Andrius Baltuska

Andrius Baltuska

Andrius Baltuska

The group of Andrius Baltuska works on the development and spectroscopic applications of intense few-cycle pulse coherent light sources in the optical frequency range (0.5 – 9 µm) and in the extreme ultraviolet to X-ray ranges (0.7 – 12 nm). A particular emphasis is on intense few-cycle pulse generation in the IR and MID-IR regions which target a variety of emerging strong field applications. Another major technological interest is tabletop sources of secondary coherent laser-like radiation based on strong-field effects and suitable for the study of ultrafast dynamics and imaging of materials in the THz and soft-X-ray ranges. Via a record-breaking extreme nonlinear frequency conversion that reaches the 5031st harmonic order, the group of Prof. Baltuska succeeded in generating XUV—X-ray continua up to a phase matching cutoff frequency of 1.6 keV (λ < 0.8 nm), thus covering both the X-ray water window and the region of L-edges of magnetic materials. Aside from advancing few-cycle photonic sources, the group studies attosecond and femtosecond dynamics in condensed phase.

Recently, it pioneered an optical pump-probe technique to trace attosecond ionization dynamics in transparent bulk solids, capable of discriminating between the multiphoton and tunneling types of ionization.

Link to Prof. Baltuska's group