Sai Ramakrishna

Research Assistant Professor
Ph.D., Indian Institute of Science, 1995

Dr. Ramakrishna is currently interested in the theoretical description and understanding of photoinduced ultrafast processes  in a broad range of molecular systems  (a) in the condensed phase, such as  high-order harmonic, birefringence and photoelectron signals from aligned molecules, (b) at molecule-substrate interfaces such as charge injection  in dye-sensitized solar cells.  Ultrafast photoinduced carrier dynamics in  quantum dots attached to  semiconductors via molecular linkers  being  another closely related interesting problem involving  not only carrier relaxation but also transport between the dots and the substrate.  Inelastic electron tunneling at molecular junctions holds several promises and  the full electron-vibrational dynamics of the tunneling process is being currently explored. Finally we would like to use laser control of various molecular modes and steer ultrafast processes along  preferred pathways toward useful target states of the molecular system.

Selected Publications

  • "Theory of coherent molecule to surface electron injection: An analytical model", S. Ramakrishna, Tamar Seideman, F. Willig and V. May, J. Chem. Sci. 121, 589 (2009).
  • "High harmonic generation as a probe of  rotational dynamics", S. Ramakrishna and Tamar Seideman,  Phy. Rev. A 77, 053411 (2008).
  • "Optimal control of rotational motions in dissipative media", Adam Pelzer, S. Ramakrishna and Tamar Seideman, J. Chem. Phys.  129, 134301 (2008).
  • "Information content of high harmonics generated from aligned molecules", S. Ramakrishna and Tamar Seideman, Phy. Rev. Lett. 99, 113901 (2007).
  • "Torsional control by intense pulses", S. Ramakrishna and Tamar Seideman, Phy. Rev. Lett. 99, 103001 (2007).
  • "Intense laser alignment in dissipative media as a route to solvent dynamics",  S. Ramakrishna and Tamar Seideman, Phys. Rev. Lett.  95, 113001 (2005).

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August 26, 2013