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Department of Physics

Cosmin Blaga

Cosmin BlagaAssistant Professor
332 Cardwell Hall
blaga@phys.ksu.edu
Group Webpage

Ph.D. Stony Brook University, 2009
M.Sc. Babes-Bolyai University, 2001

Research Area

Experimental Atomic, Molecular and Optical Physics; Ultrafast Laser Technologies

The overarching goal of our efforts is to understand the interaction of matter with intense, ultrafast laser pulses and to develop applications and novel technologies based on the newfound science. We employ a three-pillar comprehensive strategy consisting in (i) development of novel ultrafast laser technologies that enable us to (ii) address and understand the fundamental scientific processes at play to (iii) design practical applications. In recent years, using parametric and chirped pulse amplification techniques the group has been pursuing the development of intense, tunable, few-cycle lasers operating at midinfrared wavelengths. Such lasers allow us to investigate the transition from multiphoton to strong field (tunneling) ionization of atoms and molecules, the role of vibrational resonances in strong field physics, laser-induced electron diffraction, photoelectron wave packet dynamics including the role of Coulomb focusing and laser-induced dipoles, highly nonsequential ionization and electron-electron correlations. We are also pursuing high-harmonic generation in solid media as a condensed-phase ultrafast spectroscopic tool and as a compact, extreme ultraviolet coherent source operating at wavelengths beyond the reach of conventional nonlinear crystals.

Research Support

  • Department of Energy
  • Kansas State University

Graduate Advisees

  • Pavan Muddukrishna
  • Eric Mullins

Recent Selected Publications

Su-Ju Wang, Jiří Daněk, Cosmin I. Blaga, Louis F. DiMauro, Jens Biegert, and   C. D. Lin (2021). Two-dimensional retrieval methods for ultrafast imaging of molecular structure using laser-induced electron diffraction.  J. Chem. Phys. 155, 164104.  [link]

Daniel C Haynes, Markus Wurzer, Albert Schletter, A Al-Haddad, C Blaga, C Bostedt, J Bozek, H Bromberger, M Bucher, A Camper, S Carron, R Coffee, JT Costello, LF DiMauro, Y Ding, K Ferguson, I Grguraš, W Helml, MC Hoffmann, M Ilchen, S Jalas, NM Kabachnik, AK Kazansky, R Kienberger, AR Maier, T Maxwell, T Mazza, M Meyer, H Park, J Robinson, C Roedig, H Schlarb, R Singla, F Tellkamp, PA Walker, K Zhang, G Doumy, C Behrens, AL Cavalieri (2021).  Clocking auger electrons.  Nature Physics volume 17, 512–518.  [link]

Vyacheslav E Leshchenko, Bradford K Talbert, Yu Hang Lai, Sha Li, Yaguo Tang, Stephen J Hageman, Greg Smith, Pierre Agostini, Louis F DiMauro, Cosmin I Blaga (2021). High-power few-cycle Cr: ZnSe mid-infrared source for attosecond soft x-ray physics. Optica 7, 981-988. [link

Yu Hang Lai, Xu Wang, Yingbin Li, Xiaowei Gong, Bradford K Talbert, Cosmin I Blaga, Pierre Agostini, Louis F DiMauro (2020). Experimental test of recollision effects in double ionization of magnesium by near-infrared circularly polarized fields. Phys. Rev. A 101, 013405. [link]

Harald Fuest, Yu Hang Lai, Cosmin I. Blaga, Kazuma Suzuki, Junliang Xu, Philipp Rupp, Hui Li, Pawel Wnuk, Pierre Agostini, Kaoru Yamazaki, Manabu Kanno, Hirohiko Kono, Matthias F. Kling, and Louis F. DiMauro (2019). Diffractive Imaging of C60 Structural Deformations Induced by Intense Femtosecond Midinfrared Laser Fields. Phys. Rev. Lett. 122, 053002. [link]