Near-field mapping of complex-valued wavevectors of in-plane hyperbolic phonon polaritons in α-MoO3

Hyperbolic phonon polaritons (HPhPs) in α-phase molybdenum trioxide (α-MoO3) have recently attracted significant attention. They propagate anisotropically along the flake of α-MoO3 and show anomalously concave wavefronts when being excited by a pointlike source. Such anisotropic propagation is gover...

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Veröffentlicht in:	Applied physics letters 2022-03, Vol.120 (13)
Hauptverfasser:	Yuan, Zhu, Meng, Yunji, Ma, Weiliang, Chen, Runkun, Wang, Tao, Li, Peining
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied physics Flakes Microscopes Molybdenum trioxide Near field optical microscopes Optical microscopes Optical properties Phonons Polaritons Sine waves Trigonometric functions Wave fronts Wave functions Wave propagation
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