Number of the records: 1
Anisotropy of 3D Columnar Coatings in Mid-Infrared Spectral Range
- 1.0554109 - FZÚ 2022 RIV CH eng J - Journal Article
Grineviciute, L. - Ng, S. - Han, M. - Moein, T. - Anand, V. - Katkus, T. - Ryu, M. - Morikawa, J. - Tobin, M. - Vongsvivut, J. - Tolenis, Tomas - Juodkazis, S.
Anisotropy of 3D Columnar Coatings in Mid-Infrared Spectral Range.
Nanomaterials. Roč. 11, č. 12 (2021), č. článku 3247. E-ISSN 2079-4991
Research Infrastructure: ELI Beamlines III - 90141
Institutional support: RVO:68378271
Keywords : polarisation * IR * fingerprint region * birefringence * dichroism * sculptured thin films * anisotropy
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 5.719, year: 2021
Method of publishing: Open access
Polarisation analysis in the mid-infrared fingerprint region was carried out on thin (∼1 μm) Si and SiO2 films evaporated via glancing angle deposition (GLAD) method at 70∘ to the normal. Synchrotron-based infrared microspectroscopic measurements were carried out on the Infrared Microspectroscopy (IRM) beamline at Australian Synchrotron. Specific absorption bands, particularly Si-O-Si stretching vibration, was found to follow the angular dependence of ∼cos2θ, consistent with the absorption anisotropy. This unexpected anisotropy stems from the enhanced absorption in nano-crevices, which have orientation following the cos2θ angular dependence as revealed by Fourier transforming the image of the surface of 3D columnar films and numerical modeling of light field enhancement by sub-wavelength nano-crevices.
Permanent Link: http://hdl.handle.net/11104/0328748
File Download Size Commentary Version Access 0554109.pdf 0 4.2 MB CC Licence Publisher’s postprint open-access
Number of the records: 1