spectrally selective plasmonic absorber
- Exotic plasmon modes of double layer graphene
- Far-field Excitation of Single Graphene Plasmon Cavities with Ultra-compressed Mode-volumes
- Strong Coupling of Epsilon-Near-Zero Phonon Polaritons in Polar Dielectric Heterostructures
- Normalization, orthogonality and completeness of quasinormal modes of open systems: the case of electromagnetism
- Image polaritons in boron nitride for extreme polariton confinement with low losses
- High quality nanocavities through multimodal confinement of hyperbolic polaritons in hexagonal boron nitride
- Resonant enhancement of second harmonic generation in the mid-infrared using localized surface phonon polaritons in sub-diffractional nanostructures
- Acoustic plasmons in extrinsic free-standing graphene
- Real-space imaging of acoustic plasmons in large-area CVD graphene
- Highly Confined In-plane Exciton-Polaritons in Monolayer Semiconductors
- Acoustic Graphene Plasmon Nanoresonators for Field Enhanced Infrared Molecular Spectroscopy
- Direct characterization of near-field coupling in gap plasmon-based metasurfaces
- Near-field probing of image phonon-polaritons in hexagonal boron nitride on gold crystals
- Understanding the electromagnetic response of graphene/metallic nanostructures hybrids of different dimensionality
- In-plane Exciton Polaritons vs Plasmon Polaritons: Nonlocal corrections, confinement and loss
- 2D Semiconductors Superlattices as Hyperbolic Materials
- Electrically Tunable Interband Collective Excitations in Biased Bilayer and Trilayer Graphene