Quasi-fermi levels, chemical and electric potential profiles of a semiconductor under illumination

Santos, Anderson M.; Beliaev, D.; Scolfaro, L. M. R.; Leite, J. R.

doi:10.1590/s0103-97331999000400034

Cited by 3 publications

(2 citation statements)

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“…Light illumination of graphene leads to a new dynamic stage of charge carrier distribution characterized by the quasi-Fermi energy levels for electrons E F n and holes E F p . Proper calculation of these levels requires solving an ab initio problem or using semiclassical equations [48] for charge transport in graphene.…”

Section: Graphene Conductivitymentioning

confidence: 99%

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Graphene H-Waveguide for Terahertz Lasing Applications: Electromagnetic Quasi-Linear Theory

Kouzaev

2020

Nanomaterials

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A novel graphene H-waveguide is proposed for active terahertz components. A graphene film illuminated by strong pumping light shorts the parallel conductor plates. The terahertz modes propagating along this film are amplified at certain conditions. A rigorous electromagnetic (EM) quasi-linear method of analytical calculations of TEy and TMy eigenmodes is used in this paper to select these conditions. Among them is the use of bound TEy modes interacting with graphene plasmons at frequencies of negative graphene resistance, minimizing conductor loss associated with parallel plates, and excluding the current-crowding effect from the waveguide design. The limitations of the used theory are considered, and the applications of this waveguide are proposed.

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Section: Graphene Conductivitymentioning

confidence: 99%

“…The gain factor can reach the values of the order 1000 cm −1 , and it can be increased further using the multilayer graphene films and graphene-semiconductor heterostructures. Proper calculation of these levels requires solving an ab initio problem or using semiclassical equations [48] for charge transport in graphene.…”

Section: Graphene Conductivitymentioning

confidence: 99%