Hybrid Graphene-Gyroelectric Structures: A Novel Platform for THz Applications

Heydari, Mohammad Bagher

doi:10.48550/arxiv.2201.06538

Cited by 1 publication

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“…SPPs are formed by strong coupling of the light and free electrons, which have many interesting applications such as couplers [6][7][8], filters [9][10][11], resonators [12][13][14], and circulators [15][16][17][18], waveguide [19][20][21][22][23][24][25], sensors [26][27][28][29][30][31], metamaterials [32], and imaging [33,34]. Among these devices, graphene-based waveguides play a remarkable role in plasmonics and have various platforms such as planar [21,[35][36][37][38][39][40][41][42][43][44][45], cylindrical [46][47][48][49][50][51][52], and elliptical structures …”

Section: Introductionmentioning

confidence: 99%

Tunable Plasmon-Phonon Modes in Nonlinear-Graphene-hBN Heterostructures

Heydari

Karimipour

Shirkolaei

2022

Preprint

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In this paper, the analytical expressions are derived for the study of Hybrid Surface Phonon-Plasmon-Polaritons (HSP3) in a nonlinear graphene-based structure with hexagonal Boron Nitride (hBN) layers. The numerical results show that the propagation features of HSP3 can be varied by changing the chemical potential, the relaxation time, and the nonlinear coefficient. Due to the existence of hBN layers in the proposed structure, the investigation is done in two frequency ranges: the upper and lower Reststrahlen bands. The obtained results represent that two kinds of hybrid modes propagate outside the upper and lower Reststrahlen bands which we call “higher and lower modes”. However, only one propagating mode is seen inside the upper or lower Reststrahlen band. A high value of FOM=98 is reported at the frequency of 45 THz (inside the upper Reststrahlen band) for the chemical potential of 0.35 eV. The authors believe that the analytical study done on HSP3 in this paper can help the researchers to design innovative structures such as sensors in the mid-infrared region.

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