Direct programming of confined Surface Phonon Polariton Resonators using the plasmonic Phase-Change Material In${}_3$SbTe${}_2$

Abstract

Tailoring light-matter interaction is essential to realize nanophotonic components. It can be achieved with surface phonon polaritons (SPhPs), an excitation of photons coupled with phonons of polar crystals, which also occur in 2d materials such as hexagonal boron nitride or anisotropic crystals. Ultra-confined resonances are observed by restricting the SPhPs to cavities. Phase-change materials (PCMs) enable non-volatile programming of these cavities based on a change in the refractive index. Recently, the new plasmonic PCM In${}_3$SbTe${}_2$ (IST) was introduced which can be reversibly switched from an amorphous dielectric state to a crystalline metallic one in the entire infrared to realize numerous nanoantenna geometries. However, reconfiguring SPhP resonators to modify the confined polaritons modes remains elusive. Here, we demonstrate direct programming of confined SPhP resonators by phase-switching IST on top of a polar silicon carbide crystal and investigate the strongly confined resonance modes with scanning near-field optical microscopy. Reconfiguring the size of the resonators themselves result in enhanced mode confinements up to a value of $\lambda /35$. Finally, unconventional cavity shapes with complex field patterns are explored as well. This study is a first step towards rapid prototyping of reconfigurable SPhP resonators that can be easily transferred to hyperbolic and anisotropic 2d materials.

arXiv commentMain Manuscript 16 pages, 5 figures, SI 15 pages

References in corpus (18)

• Observation of topological polaritons and photonic magic angles in twisted van der Waals bi-layers
• Graphene on hexagonal boron nitride as a tunable hyperbolic metamaterial
• Hyperbolic phonon-polaritons in boron nitride for near-field optical imaging
• Infrared nanoscopy of Dirac plasmons at the graphene-SiO2 interface
• Infrared hyperbolic metasurface based on nanostructured van der Waals materials
• Ultra-low-loss Polaritons in Isotopically Pure Materials: A New Approach
• Boron nitride nanoresonators for phonon-enhanced molecular vibrational spectroscopy at the strong coupling limit
• Configure polaritons in twisted $\alpha$-MoO3
• Broad Spectral Tuning of Ultra-Low Loss Polaritons in a van der Waals Crystal by Intercalation
• Twisted Nano-optics: Manipulating Light at the Nanoscale with Twisted Phonon Polaritonic Slabs
• Reconfigurable Mid-Infrared Hyperbolic Metasurfaces using Phase-Change Materials
• Polariton Nanophotonics using Phase Change Materials
• Active Tuning of Surface Phonon Polariton Resonances via Carrier Photoinjection
• Circular Optical Nanoantennas: An Analytical Theory
• 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
• Radiative thermal switch exploiting hyperbolic surface phonon polaritons
• Experimental observation of ABCB stacked tetralayer graphene

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