A1 Journal article (refereed), original research
Determination of complex refractive index of SU-8 by Kramers-Kronig dispersion relation method at the 2.5 – 22.0 µm
Open Access publication
Publication Details Authors: Ashraf Shakeel, Niskanen Ilpo, Kanyathare Boniphace, Vartiainen Erik, Mattsson Claes, Heikkilä Rauno, Thungström Göran
Publisher: Elsevier
Publication year: 2018
Language: English
Related Journal or Series Information: Journal of Quantitative Spectroscopy and Radiative Transfer Volume number: 224
Start page: 309
End page: 311
Number of pages: 3
ISSN: 0022-4073
eISSN: 1879-1352
JUFO-Level of this publication: 2
Open Access: Open Access publication
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Abstract
Accurate determination of the complex refractive index of SU-8 epoxy has significant for the wide variety of applications in optical sensor technology at IR range. The complex refractive index of SU-8 is determined by recording the transmission of light spectra for the wavelength range of 2.5 – 22.0 µm. The data analysis is based on the Kramers-Kronig dispersion relation method. The method has several merits, such as ease of operation, non-contact technique, measurement accuracy, and rapid measurement. The present method is not restricted to the case of SU-8 but it is also proposed to be applicable across a broad range of applications, such as assessment of the optical properties of paints and biomedical samples.