Group velocity modulation and wavelength tuning of phonon-polaritons by engineering dielectric-metallic substrates

Flávio H. Feres, Rafael A. Mayer, Ingrid D. Barcelos +2

In analogy to the observed for single plasmon-polaritons, we show that subdiffractional hyperbolic phonon-polariton (HP2) modes confined in hexagonal boron nitride (hBN) nanocrysta…