By Gabriela Slavcheva, Philippe Roussignol
The unheard of keep an eye on of coherence that may be exercised in quantum optics of atoms and molecules has inspired expanding efforts in extending it to solid-state platforms. One motivation to take advantage of the coherent phenomena comes from the emergence of the quantum details paradigm, despite the fact that many extra power gadget functions starting from novel lasers to spintronics are all certain up with matters in coherence. The booklet specializes in fresh advances within the optical regulate of coherence in excitonic and polaritonic structures as version structures for the complicated semiconductor dynamics in the direction of the objective of accomplishing quantum coherence keep an eye on in solid-state. precise recognition is given to the optical keep an eye on of spin coherence. those entrance side learn themes are awarded within the type of evaluate articles by way of major scientists.
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The exceptional keep watch over of coherence that may be exercised in quantum optics of atoms and molecules has inspired expanding efforts in extending it to solid-state platforms. One motivation to use the coherent phenomena comes from the emergence of the quantum details paradigm, even if many extra capability gadget purposes starting from novel lasers to spintronics are all certain up with concerns in coherence.
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Additional resources for Optical Generation and Control of Quantum Coherence in Semiconductor Nanostructures
Fig. 7 S-P polaron lifetime versus polaron energy below the Reststrahlen band: experiments (symbols) and calculations (solid lines). The dominant anharmonic channels of polaron disintegration are indicated as a function of the polaron energy. with increasing ∆SP and finally the strength of the anharmonic contributions also decreases with decreasing ∆SP . The important result (see Fig. ) is the very long population relaxation time of the P-like polaron state. This time is considerably longer than the one found in quantum well-based quantum cascade laser (QCL) devices where the relaxation involves scattering between the 2D in-plane continuum of the lasing levels.
We focus here in the intraband transitions in doped QDs. 2 briefly recalls the main aspects of the bound states of dots hosting one electron. 4. 5 presents very recent theoretical and experimental results of pure dephasing for intraband optical transitions involving polaron states in self-organised QDs. 2 Electronic states of self-organized quantum dots Fig. 1 InAs/GaAs quantum dot (schematics) Let us therefore consider a quantum dot. The Ga(In)As/GaAs self-organised dots are known to be flat objects (h/R ≈ 2-3 nm/10nm where h is the dot height and R the basis radius (see Fig.
Skolnick M. S. and Wilson L. R. Long lifetimes of quantum-dot intersublevel transitions in the terahertz range. Nature Materials 8, 803 - 807 (2009). 24. Zibik E. A. et al Intersublevel polaron dephasing in self assembled quantum dots. Phys. B 77, 041307(R) (2008). 25. , Sellin R. , Ouyang D. and Bimberg D. Phys. Rev. Lett. 87, 157401 (2001). 26. Borri P. and Langbein W. Four wave mixing dynamics of excitons in InGaAs self-assembled quantum dots. J. Phys. Condens. Matter 19, 295201 (2007). 24 T.