Implementation of a setup for broadband femtosecond transient absorption with kHz acquisition rate


Tesis (Bachelor), 2013

64 Páginas, Calificación: 1,1


Resumen o Introducción

It is the intention of this thesis to firstly present a theoretical modelling of how 400-nm pump pulses can be generated from a 800-nm fundamental, yielding the shortest possible pulses at a high conversion efficiency. Secondly, I describe how three different types of optical autocorrelation and the information about the pulse spectra and durations they incorporate can be used to characterise our present pulse amplification system. Thirdly, I will present a newly-implemented transient absorption setup which has been distinguished with respect to its noise sensitivity and to the chirp the probe beam accumulates after the supercontinuum generation process. Finally, I will discuss the transient absorption signature of a biomimetic photoswitch (dMe-MeO-NAIP) recorded with the new setup.

Since its beginnings in the late 1980s, ultrafast laser spectroscopy and, in particular, transient absorption has become a standard experimental method. It allows to investigate the photochemical properties of molecules with a temporal resolution down to the femtosecond timescale. However, major challenges for the implementation of a transient absorption setup continue to be the maintenance of pulse durations as short as possible and, on the other hand, noise prevention.

Detalles

Título
Implementation of a setup for broadband femtosecond transient absorption with kHz acquisition rate
Universidad
Free University of Berlin  (Fakultät für Physik)
Calificación
1,1
Autor
Año
2013
Páginas
64
No. de catálogo
V491806
ISBN (Ebook)
9783668983991
ISBN (Libro)
9783668984004
Idioma
Inglés
Palabras clave
Transient Absorption, Femtosecond Spectroscopy, Quantum Chemistry, Ultafast Optics
Citar trabajo
Maximilian Sohmen (Autor), 2013, Implementation of a setup for broadband femtosecond transient absorption with kHz acquisition rate, Múnich, GRIN Verlag, https://www.grin.com/document/491806

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