Bonn 2025 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 21: Poster – Atomic Systems in External Fields
A 21.6: Poster
Mittwoch, 12. März 2025, 17:00–19:00, Tent
Photoelectron emission from silver clusters on substrates — •Mikhail Bednov and Dieter Bauer — Institute of Physics, University of Rostock, Germany
We investigate the photoelectron emission from silver clusters of 5 to 15 nanometers in size, deposited on silica substrates with a thin oxidation layer. The particles are illuminated by an 800 nm laser with an intensity of approximately 10 GW/cm2.
The field distribution is calculated classically using the Green’s dyadic method, which provides a good description of electric field enhancement around the particle. This allows us to identify areas of highest field enhancement and calculate the rate of field decay from the particle.
Quantum simulations based on time-dependent density functional theory are performed in one dimension, along the direction of dominant electron emission from corners of the particle where the field enhancement is largest. The aim of these studies is to elucidate the role of the plasmon resonance in the emission process.
Keywords: cluster; tddft