Anisotropic 3D columnar micro-film coating for applications in infrared and visible spectral ranges
dc.contributor.author | Hu, J. | |
dc.contributor.author | Han, M. | |
dc.contributor.author | Grineviciute, L. | |
dc.contributor.author | Ng, S.H. | |
dc.contributor.author | Anand, V. | |
dc.contributor.author | Katkus, T. | |
dc.contributor.author | Ryu, M. | |
dc.contributor.author | Morikawa, J. | |
dc.contributor.author | Tobin, M.J. | |
dc.contributor.author | Vongsvivut, J. | |
dc.contributor.author | Tolenis, T. | |
dc.date.accessioned | 2023-07-05T08:13:39Z | |
dc.date.available | 2023-07-05T08:13:39Z | |
dc.date.issued | 2022 | |
dc.description.abstract | Polarisation analysis of thin (∼1 μm) SiO2 films deposited via evaporation at a glancing angle of 70◦ to the normal on resist pillar arrays was carried out using synchrotron-based Fourier transform infrared (s-FTIR) microspectroscopy in reflection mode. Changes in intensity of absorption bands were observed to follow the angular dependence of ∼ cos2 𝜃, consistent with the absorption anisotropy. The strongest absorption was found to be the sharp Si–O–Si stretching vibrational mode at 1040 ± 20 cm−1, which can be used for sensor applications, as well as radiative cooling in the atmospheric transparency window, within the range of 8-13 μm (i.e. 1250-769 cm−1). Anisotropy of IR absorbance is correlated with retardance/birefringence of the same patterns in the visible spectral range. Larger period patterns of 3D columnar SiO2 films of ∼1 μm in thickness deposited on polymer/resist pillar arrays provide the possibility to control anisotropy of the form-birefringent 3D columnar films. | et |
dc.identifier.uri | https://doi.org/10.1016/j.apsusc.2022.152910 | |
dc.identifier.uri | https://hdl.handle.net/10062/91331 | |
dc.language.iso | eng | et |
dc.publisher | Elsevier B.V. | et |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/857627///CIPHR | et |
dc.relation.ispartofseries | Applied Surface Science;590, p.152910 | |
dc.rights | info:eu-repo/semantics/openAccess | et |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | IR Fingerprint region | et |
dc.subject | Atmospheric transparency window | et |
dc.subject | Birefringence | et |
dc.subject | Dichroism | et |
dc.subject | Sculptured thin films | et |
dc.title | Anisotropic 3D columnar micro-film coating for applications in infrared and visible spectral ranges | et |
dc.type | info:eu-repo/semantics/article | et |