Two-dimensional electronic spectroscopy with double modulation lock-in detection: enhancement of sensitivity and noise resistance

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Two-dimensional electronic spectroscopy with double modulation lock-in detection: enhancement of sensitivity and noise resistance. / Augulis, Ramunas; Zigmantas, Donatas.

In: Optics Express, Vol. 19, No. 14, 2011, p. 13126-13133.

Research output: Contribution to journalArticle

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TY - JOUR

T1 - Two-dimensional electronic spectroscopy with double modulation lock-in detection: enhancement of sensitivity and noise resistance

AU - Augulis, Ramunas

AU - Zigmantas, Donatas

N1 - The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)

PY - 2011

Y1 - 2011

N2 - In many potential applications of two-dimensional (2D) electronic spectroscopy the excitation energies per pulse are strictly limited, while the samples are strongly scattering. We demonstrate a technique, based on double-modulation of incident laser beams with mechanical choppers, which can be implemented in almost any non-collinear four wave mixing scheme including 2D spectroscopy setup. The technique virtually eliminates artifacts or "ghost" signals in 2D spectra, which arise due to scattering and accumulation of long-lived species. To illustrate the advantages of the technique, we show a comparison of porphyrin J-aggregate 2D spectra obtained with different methods following by discussion. (C) 2011 Optical Society of America

AB - In many potential applications of two-dimensional (2D) electronic spectroscopy the excitation energies per pulse are strictly limited, while the samples are strongly scattering. We demonstrate a technique, based on double-modulation of incident laser beams with mechanical choppers, which can be implemented in almost any non-collinear four wave mixing scheme including 2D spectroscopy setup. The technique virtually eliminates artifacts or "ghost" signals in 2D spectra, which arise due to scattering and accumulation of long-lived species. To illustrate the advantages of the technique, we show a comparison of porphyrin J-aggregate 2D spectra obtained with different methods following by discussion. (C) 2011 Optical Society of America

U2 - 10.1364/OE.19.013126

DO - 10.1364/OE.19.013126

M3 - Article

VL - 19

SP - 13126

EP - 13133

JO - Optics Express

T2 - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 14

ER -