Nonlinear terahertz properties of n-type quantum-well heterostructures

A. A. BATISTA; P. I. TAMBORENEA; B. BIRNIR; D. S. CITRIN

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2002 vol. 8 p. 464 - 473

1077-260X

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