Agradecimentos: This work was supported by the Department of Energy grant number DE-SC0015782. D.B.A. acknowledges support by a fellowship from the Brazilian National Council for Scientific and Technological Development (CNPq). L.A.P. acknowledges support from the FAPESP (project numbers...

Agradecimentos: This work was supported by the Department of Energy grant number DE-SC0015782. D.B.A. acknowledges support by a fellowship from the Brazilian National Council for Scientific and Technological Development (CNPq). L.A.P. acknowledges support from the FAPESP (project numbers 2013/16911-2 and 2016/50011-7)

Abstract: Coupling to phonon modes is a primary mechanism of excitonic dephasing and energy loss in semiconductors. However, low-energy phonons in colloidal quantum dots and their coupling to excitons are poorly understood because their experimental signatures are weak and usually obscured by the...

Abstract: Coupling to phonon modes is a primary mechanism of excitonic dephasing and energy loss in semiconductors. However, low-energy phonons in colloidal quantum dots and their coupling to excitons are poorly understood because their experimental signatures are weak and usually obscured by the unavoidable inhomogeneous broadening of colloidal dot ensembles. We use multidimensional coherent spectroscopy at cryogenic temperatures to extract the homogeneous nonlinear optical response of excitons in a CdSe/CdZnS core/shell colloidal quantum dot ensemble. A comparison to the simulation provides evidence that the observed lineshapes arise from the coexistence of confined and delocalized vibrational modes, both of which couple strongly to excitons in CdSe/CdZnS colloidal quantum dots

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2013/16911-2; 2016/50011-7

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

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