TR-ARPES is a cutting-edge technique that has rapidly matured over the past two decades, becoming a powerful tool for exploring the equilibrium and dynamical properties of quantum materials via light-matter interaction. This technique combines time-resolved angle-resolved photoemission spectroscopy (TR-ARPES) with ultrafast laser pulses, providing unprecedented insights into the electronic structure and many-body dynamics of complex materials.
Unveiling Ultrafast Dynamics: TR-ARPES allows researchers to capture the real-time evolution of electronic states, revealing the ultrafast dynamics of charge carriers, spin, and other quasiparticles. By using ultrashort laser pulses to perturb the system and then probing the subsequent relaxation processes, TR-ARPES can elucidate the intricate mechanisms governing the non-equilibrium behavior of quantum materials.
Probing Excitations and Interactions: The technique’s ability to resolve both energy and momentum of the photoelectrons enables the mapping of the electronic band structure and the identification of key excitations, such as quasiparticles, collective modes, and coherent phenomena. These insights into the interplay between electronic, lattice, and spin degrees of freedom are crucial for understanding the complex many-body physics underlying the properties of quantum materials.
Advancing Quantum Material Research: TR-ARPES has been pivotal in the study of a wide range of quantum materials, including high-temperature superconductors, topological insulators, strongly correlated systems, and emerging quantum materials. By providing a unique window into the ultrafast dynamics and many-body interactions in these materials, TR-ARPES has driven significant advancements in our understanding of their fundamental properties and potential applications.