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Proceedings Paper

Ultrabroadband 2D electronic spectroscopy as a tool for direct visualization of pathways of energy flow
Author(s): Minjung Son; Gabriela S. Schlau-Cohen
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Paper Abstract

Two-dimensional electronic spectroscopy (2DES) has emerged as an incisive tool for mapping out energy relaxation pathways in complex molecular systems by determining correlation maps between the excitation and emission frequencies. Its enhanced spectral as well as temporal resolution offer new insights into coupling and energy transfer between closely-spaced energy states, which are often hidden in a one-dimensional transient spectrum. However, a major drawback of the current 2DES technique is that the spectral window of detection is directly limited to the laser bandwidth used, which leads to an incomplete visualization of the full energy landscape of the system. As a solution to this limitation, we present an ultrabroadband 2DES apparatus utilizing a 8-fs, 185-nm bandwidth supercontinuum that covers the entire visible region. We demonstrate the utility of our setup by measuring the 2D spectra of laser dyes absorbing at different regions of the laser spectrum, and the major light-harvesting complex of spinach.

Paper Details

Date Published: 24 August 2017
PDF: 9 pages
Proc. SPIE 10348, Physical Chemistry of Semiconductor Materials and Interfaces XVI, 1034817 (24 August 2017); doi: 10.1117/12.2273417
Show Author Affiliations
Minjung Son, Massachusetts Institute of Technology (United States)
Gabriela S. Schlau-Cohen, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 10348:
Physical Chemistry of Semiconductor Materials and Interfaces XVI
Hugo A. Bronstein; Felix Deschler, Editor(s)

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