Hydration dynamics of oriented DNA films investigated by time-domain terahertz spectroscopy (2007)
Kistner, Caroline, André, Alexander, Fischer, Theo, Thoma, Arne, Janke, Christof, Bartels, Albrecht, ...
The B to A conformational transition of highly oriented DNA films due to a hydration change is observed with time-domain terahertz spectroscopy. Wet-spun films of calf thymus and salmon DNA are...
Ultrafast time-domain spectroscopy based on high-speed asynchronous optical sampling (2007)
Bartels, Albrecht, Cerna, Roland, Kistner, Caroline, Thoma, Arne, Hudert, Florian, Janke, Christof, ...
High-speed asynchronous optical sampling (ASOPS) is a novel technique for ultrafast time-domain spectroscopy (TDS). It employs two mode-locked femtosecond oscillators operating at a fixed repetition...
Ehlers, Alexander, Riemann, Iris, Martin, Sven, Le Harzic, Ronan, Bartels, Albrecht, Janke, Christof, ...
Multiphoton tomography of human skin and nanosurgery of human chromosomes have been performed with a I GHz repetition rate laser by the use of the commercially available femtosecond multiphoton laser...
Coherent acoustic phonons in nanostructures investigated by asynchronous optical sampling (2006)
Dekorsy, Thomas, Hudert, Florian, Cerna, Roland, Schaefer, Hanjo, Janke, Christof, Bartels, Albrecht, ...
A new optical pump-probe technique is implemented for the investigation of acoustic phonon dynamics in the GHz to THz frequency range which is based on two asynchronously linked femtosecond lasers....
Bartels, Albrecht, Hudert, Florian, Janke, Christof, Dekorsy, Thomas, Köhler, Klaus
We demonstrate a technique for femtosecond time-resolved optical pump-probe spectroscopy that allows to scan over a nanosecond time delay at a kilohertz scan rate without mechanical delay line. Two...
High-resolution THz spectrometer with kHz scan rates (2006)
Bartels, Albrecht, Thoma, Arne, Janke, Christof, Dekorsy, Thomas, Dreyhaupt, Andre, Winnerl, Stephan, ...
We demonstrate a rapid scanning high-resolution THz spectrometer capable of acquiring THz field transients with 1 ns duration without mechanical delay line. The THz spectrometer is based on two 1-GHz...
Janke, Christof, Först, Michael, Nagel, Michael, Kurz, Heinrich, Bartels, Albrecht
Two femtosecond Ti:sapphire lasers with slightly different repetition rates near 1 GHz are coupled to implement high-speed asynchronous optical sampling. The application of this technique is...
Zugl.: Aachen, Techn. Hochsch., Diss., 2004.
Inversionless amplification of coherent terahertz radiation (2003)
Janke, Christof, Haring Bolivar, Peter, Bartels, Albrecht, Kurz, Heinrich, Künzel, Harald
We experimentally demonstrate inversionless amplification of the emission from electronic transitions in a solid state system inside a cavity. A semiconductor-based terahertz (THz) emitter is exposed...