Ultrabroadband 2D electronic spectroscopy as a tool for direct visualization of pathways of energy flow

Minjung Son; Gabriela S. Schlau-Cohen

doi:10.1117/12.2273417

24 August 2017 Ultrabroadband 2D electronic spectroscopy as a tool for direct visualization of pathways of energy flow

Minjung Son, Gabriela S. Schlau-Cohen

Proceedings Volume 10348, Physical Chemistry of Semiconductor Materials and Interfaces XVI; 1034817 (2017) https://doi.org/10.1117/12.2273417
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States

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.

Citation Download Citation

Minjung Son and Gabriela S. Schlau-Cohen "Ultrabroadband 2D electronic spectroscopy as a tool for direct visualization of pathways of energy flow", Proc. SPIE 10348, Physical Chemistry of Semiconductor Materials and Interfaces XVI, 1034817 (24 August 2017); https://doi.org/10.1117/12.2273417

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