482 citations · 872 across the 23 of their papers we have counts for
7 papers · 1 filter
Attosecond Control of Squeezed Light
Russell Zimmerman, Shashank Kumar, Shiva Kant Tiwari +9
Squeezed light is a key resource in quantum metrology and quantum information science. It is primarily generated through nonlinear optical interactions, where the degree of squeezi…
Strong-field Driven Sub-cycle Band Structure Modulation and Dephasing Control
Francis Walz, Shashank Kumar, Amirali Sharifi Olounabadi +6
Over the past decade, ultrafast electron dynamics in the solid state have been extensively studied using various strong light-matter interaction techniques, such as high-harmonic g…
Broadband femtosecond lasers enable efficient two-photon excitation of the ultranarrow linewidth singlet 1s2s state in helium
Shashank Kumar, Justin D. Piel, Chris H. Greene +1
We propose a broadband, femtosecond two-photon excitation scheme for efficient population transfer to the ultra-narrow linewidth metastable state in helium. Using $12…
Interplay between ultrafast electronic and librational dynamics in liquid nitrobenzene probed with two-color four-wave mixing
Niranjan Shivaram, Richard Thurston, Ali Belkacem +3
We present an experimental and theoretical study of the interplay between ultrafast electron dynamics and librational dynamics in liquid nitrobenzene. A femtosecond ultraviolet pul…
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…
Femtosecond Temporal Phase-Resolved Nonlinear Optical Spectroscopy in Molecules with Lock-in Enabled Phase Tracking
Siddhant Pandey, Francis Walz, Niranjan Shivaram
We describe an experiment to measure the emitted real-time electric field from an ultrafast third-order nonlinear optical interaction in molecules, using a phase-tracked spectral i…