Nonlinear terahertz properties of n-type quantum-well heterostructures

In this letter, we study the effect of many body interactions on the collective response of confined electrons in doped quantum-well (QW) heterostructures to intense far-infrared radiation. Absorption lineshapes are computed both by numerically integrating the equations of motion and by using the ap...

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Detalles Bibliográficos
Autores principales: Batista, A.A., Tamborenea, P.I., Birnir, B., Citrin, D.S.
Formato: JOUR
Materias:
Approximation theory
Bifurcation (mathematics)
Electrons
Equations of motion
Infrared radiation
Integration
Light absorption
Natural frequencies
Optical bistability
Quantum theory
Semiconductor quantum wells
Ultrafast phenomena
Hopf bifurcation
Nonlinear quantum mechanical system
Nonlinear terahertz property
Period-doubling bifurcation
Quantum well heterostructure
Semiconductor Bloch equation
Time-averaged equation
Heterojunctions
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_1077260X_v8_n3_p464_Batista
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:In this letter, we study the effect of many body interactions on the collective response of confined electrons in doped quantum-well (QW) heterostructures to intense far-infrared radiation. Absorption lineshapes are computed both by numerically integrating the equations of motion and by using the appropriately time-averaged equations. For a two-subband double-QW system optical bistability is observed and its parameter range is given. For an asymmetric triple-QW structure driven at ω ≈ E2 - E0 Hopf bifurcations occur which generate a strong response at a frequency incommensurate with the drive frequency or any natural frequency of the system.

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