Coherent phenomena in a semiconductor quantum well system: effects of double dark states

Abstract

We analyze the steady state and transient properties of the polarization and of the electronic population in a triple semiconductor quantum well structure with tunneling induced interference. We first derive the dark states of the system and show that this structure can lead to double dark states. Then, we show that under the dark state conditions the system can exhibit tunneling induced transparency, slow light, transient gain without inversion and coherent population trapping. The dynamics of the polarization and of the electronic population, as well as the total trapped electronic population in the system, are found to be depended on which dark state condition is satisfied.

Absorption and slow light effect of pulsed light in a triple semiconductor quantum well

“…Our study is a natural extension and our model is for a synthesized 4-level electronic system where some theoretical results have been analysed by some researchers. [20,27,28] Based on the technique of quantum coherence in semiconductor quantum well, our theoretical work maybe has a feasibility in the future.…”

“…Recent studies showed that under the interaction of an electromagnetic field, the constructive interference of the emission spectrum, the tunneling induced interference and the optical bistability could be produced in a triple semiconductor quantum well. [20,27,28] To the best of our knowledge, no further theoretical and experimental work has been carried out to investigate the transmission of slow light in such a triple quantum well interacting with a weak probe field, a strong control field and a pump field, which motivates us to study these phenomena of quantum coherence.…”