Surface Phonon Polariton Modes in Suspended Monolayer Hexagonal Boron Nitrides

Abstract

Dispersion properties and characteristics of transverse magnetic (TM) and transverse electric (TE) surface phonon polaritons (SPhP) in suspended monolayer hexagonal boron nitrides (hBN) was studied extensively. The analytical results show that the hBN based TM (TE) phonon polaritons exist in restsrahlen bands when imaginary surface conductivity is positive. The effective mode index of TM phonon polaritons is much higher than that of TE phonon polaritons with respective values of and which makes TM SPhP more promising in the practical realization. In addition, the propagation length of TE SPhP is less lossy and surpass that of TM SPhP by factor of . This study compares these important properties and sheds more insight into their applications in optical communications, photonics and optoelectronics devices.

Keywords

• phonon polaritons
• hexagonal boron nitrides
• skin depth
• transverse electric
• ultrathin