Berlin 2014 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 6: Femtosecond Spectroscopy 1
MO 6.2: Vortrag
Dienstag, 18. März 2014, 11:00–11:15, BEBEL HS213
A comparative study on chirped-pulse upconversion and direct multichannel MCT detection — •Johannes Knorr, Philipp Rudolf, and Patrick Nuernberger — Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg
We present a comparative study on two spectroscopic techniques employed to detect ultrafast absorption changes in the mid-infrared spectral range, namely direct multichannel detection via HgCdTe (MCT) photodiode arrays and the newly established technique of chirped-pulse upconversion (CPU) [1,2]. Whereas both methods are meanwhile individually used in a routine manner, we directly juxtapose their applicability in femtosecond pump-probe experiments based on 1 kHz shot-to-shot data acquisition [3]. Additionally, different phase-matching conditions in the CPU scheme for a given mid-infrared spectrum are examined, thereby simultaneously detecting signals which are separated by more than 200 cm−1.
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