Bonn 2025 – wissenschaftliches Programm

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AKjDPG: Arbeitskreis junge DPG

AKjDPG 3: Time-resolved Spectroscopy

AKjDPG 3.1: Tutorium

Sonntag, 9. März 2025, 14:00–14:50, HS 5+6

Ultrafast spectroscopy — •Anchit Srivastava — Max Planck Institute for the Science of Light, Staudstrasse 2, 91058 Elangen, Germany.

Ultrafast spectroscopy has become a powerful tool for unravelling fundamental interactions in molecules, nanostructures, and solids. It enables the observation of processes on timescales from picoseconds to attoseconds. In this tutorial, I will introduce three pivotal techniques in modern ultrafast science: pump-probe, dual-comb, and field-resolved spectroscopy. We begin by discussing the pump-probe method, which monitors transient states by exciting a sample with an ultrashort pump pulse and tracking its dynamics with a temporally delayed probe pulse. Next, we explore dual-comb spectroscopy, emphasizing how two precisely stabilized frequency combs yield rapid, high-resolution data over broad spectral ranges. Lastly, we delve into field-resolved spectroscopy, a novel approach that allows direct measurement of the electric field of light pulses in ambient conditions. Through technological developments, field-resolved methods now extend from the terahertz to the petahertz domain, providing unprecedented temporal resolution down to the attosecond regime. By combining these techniques, researchers can thoroughly characterize ultrafast processes in a variety of materials, thereby deepening our understanding of energy transfer, charge dynamics, and fundamental light-matter interactions. This tutorial aims to equip students with the essential knowledge to tackle these rapidly evolving methodologies.