Effective spectral dispersion of refractive index modulation

0475295 - ÚFP 2018 RIV GB eng J - Článek v odborném periodiku
Vojtíšek, Petr - Květoň, M. - Richter, I.
Effective spectral dispersion of refractive index modulation.
Journal of Optics. Roč. 19, č. 4 (2017), č. článku 045603. ISSN 2040-8978. E-ISSN 2040-8986
Grant CEP: GA MŠMT(CZ) LO1206
Institucionální podpora: RVO:61389021
Klíčová slova: volume gratings * holography * dispersion * refractive index modulation
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 2.323, rok: 2017
http://iopscience.iop.org/article/10.1088/2040-8986/aa6092/meta

For diffraction effects inside photopolymer materials, which act as volume diffraction systems (e.g. gratings), refractive index modulation is one of the key parameters. Due to its importance it is necessary to study this parameter from many perspectives, one of which is its value for different spectral components, i.e. its spectral dispersion. In this paper, we discuss this property and present an approach to experimental and numerical extraction and analysis (via rigorous coupled wave analysis and Cauchy’s empirical relation) of the effective dispersion of refractive index modulation based on an analysis of transmittance maps measured in an angular-spectral plane. It is indicated that the inclusion of dispersion leads to a significantly better description of the real grating behavior (which is often necessary in various design implementations of diffraction gratings) and that this estimation can be carried out for all the diffraction orders present.
Trvalý link: http://hdl.handle.net/11104/0272136