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Optical and Quantum Electronics
Erschienen in: Optical and Quantum Electronics 5/2019

01.05.2019

Resonant peak splitting in finite periodic superlattices with an unit cell of two barriers and two wells on monolayer graphene

verfasst von: H. Z. Xu, S. Feng, Y. Zhang

Erschienen in: Optical and Quantum Electronics | Ausgabe 5/2019

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Abstract

The general expressions for transmission probability and resonant peaks in one-dimensional N-periods graphene superlattice with unit cell of two barriers and two wells are analytically derived, and two types of resonant peaks are obtained: (1) the periodicity induced resonant peaks splitting of (N − 1)-fold as N increases; and (2) the resonant peak through a unit cell unchanged as N varies. As the two-barriers in unit cell become asymmetric, the resonance transmission probability of unit cell becomes imperfect (T1 < 1), which drops quickly with the unit asymmetry increases. Thus, the unit cell related resonant peak could only be observed in superlattices with less unit cell asymmetry of a few of period numbers. With the period increases, the unit related resonant peak disappears and only periodicity induced (N − 1)-fold splitting remains. The splitting rule is further confirmed by the conductance and noise versus the incident energy and the misunderstandings in publication domain is cleared up.
Vorheriger Artikel Comments on Zihang Zhu, Shanghong Zhao, Xuan Li, and Kun Qu, Tao Lin, “Photonic generation of frequency-octupled microwave signal with reduced electrical local oscillator power and improved spectrum purity” Opt. Quant. Electron (2017)
Nächster Artikel Design of refractive index sensing based on 2D PhC air-slot width-modulated line-defect microcavity

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Metadaten
Titel
Resonant peak splitting in finite periodic superlattices with an unit cell of two barriers and two wells on monolayer graphene
verfasst von
H. Z. Xu
S. Feng
Y. Zhang
Publikationsdatum
01.05.2019
Verlag
Springer US
Erschienen in
Optical and Quantum Electronics / Ausgabe 5/2019
Print ISSN: 0306-8919
Elektronische ISSN: 1572-817X
DOI
https://doi.org/10.1007/s11082-019-1873-1

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