Abstract
In this chapter, we address the extrinsic dephasing mechanism of spectral diffusion that dominates the decoherence in semiconductor quantum dots at cryogenic temperature.We discuss the limits of random telegraph and Gaussian stochastic noises, and we describe the general effect of motional narrowing in the context of spectral noise. We emphasize the unconventional phenomenology of motional narrowing in standard semiconductor quantum dots at low incident power and temperature, that makes the quantum dot emission line a sensitive probe of the extrinsic reservoir fluctuation dynamics. We further show that the text book phenomenology of motional narrowing in nuclear magnetic resonance is recovered in quantum dots embedded in field-effect heterostructure. In that case, the electrical control of the mesoscopic environment of the quantum dot leads to conventional motional narrowing where the motion consists in carrier tunneling out of the defects around the quantum dot.
Keywords
- Nuclear Magnetic Resonance
- Gate Voltage
- Relaxation Function
- Deep Level Transient Spectroscopy
- Jump Process
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Cassabois, G. (2010). Spectral diffusion dephasing and motional narrowing in single semiconductor quantum dots. In: Slavcheva, G., Roussignol, P. (eds) Optical Generation and Control of Quantum Coherence in Semiconductor Nanostructures. NanoScience and Technology, vol 0. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-12491-4_3
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DOI: https://doi.org/10.1007/978-3-642-12491-4_3
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