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Título:	Dressed excitonic states and quantum interference in a three-level quantum dot ladder system
Autor:	Gerardot, B. D.; Warburton, Richard J.
Fecha de publicación:	20-ene-2009
Editor:	Institute of Physics Publishing
Citación:	New Journal of Physics 11: 013028 (2009)
Resumen:	We observe dressed states and quantum interference effects in a strongly driven three-level quantum dot ladder system. The effect of a strong coupling ﬁeld on one dipole transition is measured by a weak probe ﬁeld on the second dipole transition using differential reﬂection. When the coupling energy is much larger than both the homogeneous and inhomogeneous linewidths an Autler–Townes splitting is observed. Signiﬁcant differences are observed when the transitions resonant with the strong and weak ﬁelds are swapped, particularly when the coupling energy is nearly equal to the measured linewidth. This result is attributed to quantum interference: destructive or constructive interference with modest visibility is observed depending on the pump/probe geometry. The data demonstrate that coherence of both the bi-exciton and the exciton is maintained in this solid-state system, even under intense illumination, which is crucial for prospects in quantum information processing and nonlinear optical devices.
Descripción:	B. D. Gerardot...et al.
Versión del editor:	http://dx.doi.org/10.1088/1367-2630/11/1/013028
URI:	http://hdl.handle.net/10261/46499
DOI:	10.1088/1367-2630/11/1/01302
ISSN:	1367-2630
Aparece en las colecciones:	(IFISC) Artículos