Highly confined phonon polaritons in monolayers of oxide perovskites

Abstract

Two-dimensional (2D) materials are able to strongly confine light hybridized with collective excitations of atoms, enabling electric-field enhancements and novel spectroscopic applications. Recently, freestanding monolayers of oxide perovskites have been synthesized, which possess highly infrared-active phonon modes and a complex interplay of competing interactions. In this study, we evaluate central figures of merit for phonon polaritons in the tetragonal phases of the 2D perovskites SrTiO${}_3$, KTaO${}_3$, and LiNbO${}_3$, using density functional theory calculations. Specifically, we compute the 2D phonon-polariton dispersions, the propagation-quality, confinement, and deceleration factors, and we show that they are comparable to those found in the prototypical 2D dielectric hexagonal boron nitride. Our results suggest that monolayers of oxide perovskites are promising candidates for polaritonic platforms in the terahertz spectral range that enable possibilites to control complex phases of matter through strongly enhanced electromagnetic fields.

References in corpus (34)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Phonons and related properties of extended systems from density-functional perturbation theory
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• 2D materials and van der Waals heterostructures
• Optimized norm-conserving Vanderbilt pseudopotentials
• The PseudoDojo: Training and grading a 85 element optimized norm-conserving pseudopotential table
• Plasmonics in graphene at infra-red frequencies
• Magnetic 2D materials and heterostructures
• Distribution of phonon lifetime in Brillouin zone
• Polaritons in layered 2D materials
• Highly confined low-loss plasmons in graphene-boron nitride heterostructures
• Assessing the Performance of Recent Density Functionals for Bulk Solids
• Broadband electro-optic frequency comb generation in an integrated microring resonator
• Sub-diffractional, volume-confined polaritons in a natural hyperbolic material: hexagonal boron nitride
• Graphene on hexagonal boron nitride as a tunable hyperbolic metamaterial
• Terahertz-Field-Induced Ferroelectricity in Quantum Paraelectric SrTiO${}_3$
• Metastable ferroelectricity in optically strained $SrTi{O}_3$
• Light-matter interactions with photonic quasiparticles
• Density functional perturbation theory for gated two-dimensional heterostructures: Theoretical developments and application to flexural phonons in graphene
• Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics
• Quantum Electrodynamic Control of Matter: Cavity-Enhanced Ferroelectric Phase Transition
• Breakdown of optical phonons' splitting in two-dimensional materials
• Phonon thermal Hall effect in strontium titanate
• The Ferroelectric Photo-Groundstate of SrTiO${}_3$: Cavity Materials Engineering
• Giant strain gradient elasticity in SrTiO3 membranes: bending versus stretching
• Multiferroic Quantum Criticality
• Phonon polaritonics in two-dimensional materials
• Ultrafast reversal of the ferroelectric polarization by a midinfrared pulse
• Tunable Magnetism and Insulator-Metal Transition in Bilayer Perovskites
• Strain-Induced Room-Temperature Ferroelectricity in SrTiO${}_3$ Membranes
• Buried Moire supercells through SrTiO${}_3$ nanolayer relaxation
• Giant Polarization and Abnormal Flexural Deformation in Bent Freestanding Perovskite Oxides
• Ab initio calculation of phonon polaritons in silicon carbide and boron nitride
• Stable structures and electronic properties of perovskite oxide monolayers

Cited by in corpus (7)

• Cavity magnon-polaritons in cuprate parent compounds
• Observation of the Breakdown of Optical Phonon Splitting in a Two-dimensional Polar Monolayer
• Thermal and electrostatic tuning of surface phonon-polaritons in LaAlO3/SrTiO3 heterostructures
• Exact Ansatz of Fermion-Boson Systems for a Quantum Device
• Low-loss far-infrared surface phonon polaritons in suspended SrTiO3 nanomembranes
• Strongly confined Mid-infrared to Terahertz Phonon Polaritons in Ultra-thin SrTiO3
• Two-dimensional moiré phonon polaritons