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- Title
Mixing of states in quantum wells for terahertz polariton emitters.
- Authors
Iorsh, I. V.; Kaliteevski, M. A.; Ivanov, K. A.; Kavokin, K. V.
- Abstract
Two possible InGaAs/GaAs quantum-well structures ensuring the presence of radiative transitions between the polariton states in a microresonator with a quantum well, which are accompanied by generation of terahertz photons, are discussed in this work. For the first structure, symmetry breakdown that is required for the emission of a terahertz photon is conducted in a quantum well with refractive index gradient profile, which results in mixing of the states of a polariton and a dark exciton. Parameters of the quantum well, in which the energy of the second exciton level corresponds to the upper polariton energy, are determined. A double quantum well with exciton states split due to quantum-mechanical tunneling through a barrier is used in the second structure. Symmetry breakdown, which allows one to mix an exciton with a “dark” exciton, is ensured by adjusting the energy of electron levels in a double quantum well by applying an electric field to the structure. A hole remains localized in one of the wells.
- Subjects
QUANTUM wells; PHASES of matter; TERAHERTZ technology; POLARITONS; PHONON emissions; QUANTUM mechanics
- Publication
Technical Physics Letters, 2013, Vol 39, Issue 8, p694
- ISSN
1063-7850
- Publication type
Article
- DOI
10.1134/S1063785013080075