Surface resonant Raman scattering from Cu(110)

Description

We have recently demonstrated the possibility to investigate surface phonons on metals by surface resonant Raman spectroscopy (SRRS), in which the Raman cross section is significantly enhanced by resonant excitation of optical transitions involving surface electronic states [1]. Expanding on this work, we investigate the phonon and electron scattering mechanism on clean and adsorbate-modified Cu(110) surfaces using SRRS and reflectance difference spectroscopy (RDS) under ultra-high vacuum (UHV) conditions and variable temperatures. While modifications of the Cu(110) surface via ion bombardment and by adsorption of small molecules such as O2 ,CO are expected to influence Raman signals, our results indicate that such effects are strongly dependent on the excitation wavelength. We plan to further explore this wavelength dependence and perform complementary measurements with 1.9 eV laser excitation, aiming to probe adsorbate-induced modifications.


[1] M. Denk et al., Phys. Rev. Lett. 128, 216101 (2022). https://doi.org/10.1103/PhysRevLett.128.216101

Period	02 Jun 2025
Event title	ECSCD16/ICSOS14
Event type	Conference
Location	Wien, AustriaShow on map
Degree of Recognition	International