23 February 2017 Unraveling electron and hole relaxation dynamics in colloidal CdTe nanorods: a two-dimensional electronic spectroscopy study
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Abstract
In this work we study the ultrafast exciton dynamics in CdTe nanorods by using two-dimensional electronic spectroscopy (2DES). By simultaneously exciting the lowest three excitonic transitions (i.e. S1, S2 and S3) we extract the electron and hole relaxation pathways, owing to the combined temporal and spectral resolution of 2DES. In particular, we directly observe hot hole relaxation from the second to the first exciton state in about 30 fs by excitation of the S2 transition. Additionally, we extract a direct charge relaxation to S1 by disentangling the overlapping bleach and excited state induced energy level shifts after excitation of S3.
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Tatjana Stoll, Tatjana Stoll, Federico Branchi, Federico Branchi, Julien Rehault, Julien Rehault, Ilka Kriegel, Ilka Kriegel, Francesco Scotognella, Francesco Scotognella, Francesco Tassone, Francesco Tassone, Giulio Cerullo, Giulio Cerullo, } "Unraveling electron and hole relaxation dynamics in colloidal CdTe nanorods: a two-dimensional electronic spectroscopy study", Proc. SPIE 10102, Ultrafast Phenomena and Nanophotonics XXI, 1010213 (23 February 2017); doi: 10.1117/12.2252329; https://doi.org/10.1117/12.2252329
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