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Timeline

Python package released

Welcome! This is ocdb, a Python package for easily accessing the X-ray/EUV/VUV scattering and absorption data contained in the Optical Constants Database (OCDB) provided by the German National Metrology Institute, the Physikalisch-Technische Bundesanstalt, PTB.

Features

 

A list of (planned) features:

  • Access to X-ray/EUV/VUV scattering and absorption coefficients (n and k)
  • Interface compatible to the periodictable Python package
  • Provides data and uncertainties
  • FAIR and linked data: citable, reliable, and reproducible
  • Offline access: data contained in package
  • Community-driven: easy to contribute

And to make it even more convenient for users and future-proof:

  • Open source project written in Python (>= 3.9)
  • Developed fully test-driven
  • Extensive user and API documentation

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

https://doi.org/10.1364/OE.426029

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

https://doi.org/10.1364/AO.472556

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

https://doi.org/10.1364/OME.474887

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

https://doi.org/10.1016/j.ijleo.2022.170455

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