Ultrafast sublattice pseudospin relaxation in graphene probed by polarization-resolved photoluminescence

Article

关键词: SPINTRONICS;    SCATTERING;    SPIN;    REFLECTION;    DYNAMICS;    CARRIERS;   

DOI  :  10.1103/PhysRevB.95.241412

来源: SCIE

【 摘 要 】

Electronic pseudospin degrees of freedom in two-dimensional materials exhibit unique carrier-field interactions which allow for advanced control strategies. Here, we investigate ultrafast sublattice pseudospin relaxation in graphene by means of polarization-resolved photoluminescence spectroscopy. A comparison with microscopic Boltzmann simulations allows us to determine a lifetime of the optically aligned pseudospin distribution of 12 +/- 2 fs. This experimental approach extends the toolbox of graphene pseudospintronics, providing additional means to investigate pseudospin dynamics in active devices or under external fields.

【 授权许可】

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