Controlled storage and transfer of photonic space-time quantum-coherence in active quantum dot nanomaterials.
We demonstrate the potential of semiconductor quantum dot nanomaterials for solid-state based controllable quantum memories in which losses may be compensated by gain. The dynamic photonic quantum-coherence present in a quantum dot ensemble and generated by a coherent signal pulse is influenced and controlled by disorder, spectral detuning and the power of the pulse. We show that the high coupling of spatial and temporal degrees of freedom is a key requirement for coherence transfer and/or storage.
Advanced Technology Institute and Department of Physics, Faculty of Engineering andPhysical Sciences, University of Surrey, Guildford, Surrey, UK. e.gehrig@surrey.ac.uk
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D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008962:Models, Theoretical; D049329:Nanostructures / Q000737:chemistry*; D017785:Photons; D045663:Quantum Dots; D012542:Scattering, Radiation; D012666:Semiconductors; D041623:Tomography, Optical Coherence / Q000295:instrumentation*