Igor Litvinyuk
Assistant Professor
Address:	327 Cardwell Hall
Phone:	(785) 532-1615
E-mail:	ivl@phys.ksu.edu
Group Webpage
Ph.D. Florida State University, 1997
B.S. Moscow Institute of Physics & Technology, 1989

Research Area

Experimental Atomic, Molecular and Optical (AMO) Physics

We use COLd Target Recoil Ion Momentum Spectroscopy (COLTRIMS or "Reaction Microscope") to study interactions of intense femtosecond laser pulses with atoms and molecules. In our experiments we measure momentum vectors of all charged fragments (electrons and ions) in coincidence. We are interested in such aspects of strong field-matter interactions as ionization of atoms and molecules, dynamic alignment of molecules by laser pulses, Coulomb explosion imaging of ultrafast molecular dynamics. For dynamics studies we combine COLTRIMS with pump-probe technique using few-cycle laser pulses. We are also interested in effects of carrier-envelope phase (CEP) of few-cycle pulses on strong-field processes.

Research Support

• Department of Energy

Recent Selected Publications

• "Multi-photon resonant effects in strong-field ionization: origin of the dip in experimental longitudinal momentum distributions," A.S. Alnaser, C.M. Maharjan, P.Q. Wang and I.V. Litvinyuk, J. Phys. B: At. Mol. Opt. Phys. 39, L323 (2006).
• "Momentum-imaging investigations of the dissociation of D2+ and the isomerization of acetylene to vinylidene by intense short laser pulses," A.S. Alnaser, I. Litvinyuk, T. Osipov, B. Ulrich, A. Landers, E. Wells, C.M. Maharjan, P. Ranitivic, I. Bocharova, D. Ray and C.L. Cocke, J. Phys. B: At. Mol. Opt. Phys. 39, S489 (2006).
• "Wavelength dependence of momentum-space images of low-energy electrons generated by short intense laser pulses at high intensities," C.M. Maharjan , A.S. Alnaser, I. Litvinyuk, P. Ranitovic and C.L. Cocke, J. Phys. B: At. Mol. Opt. Phys. 39, 1955 (2006).
• "Shakeup Excitation during Optical Tunnel Ionization," I.V. Litvinyuk, F. Legare, P.W. Dooley, D.M. Villeneuve, P. B. Corkum, J . Zanghellini, A. Pegarkov, C. Fabian, and T. Brabec, Phys. Rev. Lett. 94, 033003 (2005).
• "Imaging the time-dependent structure of a molecule as it undergoes dynamics." F. Légaré, K.F. Lee, I.V. Litvinyuk, P.W. Dooley, A.D. Bandrauk, D.M. Villeneuve, and P. B. Corkum, "Phys. Rev. A 72, 052717 (2005).
• "Resonant excitation during strong-field dissociative ionization", A.S. Alnaser, M. Zamkov, X.M. Tong, C.M. Maharjan, P. Ranitovic, C.L. Cocke, and I.V. Litvinyuk, Phys. Rev. A 72, 041402(R) (2005).
• "Effects of orbital symmetries in dissociative ionization of molecules by few-cycle laser pulses", A.S. Alnaser, C.M. Maharjan, X.M. Tong, B. Ulrich, P. Ranitovic, B. Shan, Z. Chang, C.D. Lin, C.L. Cocke, and I.V. Litvinyuk, Phys. Rev. A 71, 031403(R) (2005).