多晶相BN范德瓦耳斯异质结构中的双曲声子极化激元调控OA

Phonon polaritons are hybrid quasiparticles arising from the coupling between infrared photons and lattice vibrations,enabling strong subwavelength confinement of electro-magnetic fields.This unique property makes them highly promising for nanoscale manipulation of infrared light and enhanced light-matter interactions.In this work,we theoretically inves-tigate hyperbolic phonon polariton in various boron nitride(BN)systems.Van der Waals het-erostructures are constructed by combining different BN materials,including h10BN,h11BN,pyrolytic boron nitride,and wurtzite boron nitride,and further integrated with α-MoO3.We systematically analyze the effects of material composition,stacking sequence,and layer thick-ness on polariton dispersion,interlayer coupling,and interfacial hybridization.The influence of isotopic mass variation,crystal disorder-induced damping,and phase-dependent dielec-tric responses is first examined through intrinsic dispersion comparisons.Our results reveal that multilayer BN heterostructures enable tunable mode hybridization,leading to disper-sion reconstruction,including branch rearrangement and spectral redistribution.When cou-pled with α-MoO3,the system exhibits multiple dispersion bandgaps and low group-velocity branches under specific conditions,arising from strong multimode coupling.These findings demonstrate that material selection,stacking configuration,and thickness engineering provide versatile degrees of freedom for tailoring hyperbolic phonon polaritons,offering valuable theo-retical guidance for infrared polariton engineering in complex van der Waals heterostructures.