Zentrum für Optische Technologien (ZOT)

Group picture ZOT AG Harth Oct 2023

The group consists of students and employees of the Aalen University (HS-Aalen), the ZOT.

• Group leader: Prof. Anne Harth
• PhD studends: Murat-Jakub Ilhan, Regina Schuster, Max Steudel (Zeiss)
• Master students: Cornelia Bauer, Julian Jakob
• Bachelor students: Steven Eckstein, Aaron Vornhagen
  
• Project students: Marius Foith (BA), Tanja Klar (MA), Valentin Schäfer (MA)
• Research Associate: Michael Wagner

Funding: DFG: QUTIF - SPP-1840:411044455, MPIK

Dynamics in the Attosecond Range:

Direct observation of ultrafast electron motion in atomic or molecular systems is an aspect of fundamental physics and is enabled by the generation of attosecond pulses in the XUV spectral region. A major advantage of attosecond pulse trains over isolated attosecond pulses is their high spectral resolution while maintaining high temporal resolution. The goal is to study photoionization in atoms and molecules with attosecond pulse trains. Of particular interest are the continuum-continuum transitions near the ionization threshold.

Here you find a short lab tour showing our experimental setup in Heidelberg:
Multi-Sideband-RABBITT: Video (German) 

Publications:

H. Srinivas et al., "High-repetition rate attosecond beamline for multi-particle coincidence experiments," Optics Express 30 (2022) 13646

D. Bharti et al., "Decomposition of the transition phase in multi-sideband schemes for reconstruction of attosecond beating by interference of two-photon transitions," Phys. Rev. A 103 (2021) 022834

A. Harth et al., "Extracting phase information on continuum-continuum couplings," Phys. Rev. A 99 (2019) 023410

AG_Harth_publ

F. Shobeiry et al. "Sub-femtosecond dynamics in photoionization and photodissociation processes," Proc. SPIE 12411, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIII, 1241107 (2023) 

D. Bharti et al., "Multisideband interference structures observed via high-order photon-induced continuum-continuum transitions in argon," Physical Review A 107 (2), 022801 (2023)

H. Srinivas et al., "High-repetition rate attosecond beamline for multi-particle coincidence experiments," Optics Express 30 (2022) 13646

D. Bharti et al., "Decomposition of the transition phase in multi-sideband schemes for reconstruction of attosecond beating by interference of two-photon transitions," Physical Review A 103 (2), 022834 (2021)

F. Shobeiry et al., "Sub-femtosecond optical control of entangled states," arXiv preprint arXiv:2110.06668 (2021)

M. Turconi et al, "Spin–orbit-resolved spectral phase measurements around a Fano resonance," Journal of Physics B: Atomic, Molecular and Optical Physics 53 (18), 184003 (2020)

Y-C. Cheng et al., "Controlling photoionization using attosecond time-slit interferences," Proceedings of the National Academy of Sciences 117 (20), 10727-10732 (2020)

S. Hu et al., "Noise effects and the impact of detector responses on the characterization of extreme ultraviolet attosecond pulses," Applied Optics 59 (7), 2121-2127 (2020)

A. Harth et al.,"Extracting phase information on continuum-continuum couplings," Physical Review A 99 (2), 023410 (2019)

Y-C. Cheng et al., "Controlling the Photoelectric Effect in the Time Domain," arXiv preprint arXiv:1908.09508 (2019)

M. Isinger et al., "Photoionization in the time and frequency domain," Science 358 (6365), 893-896 (2017)

D. Busto et al., "Time-frequency representations of autoionization dynamics in helium," arXiv preprint arXiv:1709.07639 (2017)

C. Guo and A. Harth et al., "Phase control of attosecond pulses in a train," Journal of Physics B: Atomic, Molecular and Optical Physics (2017)

A. Harth and C. Guo et al., "Compact 200 kHz HHG source driven by a few-cycle OPCPA," Journal of Optics (2017)

M. Miranda et al., "Fast iterative retrieval algorithm for ultrashort pulse characterization using dispersion scans," JOSA B 34 (1), 190-197 (2017)

M. Miranda et al., "Spatiotemporal characterization of ultrashort optical vortex pulses," Journal of Modern Optics 64 (sup4), S1-S6 (2017)

P. Rudawski and A. Harth et al., "Carrier-envelope phase dependent high-order harmonic generation with a high-repetition rate OPCPA-system," EUROPEAN PHYSICAL JOURNAL D 69, 70 (2015)

E. Lorek et al., "Size and shape dependent few-cycle near-field dynamics of bowtie nanoantennas," Optics Express 23 31460-31471 (2015)

E. Marsell et al., "Direct subwavelength imaging and control of near-field localization in individual silver nanocubes," APPLIED PHYSICS LETTERS 107 201111 (2015)

E. Marsell et al., "Nanoscale Imaging of Local Few-Femtosecond Near-Field Dynamics within a Single Plasmonic Nanoantenna," NANO LETTERS 15 6601-6608 (2015)

M. Miranda et al., "Spatiotemporal characterization of ultrashort laser pulses using spatially resolved Fourier transform spectrometry," Optics Letters 39, 5142-5145 (2014)

J. Matyschok et al. "Temporal and spatial effects inside a compact and CEP stabilized, few-cycle OPCPA system at high repetition rates," Optics Express 21, 29656-29665 (2013)

T. Lang et al., "Impact of temporal, spatial and cascaded effects on the pulse formation in ultra-broadband parametric amplifiers," Optics Express 21, 949-959 (2013)

A. Harth et al., "Two-color pumped OPCPA system emitting spectra spanning 1.5 octaves from VIS to NIR," Optics Express 20, 3076-3081 (2012)

T. Lang et al., "High power ultra-widely tuneable femtosecond pulses from a non-collinear optical parametric oscillator (NOPO)," Optics Express 20, 912-917 (2012)

S. Rausch et al., "Few-cycle oscillator pulse train with constant carrier-envelope-phase and 65 as jitter," Optics Express 17, 20282-20292 (2009)

S. Rausch et al., "Few-cycle femtosecond field synthesizer," Optics Express 16, 17410-17419 (2008)

S. Rausch et al., "Controlled waveforms on the single-cycle scale from a femtosecond oscillator," Optics Express 16, 9739-9745 (2008)

Open positions and student research projects of this working group and the ZOT can be found  here.