Near-unity light-matter interaction in mid-infrared van der Waals nanocavities
arXiv:2308.16492 · doi:10.1021/acs.nanolett.3c04118
Abstract
Accessing mid-infrared radiation is of great importance for a range of applications, including thermal imaging, sensing, and radiative cooling. Here, we study light interaction with hexagonal boron nitride nanocavities and reveal strong and tunable resonances across its hyperbolic transition. In addition to conventional phonon-polariton excitations, we demonstrate that the high refractive index of hexagonal boron nitride outside the Reststrahlen band allows enhanced light-matter interactions in deep subwavelength (<λ/15) nanostructures across a broad 7-8 μm range. Near-unity absorption and high quality (Q>80) resonance interaction in the vicinity of the transverse optical phonon is observed. Our study provides new avenues to design highly efficient and ultracompact structures for controlling mid-infrared radiation and accessing strong light-matter interaction.
14 pages, 4 figures
References in corpus (10)
- Graphene plasmonics
- Graphene Plasmonics for Terahertz to Mid-Infrared Applications
- Mid-Infrared Plasmonic Biosensing with Graphene
- Infrared hyperbolic metasurface based on nanostructured van der Waals materials
- Thermophotovoltaic Efficiency of 40%
- Hybridized hyperbolic surface phonon polaritons at α-MoO3 and polar dielectric interfaces
- Light-Matter Coupling in Scalable Van der Waals Superlattices
- In-plane hyperbolic polariton tuners in terahertz and long-wave infrared regimes
- Hyper-doped silicon nanoantennas and metasurfaces for tunable infrared plasmonics
- Atomic-Void van der Waals Channel Waveguides