The field of attosecond science provides exciting opportunities for ultrafast measurement and control at the level of electrons. My research is geared towards the new applications of attosecond spectroscopy to address questions in the areas of Atomic and Molecular Physics, Chemical Physics and Nanomaterials research. Recently, we demonstrated the use of extreme ultraviolet, attosecond light bursts to strobe the motion of an electron in a polyatomic molecule and film its coherent evolution near a conical intersection. At this intersection, the simple energy landscape picture breaks down and the electron is essentially at molecular crossroads. Our results shed light on the question of how strongly electrons and nuclei influence each other during charge transfer reactions.
Honors and Awards:
CAREER Award, National Science Foundation (2010)
Excellence in Undergraduate Physics Teaching, University of Arizona (2010)
Young Scientist Medal, Indian National Science Academy (2007)
Henry Timmers, Zheng Li, Niranjan Shivaram, Robin Santra, Oriol Vendrell, and Arvinder Sandhu, “Coherent electron hole dynamics near a conical intersection” (Submitted).
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).
Adam Roberts. Daniel Cormode, Collin Reynolds, Ty Newhouse-Illige, Brian LeRoy, Arvinder Sandhu, “Response of graphene to femtosecond high-intensity laser irradiation” Appl. Phys. Lett. 99, 051912 (2011).