Experimental determination of nanocomposite grating structures by light- and neutron-diffraction in the multi-wave-coupling regime

Author(s)
Martin Fally, Yasuo Tomita, Antonio Fimia, Roque F. Madrigal, Jinxin Guo, Joachim Kohlbrecher, Jürgen Klepp
Abstract

We experimentally demonstrate how to accurately retrieve the refractive index profile of photonic structures by standard diffraction experiments and use of the rigorous coupled-wave analysis in the multi-wave coupling regime, without the need for taking any auxiliary data. In particular, we show how the phases of the Fourier components of a periodic structure can be fully recovered by deliberately choosing a probe wavelength of the diffracting radiation much smaller than the lattice constant of the structure. In the course of our demonstration, we accurately determine the slight asymmetry of the structure of nanocomposite phase gratings by light and neutron diffraction measurements. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Organisation(s)
Physics of Functional Materials
External organisation(s)
The University of Electro-Communications, Universidad Miguel Hernández de Elche, Eidgenössische Technische Hochschule Zürich, Paul Scherrer Institute
Journal
Optics Express
Volume
29
Pages
16153-16163
No. of pages
11
ISSN
1094-4087
DOI
https://doi.org/10.1364/OE.424233
Publication date
05-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103021 Optics
Keywords
ASJC Scopus subject areas
Atomic and Molecular Physics, and Optics
Portal url
https://ucris.univie.ac.at/portal/en/publications/experimental-determination-of-nanocomposite-grating-structures-by-light-and-neutrondiffraction-in-the-multiwavecoupling-regime(0492554f-890e-474d-9b0a-ae19c7f03fe3).html