46 citations · 172 across the 13 of their papers we have counts for
14 papers
Electronic Symmetry and Femtosecond Coherence Dynamics of Renner-Teller-Mixed Neutral Vibronic States in Carbon Dioxide
Eric Liu, Shashank Kumar, Siddhant Pandey +7
When non-adiabatic coupling mixes electronic states of a molecule, vibronic states of different electronic symmetry become interleaved across the same spectral region. The symmetry…
Molecular Axis Distribution Moments in Ultrafast Transient Absorption Spectroscopy: A Path Towards Ultrafast Quantum State Tomography
Shashank Kumar, Eric Liu, Liang Z. Tan +2
In ultrafast experiments with gas phase molecules, the alignment of the molecular axis relative to the polarization of the interacting laser pulses plays a crucial role in determin…
Time resolved quantum tomography in molecular spectroscopy by the Maximal Entropy Approach
Varun Makhija, Rishabh Gupta, Simon Neville +3
Attosecond science offers unprecedented precision in probing the initial moments of chemical reactions, revealing the dynamics of molecular electrons that shape reaction pathways.…
Ultrafast Field-Resolved Nonlinear Optical Spectroscopy in the Molecular Frame
Siddhant Pandey, Liang Z. Tan, Francis Walz +2
We resolve the real-time electric field of a femtosecond third-order nonlinear optical signal in the molecular frame. The electric field emitted by the induced third-order polariza…
Ultrafast Molecular Frame Quantum Tomography
Luna Morrigan, Simon P. Neville, Margaret Gregory +8
We develop and experimentally demonstrate a methodology for a full molecular frame quantum tomography (MFQT) of dynamical polyatomic systems. We exemplify this approach through the…
A Laboratory Frame Density Matrix for Ultrafast Quantum Molecular Dynamics
Margaret Gregory, Simon Neville, Michael Schuurman +1
In most cases the ultrafast dynamics of resonantly excited molecules are considered, and almost always computed in the molecular frame, while experiments are carried out in the lab…
Topical Review: Extracting Molecular Frame Photoionization Dynamics from Experimental Data
Paul Hockett, Varun Makhija
Methods for experimental reconstruction of molecular frame (MF) photoionization dynamics, and related properties - specifically MF photoelectron angular distributions (PADs) and co…
Applying Bayesian Inference and deterministic anisotropy to retrieve the molecular structure distribution from gas-phase diffraction experiments
Kareem Hegazy, Varun Makhija, Phil Bucksbaum +12
Currently, our general approach to retrieving molecular structures from ultrafast gas-phase diffraction heavily relies on complex ab initio electronic or vibrational excited state…
Strong Field Ionization of Water: Nuclear Dynamics Revealed by Varying the Pulse Duration
A. J. Howard, C. Cheng, R. Forbes +6
Polyatomic molecules in strong laser fields can undergo substantial nuclear motion within tens of femtoseconds. Ion imaging methods based on dissociation or Coulomb explosion there…
Molecular Frame Photoelectron Angular Distributions in Polyatomic Molecules from Lab Frame Coherent Rotational Wavepacket Evolution
Margaret Gregory, Paul Hockett, Albert Stolow +1
The application of a matrix-based reconstruction protocol for obtaining Molecular Frame (MF) photoelectron angular distributions (MFPADs) from laboratory frame (LF) measurements (L…
Quantum Beat Photoelectron Imaging Spectroscopy of Xe in the VUV
Ruaridh Forbes, Varun Makhija, Jonathan Underwood +4
Time-resolved pump-probe measurements of Xe, pumped at 133~nm and probed at 266~nm, are presented. The pump pulse prepared a long-lived hyperfine wavepacket, in the Xe $5p^5(^2P^{\…
Time-resolved multi-mass ion imaging: femtosecond UV-VUV pump-probe spectroscopy with the PImMS camera
Ruaridh Forbes, Varun Makhija, Kévin Veyrinas +8
The Pixel-Imaging Mass Spectrometry (PImMS) camera allows for 3D charged particle imaging measurements, in which the particle time-of-flight is recorded along with position…
Bootstrapping to the Molecular Frame with Time-domain Photoionization Interferometry
Claude Marceau, Varun Makhija, Dominique Platzer +5
Photoionization of molecular species is, essentially, a multi-path interferometer with both experimentally controllable and intrinsic molecular characteristics. In this work, XUV p…
Orientation Resolution through Rotational Coherence Spectroscopy
Varun Makhija, Xiaoming Ren, Drue Gockel +2
The rich information content of measurements in the molecular frame rather than the laboratory frame has motivated the development of several methods for aligning gas phase molecul…