Determination of the exciton-free carrier coupling constant in semiconductors

An, Nguyen Ba; Tuong, Le Thi Cat

doi:10.1016/0038-1098(91)90054-y

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Excitonic bistabilities, instabilities and chaos in laser-pumped semiconductors

An¹,

Dan

Nguyen³

1994

Phys. Scr.

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The Hurwitz criteria are used for a stability analysis of the steady state excitonic optical bistability curves in a semiconductor pumped by an external laser resonant with the exciton level. Besides the middle branch of the bistability curves which is unstable in the sense of the linear stability theory, we have found other domains of instability in the upper and lower branches of the steady state curves. Numerical results show that a possible route to chaos in the photon-exciton system is period-doubling self-oscillation process. The influence of the presence of free carriers that coexist with the excitons is also discussed.

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