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Fifth-order two-quantum absorptive two-dimensional electronic spectroscopy of CdSe quantum dots.

Authors :
Brosseau, Patrick
Palato, Samuel
Seiler, Hélène
Baker, Harry
Kambhampati, Patanjali
Source :
Journal of Chemical Physics; 12/21/2020, Vol. 153 Issue 23, p1-14, 14p
Publication Year :
2020

Abstract

Two-quantum variants of two-dimensional electronic spectroscopy (2DES) have previously been used to characterize multi-exciton interactions in molecules and semiconductor nanostructures though many implementations are limited by phasing procedures or non-resonant signals. We implement 2DES using phase-cycling to simultaneously measure one-quantum and two-quantum spectra in colloidal CdSe quantum dots. In the pump–probe geometry, fully absorptive spectra are automatically acquired by measuring the sum of the rephasing and nonrephasing signals. Fifth-order two-quantum spectroscopy allows for direct access to multi-exciton states that may be obscured in excited state absorption signals due to population relaxation or third-order two-quantum spectra due to the non-resonant response. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00219606
Volume :
153
Issue :
23
Database :
Complementary Index
Journal :
Journal of Chemical Physics
Publication Type :
Academic Journal
Accession number :
147728431
Full Text :
https://doi.org/10.1063/5.0021381