Regensburg 2016 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 48: Posters - Bioimaging and Spectroscopy

BP 48.9: Poster

Mittwoch, 9. März 2016, 17:00–19:00, Poster C

Experimental Setup for THz-Time-Domain-Spectroscopy on Complex Biological Samples — •Lisa Schneiderwind, Andreas Garz, Heiko Lokstein, and Maria Krikunova — Institut for Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin

The goal of this project is a free space setup for THz time-domain spectroscopy (THz-TDS) on samples containing water and biomolecules, for example molecules involved in the processes of photosynthesis. The generation and detection of the THz radiation to investigate such molecules is based on a photo-conductive antennae equipped with a focusing aspheric silicon lens. In this setup a femtosecond fiber laser is used to pump the antennae. With this configuration, it is possible to perform THz-TDS experiments by either measuring the amplitude of the THz-field at a fixed time-delay or fully characterizing the THz-field at all time delays. The setup can be further extended by replacing the detection antenna by electro-optical sampling. To produce THz radiation with higher field strength the generation antenna can also be replaced by non-linear crystals. The setup allows to perform time-resolved experiments to investigate the behavior of complex molecules after excitation.