Field Manipulation of Band Properties in Infrared Spectra of Thin Films
Artikel i vetenskaplig tidskrift, 2023

This comprehensive optical study analyzes field manipulations of bands in infrared (IR) spectra of thin films and functional surfaces for varying measurement and sample conditions. Band variations related to the materials dielectric functions, the measurement geometry, the film thickness as well as the direction dependence of the probing electromagnetic fields are demonstrated. Examples are discussed for isotropic polymer films (approximate to 200 nm polymethylmethacrylate [PMMA]) on gold and silicon as well as an anisotropic hydrogen monolayer on a Si(111) surface, characterized by IR-attenuated total reflection, IR microscopy, and incidence-angle-dependent IR polarimetry. Even for fixed optical material properties, significant manipulations of band frequency and shape (shifts up to approximate to 14 cm-1 for PMMA, up to approximate to 3 cm-1 for H-Si) occur in not only polarization-dependent but also unpolarized spectra. The shown data underline that polarimetric measurements and optical analyses are essential for a detailed interpretation of band shapes. Field manipulations of bands in infrared spectra of thin films and functional surfaces are discussed. Examples are isotropic polymer films on gold and silicon as well as an anisotropic hydrogen monolayer on Si(111). Band variations relate to the materials dielectric functions, the measurement geometry, the film thickness as well as the polarization of the probing electromagnetic fields.image (c) 2023 WILEY-VCH GmbH

infrared spectroscopy

polarimetry

optical simulations

hydrogen-passivated silicon

physics of light

polymer films

photonic materials

Författare

Karsten Hinrichs

Leibniz Inst Analyt Wissensch ISAS eV

Naveen Shetty

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Sergey Kubatkin

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Per Malmberg

Chalmers, Kemi och kemiteknik, Kemi och biokemi

Samuel Lara Avila

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Andreas Furchner

Helmholtz Zent Berlin Mat & Energie GmbH

Joerg Rappich

Helmholtz Zent Berlin Mat & Energie GmbH

ADVANCED PHOTONICS RESEARCH

2699-9293 (ISSN)

Vol. In Press

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1002/adpr.202300212

Mer information

Senast uppdaterat

2023-12-07