Phd in Photonics, High Harmonic Generation
vor 4 Stunden
PhD position openings at the Ultrafast Laser Group
Prof. A. Baltuska - Photonics Institute - TU Wien
In this technique laser pulses from an Yb amplifier are propagated in a long gas-filled hollow core fiber to obtain energetic 20fs-pulses with several mJ of energy, spectrally redshifted to a bandwidth of 1200nm-1300nm. Extension of the bandwidth to ~1500nm seems possible.
These energetic, short and frequency-tunable laser pulses will be applied for the following project, for which 1 Ph.D. position and Master thesis are currently available:
Project: direct driving of High Harmonic Generation (HHG) in the water window.
HHG is a consolidated technique which has proven to be very valuable for time-resolved investigations in atoms and molecules in the extreme ultraviolet and soft X-ray spectral region. The main issues are the limit in photon flux and the maximum photon energy (cut-off) which can be reached. The cut-off can be extended by driving HHG with longer wavelengths (thus scaling as λ²), but at the cost of the overall efficiency (which drastically drops as λ-5 - λ-6). Also, the energy losses for the frequency conversion must be taken into account (so far, this was achieved by OPA with typical efficiencies of ~10%). The energy-efficient generation of short mid-IR pulses offers the possibility to generate harmonics with extended cut-off and unprecedented photon flux. The project is focused on laser and X-ray source development, and later on time-resolved investigations of ultrafast dynamics in atoms and molecules by means of soft X-ray - IR pump-probe experiments by monitoring absorption spectra and scattering patterns.
**Benefits**:
- Competitive salary (std. Austrian Ph.D. salary ~1600€ net x 14 times a year)
- Continuing personal and professional education
- Central location with very good accessibility in a city regularly ranked first worldwide for life quality
Eligibility criteria
A master degree in Physics or Electrical Engineering or equivalent is required.
Selection process
Additional comments
Offer Requirements
**REQUIRED EDUCATION LEVEL**
Physics: Master Degree or equivalent
**REQUIRED LANGUAGES**
ENGLISH: Good
Skills/Qualifications
- Master degree in physics or electrical engineering (or an equivalent degree) with high marks
- Background and interest in optics and photonics
- Strong attitude towards experimental research
- Ability to work in a team
- Problem solving skills
- Fluent in written and spoken English
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