Martín Sánchez, J.; Duan, J.; Taboada Gutiérrez, J.; Álvarez Pérez, G.; Voronin, Kirill V.; Prieto, Iván; Ma, Weiliang; Bao, Qiaoliang; Volkov, Valentyn S.; Hillenbrand, Rainer; Nikitin, Alexey Y.; Alonso González, Pablo (American Association for the Advancement of Science, 2021-10)
[EN]Phonon polaritons (PhPs)-light coupled to lattice vibrations-with in-plane hyperbolic dispersion exhibit ray-like propagation with large wave vectors and enhanced density of optical states along certain directions on ...