The research pursued by the Ultrafast Laser Group of Photonics Institute, led by Andrius Baltuška, focuses on the generation of ultrashort intense laser pulses in the near- and mid-infrared wavelength range and applications of these pulses to frequency conversion into the THz (1012 Hertz) and extreme ultraviolet/X-ray ranges.
The successful candidate will experimentally work on the generation of THz bursts and their application to spectroscopy on molecules and molecular compounds. These THz bursts consist of several (up to 15) THz pulses delayed to each other by only a few picoseconds (10-12 seconds) and are generated by frequency down-conversion (optical rectification) of bursts of ultrashort, intense laser pulses with an identical number of pulses and pulse delay. A laser system that is capable of producing such bursts of laser pulses has been demonstrated recently by the Baltuska group, see Ref. [1].
The goal of the PhD project is to apply a laser system based on this technology to the generation of THz bursts, to characterize the properties of the THz bursts and, subsequently, to build an experimental setup that allows to perform linear spectroscopic measurements on molecules and molecular compounds with these THz bursts. In the long run this approach shall be extended to non-linear spectroscopy.
Further information about the institute and ongoing research projects can be found on the webpages of the institute http://www.photonik.tuwien.ac.at/ and the research group http://atto.photonik.tuwien.ac.at .
[1] V. Stummer et al., "Programmable generation of terahertz bursts in chirped-pulse laser amplification," Optica 7, 1758 (2020); [http://dx.doi.org/10.1364/OPTICA.403184 ].
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