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Article

Ultraviolet Transient Absorption Spectrometer with Sub-20-fs Time Resolution

IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
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Appl. Sci. 2018, 8(6), 989; https://doi.org/10.3390/app8060989
Received: 11 May 2018 / Revised: 8 June 2018 / Accepted: 13 June 2018 / Published: 16 June 2018
We describe a transient absorption (TA) spectroscopy system in the ultraviolet (UV) spectral range, for the study of the ultrafast optical response of biomolecules. After reviewing the techniques for the generation and characterization of ultrashort UV pulses, we describe the experimental setup of our ultrabroadband UV TA spectrometer. The setup combines sub-20-fs UV pump pulses tunable between 3.35 and 4.7 eV, with broadband white-light-continuum probe pulses in the 1.7–4.6 eV range. Thanks to the broad tunability of the pump pulses in the UV spectral range, the extremely high temporal resolution and the broad spectral coverage of the probe, this TA system is a powerful and versatile tool for the study of many biomolecules. As an example of its potential, we apply the TA spectrometer to track ultrafast internal conversion processes in pyrene after excitation in the UV, and to resolve an impulsively excited molecular vibration with 85-fs period. View Full-Text
Keywords: ultrafast spectroscopy; transient absorption; femtosecond pulses; ultraviolet; photophysics; photochemistry ultrafast spectroscopy; transient absorption; femtosecond pulses; ultraviolet; photophysics; photochemistry
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MDPI and ACS Style

Borrego-Varillas, R.; Ganzer, L.; Cerullo, G.; Manzoni, C. Ultraviolet Transient Absorption Spectrometer with Sub-20-fs Time Resolution. Appl. Sci. 2018, 8, 989. https://doi.org/10.3390/app8060989

AMA Style

Borrego-Varillas R, Ganzer L, Cerullo G, Manzoni C. Ultraviolet Transient Absorption Spectrometer with Sub-20-fs Time Resolution. Applied Sciences. 2018; 8(6):989. https://doi.org/10.3390/app8060989

Chicago/Turabian Style

Borrego-Varillas, Rocío; Ganzer, Lucia; Cerullo, Giulio; Manzoni, Cristian. 2018. "Ultraviolet Transient Absorption Spectrometer with Sub-20-fs Time Resolution" Appl. Sci. 8, no. 6: 989. https://doi.org/10.3390/app8060989

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