Unconventional motional narrowing in the optical spectrum of a semiconductor quantum dot
By A. Berthelot, Ivan Favero, G. Cassabois, Christophe Voisin, C. Delalande, P. Roussignol, R. Ferreira, Jean-Michel Gérard. 2006
181 citations recorded by the source corpus.
Abstract‘Motional narrowing’ refers to the striking phenomenon where the resonance line of a system coupled to a reservoir becomes narrower on increasing the reservoir fluctuation. A textbook example is found in nuclear magnetic resonance, where the fluctuating local magnetic fields created by randomly oriented nuclear spins are averaged when the motion of the nuclei is thermally activated. The existence of a motional-narrowing effect in the optical response of semiconductor quantum dots remains so far unexplored. This effect may be important in this instance because the decoherence dynamics is a central issue for the implementation of quantum information processing based on quantum dots. Here we report on the experimental evidence of motional narrowing in the optical spectrum of a semiconductor quantum dot broadened by the spectral-diffusion phenomenon. Surprisingly, motional narrowing is achieved when decreasing incident power or temperature, in contrast with the standard phenomenology observed for nuclear magnetic resonance.
Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/d7387b25a658025039ddf5ef54509f1486a2ee2f
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Atomic and Molecular Physics, and Optics
In Electrical and Electronic Engineering
Citations in the corpus
- On-demand generation of indistinguishable polarization-entangled photon pairs (2013, background): “e superimposed to the oscillations could be attributed to the slight chirp 22 of the excitation pulse (see supplementary) or by some incoherent contribution. Fed through 0 26 52 a X Autocorrelation g (2) () 0 26 52 XX Time delay (ns) b Figure 2 | Autocorrelation histograms, under resonant excitation”
- Electric-field-induced coherent coupling of the exciton states in a single quantum dot (2010, background): “Both of these factors will vary the decoherence experienced by a single state [21], but have no effect on the magnitude of the coupling.”
- Two-photon interference of the emission from electrically tunable remote quantum dots (2009, background): “It is well known that spectral diffusion of a quantum emitter can result from fluctuations in the electrostatic environment due to the trapping and escape of charge in nearby defects and impuritie”