Spectroscopic ellipsometry mapping of PAAO:Au (AJ-5-04-27-Au sample)

Spectroscopic ellipsometry measurement data obtained from the porous anodized aluminum oxide covered with gold nanoparticles (PAAO:Au). The sample was made by anodization of aluminum monocrystal in 0.3 mol/L oxalic acid at 40 V for 4 minutes and 57 seconds. Then it was dip-coated in 60 nm diameter gold nanoparticles suspension. Extraction speed was 500 nm/s.

The measurements were carried out at 20 × 20 locations covering all of the sample surface (approximately 4.8 × 4.8 mm2). The coordinates of each of 400 locations are available in "mapping_points.csv" file. All measurement data is also included in a single "AJ-5-04-27-Au Ellipsometry Mapping Measurements.rar" file.

Ellipsometer: rotating compensator GES5-E (Semilab).

Light source: 75 W xenon short arc lamp with 185-2000 nm wavelength spectrum.

Detector: UV-Vis CCD with 0.8 nm resolution.

Spectral range: approximately 230-960 nm.

Light incidence angles: 50°, 55°, 60°, 65°, 70°, 75°.

Light beam size: microspot (365 × 470 μm2 at 75° angle of incidence).

The same sample was also measured using the same spectroscopic ellipsometry method before being covered with gold nanoparticles. The data can be found here: https://doi.org/10.5281/zenodo.5734894