제 목 Nonlinear transparency window for ultraintense femtosecond laser pulses in the atmosphere

강 사 Prof. Olga G. Kosareva (Lomonosov Moscow State University, Russia)

시 간 2019년 7월 12일 (금요일) 오후 4시

장 소 제1신공학관 301동 920호

Abstract:

We have found the optimum range of driver wavelengths for mid-infrared ultraintense femtosecond pulse undergoing filamentation in atmospheric air. This wavelength range between 3.1 and 3.5 µm forms the nonlinear transparency window identified through the diligent scan of the pulse central wavelength in the range 2.2 ~ 4.7 µm with the best resolution of 5 nm.

Each of 123 wavelengths scanned corresponds to the solution of the full 3D+time pulse propagation and filamentation problem on 7 ~ 19 m path in air. Due to discovered universal asymmetric character of the nonlinearly enhanced linear absorption in the vicinity of atmospheric molecular band the optimum driver wavelength belongs to the long-wavelength side of the band in agreement with our experiment.

Biography:

Education

* 2013, State Doctor of Physics and Math Sciences (the highest scientific qualification in Russia obligatory for Full Professor position with high – ranking universities and research centers). Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia, thesis title “Filamentation of femtosecond laser radiation in transparent media”.

* 01.04.1992 – 01.04.1995 PhD. Faculty of Physics, M.V. Lomonosov Moscow State University, Russia. Thesis on “Propagation of ultrashort laser radiation in gases in the conditions of ionization”, scientific advisor Prof. V.P.Kandidov. Laser physics is a major.

* 01.09.1986 – 01.02.1992 Master degree. Faculty of Physics, M.V. Lomonosov Moscow State University, Russia, Diploma (physicist, teacher) with Honors.

Current Position

01.04.2016 – NOW Full Professor, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia

Previous Positions

* 01.09.2009 – 31.03.2016 Associate Professor, Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow, Russia

* 01.02.2003 – 31.08.2009 Senior Research Scientist, Faculty of Physics and International Laser Center, M.V. Lomonosov Moscow State University, Moscow, Russia

* 01.02.1996 – 31.01.2003 Research Scientist, Faculty of Physics and International Laser Center, M.V. Lomonosov Moscow State University, Moscow, Russia