Infrared Ellipsometric Investigations of Free Carriers and Lattice Vibrations in Superconducting Cuprates

Chaloupka, Jiří; Munzar, Dominik; Humlíček, Josef

doi:10.1007/978-3-642-33956-1_12

Cited by 1 publication

(1 citation statement)

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“…For IR spectroscopic studies of anisotropic properties on macroscopic length scales, 35,43–75 infrared spectroscopic ellipsometry (IRSE) and polarimetry are the characterization methods of choice. 70–75 However, even in conjunction with brilliant light sources, the anisotropy connected with molecular ordering and morphology variations on the scale of 10–100 nm cannot be experimentally addressed because these IR techniques are diffraction limited far-field approaches. Near-field concepts can be exploited for IR nanoscale studies with various kinds of measurement geometries.…”

Section: Introductionmentioning

confidence: 99%

Polarization-Dependent Atomic Force Microscopy–Infrared Spectroscopy (AFM-IR): Infrared Nanopolarimetric Analysis of Structure and Anisotropy of Thin Films and Surfaces

Hinrichs

Shaykhutdinov

2018

Appl Spectrosc

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Infrared techniques enable nondestructive and label-free studies of thin films with high chemical and structural contrast. In this work, we review recent progress and perspectives in the nanoscale analysis of anisotropic materials using an extended version of the atomic force microscopy-infrared (AFM-IR) technique. This advanced photothermal technique, includes polarization control of the incoming light and bridges the gap in IR spectroscopic analysis of local anisotropic material properties. Such local anisotropy occurs in a wide range of materials during molecular nucleation, aggregation, and crystallization processes. However, analysis of the anisotropy in morphology and structure can be experimentally and theoretically demanding as it is related to order and disorder processes in ranges from nanoscopic to macroscopic length scales, depending on preparation and environmental conditions. In this context IR techniques can significantly assist as IR spectra can be interpreted in the framework of optical models and numerical calculations with respect to both, the present chemical conditions as well as the micro- and nanostructure. With these extraordinary analytic possibilities, the advanced AFM-IR approach is an essential puzzle piece in direction to connect nanoscale and macroscale anisotropic thin film properties experimentally. In this review, we highlight the analytic possibilities of AFM-IR for studies on nanoscale anisotropy with a set of examples for polymer, plasmonic, and polaritonic films, as well as aggregates of large molecules and proteins.

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