Timeline
New Database Record
Ru n&k from 8.0 nm - 23.75 nm
Time-frequency analysis assisted determination of ruthenium optical constants in the sub-EUV spectral range 8 nm – 23.75 nm
Qais Saadeh et al. 2021
New Database Record
Ta n&k from 5 nm - 24 nm
Nested Sampling aided determination of tantalum optical constants in the EUV spectral range
Qais Saadeh et al. 2022

Update on the 13.5nm optical constants overview
Updated figure for quick overview over the 13.5nm optical constants. Current optical constants published in the following journal papers:
- Saadeh, Qais et al. Optics Express 29.25 (2021): 40993-41013.
- Andrle, Anna et al. Journal of Applied Crystallography 54.2 (2021): 402-408.
- Saadeh, Qais et al Applied Optics 61.33 (2022): 10032-10042.
- Ciesielski, Richard et al. Applied Optics 61.8 (2022): 2060-2078.
- Saadeh, Qais et al. Optical Materials Express 13.1 (2023): 78-91.
- Saadeh, Qais et al. Optik 273 (2023): 170455.
New Database Record
Optical constants for TaCo
Reconstructed from reflection measurements in the wavelength range 8 - 22 nm
Tunability of the optical constants of tantalum-cobalt alloy thin films in the extreme ultraviolet Optical Materials Express Vol. 13, Issue 1, pp. 78-91 (2023)
Qais Saadeh, Vicky Philipsen, Devesh Thakare, Philipp Naujok, Meiyi Wu, Frank Scholze, Christian Buchholz, Claudia Tagbo-Fotso, Ayhan Babalik, Bettina Kupper, and Victor Soltwisch

New Database Record
Co n&k from 8 nm - 25 nm
On the optical constants of cobalt in the M-absorption edge region
Qais Saadeh et al. 2023

New Database Record
Added Quartz n&k data 45 eV to 620 eV.
A. Andrle et al. J. Appl. Cryst. (2021). 54, 402-408 https://doi.org/10.1107/S1600576720016325 Quartz Data https://zenodo.org/record/4118056
Website
launch of the website ocdb.ptb.de

New Database Records
Mo, Ni, Pt, Ru, Ta, Te, Ni2 Al3, Ni3 Al, NiAl, Pt2Mo, PtMo, PtTe, RuTa, Ru3Ta, Ru3Re, Ru3W, TaBN, TaTeN
Publication https://doi.org/10.5281/zenodo.5607168 Full data set: doi.org/10.5281/zenodo.5602719