Paul Arpin

Dr. Paul Arpin is an Associate Professor in the Department of Physics at California State University, Chico. His research focuses on ultrafast optical spectroscopy, quantum optics, and nonlinear phenomena in molecular and condensed matter systems. He leads experimental and theoretical investigations into femtosecond coherence spectroscopy, high-harmonic generation, and light-matter interactions in biological systems like photosynthetic proteins.

Key research areas include:

• Molecular aggregates and excitonic dynamics
• Ultrafast X-ray and soft X-ray generation
• Vibrational coherence and quantum beats
• Coherent multidimensional optical spectroscopy

His work bridges theoretical modeling with advanced laser spectroscopy techniques, contributing to understanding energy transfer mechanisms in both synthetic and biological systems. Recent studies highlight advancements in femtosecond coherence spectroscopy for analyzing vibronic coupling and Duschinsky rotation effects.

Dr. Arpin’s experimental setups involve cutting-edge ultrafast laser systems and parametric amplifiers, enabling exploration of attosecond-to-femtosecond timescales. His lab collaborates on projects related to tabletop X-ray sources and phase-matched high-harmonic generation.