Arvinder Sandhu - Research Interests

Ultrafast atomic, molecular and optical science has undergone quite a revolution in the last few years. The arrival of ultrafast extreme-ultraviolet (XUV) sources in the form of attosecond-duration, high-frequency, coherent light pulses has led to the birth of a new field, termed as ‘attosecond science’. The excitement in this field arises from the possibility of observation and control at the level of electrons, which typically undergo dynamics on the timescale of attoseconds. My research is geared towards the new applications of attosecond spectroscopy tools in the fields of Atomic and Molecular Physics, Chemical Physics and Nanomaterials research. In our recent work, we have focused on the real-time probing and control of attosecond electron dynamics in atoms, the coupled electron-nuclear dynamics in molecules, and the ultrafast many-body interactions in carbon nanomaterials. For my publications, presentations, patents, etc see - Arvinder Sandhu CV

Current research efforts in my group include -

  • Efficient generation of isolated attosecond pulses in the XUV regime

  • Attosecond resolved studies of electronic response in strong fields.

  • Correlation driven charge migration in molecules.

  • Electronic relaxation near conical intersections of polyatomics.

  • Ultrafast, high-intensity response of nanomaterials.

  • Many-body interactions in carbon nano-structures

  • The experimental techniques used in my lab are:

    Velocity Map Imaging and Attosecond Transient Absorption

    Recent Publications (Highlights)-

  • Henry Timmers, Zheng Li, Niranjan Shivaram, Robin Santra, Oriol Vendrell, and Arvinder Sandhu, “Coherent electron hole dynamics near a conical intersection” Phys. Rev. Lett. 113, 113003 (2014).

  • Adam Roberts, Rolf Binder, Nai-Hang Kwong, Dheeraj Golla, Daniel Cormode, Brian LeRoy, Henry Everitt, Arvinder Sandhu, “Optical characterization of electron-phonon interactions at the saddle point in graphene”, Phys. Rev. Lett. 112, 187401 (2014).

  • Henry Timmers, Niranjan Shivaram and Arvinder Sandhu, “Ultrafast dynamics of neutral superexcited Oxygen: A direct measurement of the competition between autoionization and predissociation” Phys. Rev. Lett. 109, 173001 (2012).

  • Niranjan Shivaram, Henry Timmers, Xiao-Min Tong, and Arvinder Sandhu, “Attosecond-resolved evolution of a laser-dressed Helium atom: Interfering excitation paths and quantum phases” Phys. Rev. Lett. 108, 193002 (2012).