Effects of inter-subband couplings on bound and extended states of terahertz cascade structures | Zendy

Camille Ndebeka-Bandou | Zendy; Francesca Carosella | Zendy; G. Bastard | Zendy

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Effects of inter-subband couplings on bound and extended states of terahertz cascade structures

Author(s) -

Camille Ndebeka-Bandou,

Francesca Carosella,

G. Bastard

Publication year - 2016

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4942848

Subject(s) - terahertz radiation , cascade , imperfect , eigenvalues and eigenvectors , heterojunction , absorption (acoustics) , physics , condensed matter physics , optoelectronics , chemistry , quantum mechanics , optics , philosophy , chromatography , linguistics

International audienceWe theoretically analyze the effect of inter-subband couplings on the eigenstates of a terahertz heterostructure in the presence of coulombic donors. We find that the inter-subband electron-donor interaction causes a drastic reorganization of the eigenenergies and a strong admixture between the subbands that decisively influences the optical absorption spectrum of the structure. These results illustrate the importance of the inter-subband couplings in the formulation of the eigenstates of imperfect terahertz heterostructures

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