ZhETF, Vol. 145,
p. 747 (April 2014)
(English translation - JETP,
Vol. 118, No. 4,
available online at www.springer.com
DETUNING-DEPENDENT NARROWING OF MOLLOW TRIPLET LINES OF DRIVEN QUANTUM DOTS
Saiko A.P., Fedaruk R., Markevich S.A.
Received: August 27, 2013
We study the two-time correlation function and the resonance fluorescence spectrum of a semiconductor quantum dot excited by a strong off-resonant laser pulse. The obtained analytic expressions exhibit a specific detuning-dependent damping of Rabi oscillations of the dressed quantum dot as well as a detuning-dependent width of Mollow triplet lines. In the absence of pure dephasing, the central peak of the triplet is broadened upon increasing detuning, but the blue- and red-side peaks are narrowed. We demonstrate that the pure dephasing processes can invert these dependences. A crossover between the regimes of detuning-dependent narrowing and broadening of the side and central peaks is identified. The predicted effects are consistent with recent experimental results and numerical calculations.