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Proceedings Paper

Unraveling electron and hole relaxation dynamics in colloidal CdTe nanorods: a two-dimensional electronic spectroscopy study
Author(s): Tatjana Stoll; Federico Branchi; Julien Rehault; Ilka Kriegel; Francesco Scotognella; Francesco Tassone; Giulio Cerullo
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Paper 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.

Paper Details

Date Published: 23 February 2017
PDF: 9 pages
Proc. SPIE 10102, Ultrafast Phenomena and Nanophotonics XXI, 1010213 (23 February 2017); doi: 10.1117/12.2252329
Show Author Affiliations
Tatjana Stoll, Politecnico di Milano, IFN, CNR (Italy)
Federico Branchi, Politecnico di Milano, IFN, CNR (Italy)
Julien Rehault, Politecnico di Milano, IFN, CNR (Italy)
Ilka Kriegel, Istituto Italiano di Tecnologia (Italy)
Francesco Scotognella, Politecnico di Milano, IFN, CNR (Italy)
Francesco Tassone, Istituto Italiano di Tecnologia (Italy)
Giulio Cerullo, Politecnico di Milano, IFN, CNR (Italy)

Published in SPIE Proceedings Vol. 10102:
Ultrafast Phenomena and Nanophotonics XXI
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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