Temperature-dependent Rabi rotation in semiconductor quantum dots

2010 
The dynamics of exciton coupling to photons and LO-phonons in a three-level quantum-dot system is studied using the Wigner–Weisskopf approach. An analytical solution to the system for a rectangular driving pulse is derived, and the wave function of an exciton is found to form a unit vector directed to the surface of an S2 Bloch hemisphere. For long decoherence times, the vector traces out a temperature (T)-dependent Rabi circle with increase pulse area. An increase in T does not deform the Rabi circle but shrinks its radius. Accordingly, a diverse representational scheme is proposed. These properties expand scenarios to T-dependent regimes.
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