Phase and Spin Relaxation Dynamics in High-Quality Single GaN/AlGaN Quantum Well
We report on the first time measurement, using four-wave mixing, of the dephasing time of excitons in a high-quality GaN/Al0.05Ga0.95N quantum well. The comparison with the exciton-spin lifetime, determined via pump-probe spectroscopy using polarized laser pulses, shows that spin relaxation occurs in the motional narrowing regime.
KeywordsSpin Relaxation Large Exciton Binding Energy Exciton Density Dephasing Rate AlGaN Barrier
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