Dynamic tuning of Bloch modes in anisotropic phonon polaritonic crystals
Polaritons—hybrid light-matter particles—allow light to be squeezed into deep subwavelength scales, holding great promise for ultra-compact photonic devices. By structuring materials into periodic crystals, known as polaritonic crystals (PoCs), researchers can engineer exotic optical modes called Bloch modes for enhanced light control. However, once fabricated, these crystals and their Bloch modes are fixed, lacking the dynamic tunability required for adaptive optical devices. While graphene supports highly tunable plasmon polaritons, their performance is limited by substantial optical ...