Main Scientific Accomplishments
As Research Group Leader (01/2020 –), MPI-FKF Stuttgart, Germany
Demonstrated that spatial and temporal motion of valence electrons in molecules can be captured simultaneously with temporal and spatial resolution of 200 attosecond and picometer, respectively. This work has broken the established space-time limits by several orders of magnitude and has opened a completely new window to understand the dynamics unfolding during transformations (bond breaking/formation) in molecules at the quantum limits. These transformations are of immense fundamental interests to physicists and chemists.
M. Garg, A. Martin-Jimenez, M. Pisarra, Y. Luo, F. Martín, and K. Kern. Real-space subfemtosecond imaging of quantum electronic coherences in molecules. Nature Photonics (2021). Web Link
As Post-Doctoral Researcher (02/2018 – 01/2020), MPI-FKF Stuttgart, Germany
Built a quantum microscope with the capability to capture electronic motion simultaneously in real-space (picometers) and real-time (200 attoseconds); a four-dimensional quantum microscope. First demonstration of laser-induced coherent control of electrons in scanning tunneling microscopy on attosecond timescales.
M. Garg, and K. Kern. Science 367 (6476), 411-415 (2020). Web Link
(02/2017 – 01/2018), MPQ Garching, Germany
First experimental realization of extreme ultraviolet pulses with excellent reproducibility till date from one laser shot to the other. Most attosecond experiments suffer from fluctuation (intensity/phase) of the extreme ultraviolet pulses. This work opened an alternative approach wherein the fluctuations in the extreme ultraviolet pulses is almost negligible.
M.Garg, H.Y. Kim, and E. Goulilelmakis, Nature Photonics, 12, 291-296 (2018). Web Link
As Doctoral Student (10/2012 – 01/2017), MPQ Garching, Germany
First demonstration of generation and measurement of multi Peta-Hertz (1015 Hz) phase coherent electric currents in solids. This work is a major milestone in scientists’ endeavor to light-wave-electronics, which will operate at a frequency of 1015 Hz, nearly a million times faster than the conventional electronics (GHz, 109 Hz).
M. Garg, M. Zhan, T. T. Luu, H. Lakhotia, T. Klostermann, A. Guggenmos, and E.Goulielmakis, Nature 359-363, 538 (2016). Web Link
Demonstrated a new novel high-harmonic spectroscopy technique to investigate bandstrcuture of wide bandgap dielectric materials. Photoemission spectroscopies suffer from electrostatic charging while trying to capture the bandstructure of wide bandgap dielectric materials. The new novel high-harmonic spectroscopic technique bypasses this problem.
T. T. Luu*, M. Garg* , S. Y. Kruchinin, A. Moulet, M. T. Hassan, and E. Goulielmakis. Nature 498-502, 521 (2015). Web Link
* Authors with equal contribution.
As Graduate Student (08/2007 – 06/2012), IISER-Kolkata, India
Performed first time-dependent potential energy surface calculation for a molecule in presence of an ultrashort intense laser pulse. Interaction of intense laser pulses with a molecule changes the energy landscape of molecule, which cannot be described in the framework of the Born-Oppenheimer approximation. This work was the first realization of calculation of time-varying energy landscape in a molecule beyond the Born-Oppenheimer approximation.
M.Garg, D. Mathur, and A. Tiwari J. Phys. Chem., 8762-8767, 116 (2012). Web Link