Vivek Pareek

Vivek Pareek is a David and Ellen Lee Postdoctoral Scholar Research Associate in Physics at the California Institute of Technology (Caltech), affiliated with the Division of Physics, Mathematics and Astronomy. His research focuses on the dynamics of excitons and quantum phases in two-dimensional (2D) semiconductors and van der Waals heterostructures. He employs advanced spectroscopic techniques such as time-resolved ARPES (Angle-Resolved Photoemission Spectroscopy) and ultrafast imaging to study exciton-driven phenomena, including Floquet-Bloch states, valley-polarized excitons, and moiré-localized interlayer excitons.

Key research themes include:

• Exciton dynamics in 2D materials
• Ultrafast control of quantum phases via excitonic fields
• Imaging momentum-resolved exciton properties
• Development of high-repetition rate XUV sources for time-resolved studies

His work bridges condensed matter physics, quantum materials science, and ultrafast spectroscopy, with applications in optoelectronics and topological materials. Recent contributions include direct visualization of valley-polarized excitons and experimental studies of Floquet engineering in 2D semiconductors.