liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Mueller matrix ellipsometry studies of nanostructured materials
Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.ORCID iD: 0000-0002-6371-0638
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Materials can be tailored on the nano-scale to show properties that cannot be found in bulk materials. Often these properties reveal themselves when electromagnetic radiation, e.g. light, interacts with the material. Numerous examples of such types of materials are found in nature. There are for example many insects and birds with exoskeletons or feathers that reflect light in special ways. Of special interest in this work is the scarab beetle Cetonia aurata which has served as inspiration to develop advanced nanostructures due to its ability to turn unpolarized light into almost completely circularly polarized light. The objectives of this thesis are to design and characterize bioinspired nanostructures and to develop optical methodology for their analysis.

Mueller-matrix ellipsometry has been used to extract optical and structural properties of nanostructured materials. Mueller-matrix ellipsometry is an excellent tool for studying the interaction between nanostructures and light. It is a non-destructive method and provides a complete description of the polarizing properties of a sample and allows for determination of structural parameters.

Three types of nanostructures have been studied. The rst is an array of carbon nanobers grown on a conducting substrate. Detailed information on physical symmetries and band structure of the material were determined. Furthermore, changes in its optical properties when the individual nanobers were electromechanically bent to alter the periodicity of the photonic crystal were studied. The second type of nanostructure studied is bioinspired lms with nanospirals of InxAl1–xN which reflect light with a high degree of circular polarization in a narrow spectral band. These nanostructures were grown under controlled conditions to form columnar structures with an internally graded refractive index responsible for the ability to reflect circularly polarized light. Finally, angle-dependent Mueller matrices were recorded of natural nanostructures in C. aurata with the objective to refine the methodology for structural analysis. A Cloude sum decomposition was applied and a more stable regression-based decomposition was developed for deepened analysis of these depolarizing Mueller matrices. It was found that reflection at near-normal incidence from C. aurata can be described as a sum reflection o a mirror and a left-handed circular polarizer. At oblique incidence the description becomes more complex and involves additional optical components.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2014. , 46 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1631
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-111947DOI: 10.3384/diss.diva-111947ISBN: 978-91-7519-200-0 (print)OAI: oai:DiVA.org:liu-111947DiVA: diva2:762274
Public defence
2014-12-12, Planck, Fysikhuset, Campus Valla, Linköpings universitet, Linköping, 09:15 (English)
Opponent
Supervisors
Available from: 2014-11-11 Created: 2014-11-11 Last updated: 2015-09-22Bibliographically approved
List of papers
1. Chirality-induced polarization effects in the cuticle of scarab beetles: 100 years after Michelson
Open this publication in new window or tab >>Chirality-induced polarization effects in the cuticle of scarab beetles: 100 years after Michelson
2012 (English)In: Philosophical Magazine, ISSN 1478-6435, E-ISSN 1478-6443, Vol. 92, no 12, 1583-1599 p.Article in journal (Refereed) Published
Abstract [en]

One hundred years ago Michelson discovered circular polarization in reflection from beetles. Today a novel Mueller-matrix ellipsometry setup allows unprecedented detailed characterization of the beetles polarization properties. A formalism based on elliptical polarization for description of reflection from scarab beetles is here proposed and examples are given on four beetles of different character: Coptomia laevis - a simple dielectric mirror; Cetonia aurata - a left-hand narrow- band elliptical polarizer; Anoplognathus aureus - a broad-band elliptical polarizer; and Chrysina argenteola - a left-hand polarizer for visible light at small angles, whereas for larger angles, red reflected light is right-handed polarized. We confirm the conclusion of previous studies which showed that a detailed quantification of ellipticity and degree of polarization of cuticle reflection can be performed instead of only determining whether reflections are circularly polarized or not. We additionally investigate reflection as a function of incidence angle. This provides much richer information for understanding the behaviour of beetles and for structural analysis.

Place, publisher, year, edition, pages
Taylor and Francis: STM, Behavioural Science and Public Health Titles / Taylor and Francis, 2012
Keyword
scarab beetles, Mueller-matrix ellipsometry, elliptical polarization, structural colours
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-77876 (URN)10.1080/14786435.2011.648228 (DOI)000303578700008 ()
Note
Funding Agencies|Knut and Alice Wallenberg foundation||Swedish Research Council||Available from: 2012-05-31 Created: 2012-05-31 Last updated: 2017-12-07
2. Chiral nanostructures producing near circular polarization
Open this publication in new window or tab >>Chiral nanostructures producing near circular polarization
Show others...
2014 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 4, no 7, 1389-1403 p.Article in journal (Refereed) Published
Abstract [en]

Optical properties of chiral nanostructured films made of Al1-xInxN using a new growth mechanism - curved-lattice epitaxial growth - are reported. Using this technique, chiral films with right- and left-handed nanospirals were produced. The chiral properties of the films, originating mainly from an internal anisotropy and to a lesser extent from the external helical shape of the nanospirals, give rise to selective reflection of circular polarization which makes them useful as narrow-band near-circular polarization reflectors. The chiral nanostructured films reflect light with high degree of circular polarization in the ultraviolet part of the spectrum with left- and right-handedness depending on the handedness of the nanostructures in the films.

Place, publisher, year, edition, pages
Optical Society of America, 2014
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-109241 (URN)10.1364/OME.4.001389 (DOI)000338875100013 ()
Available from: 2014-08-12 Created: 2014-08-11 Last updated: 2017-12-05Bibliographically approved
3. Optical Mueller Matrix Modeling of Chiral AlxIn1-xN Nanospirals
Open this publication in new window or tab >>Optical Mueller Matrix Modeling of Chiral AlxIn1-xN Nanospirals
Show others...
2014 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 571, 447-452 p.Article in journal (Refereed) Published
Abstract [en]

Metamaterials in the form of chiral nanostructures have shown great potential for applications such as chemical and biochemical sensors and broadband or wavelength tunable circular polarizers. Here we demonstrate a method to produce tailored transparent chiral nanostructures with the wide-bandgap semiconductor AlxIn1 − xN. A series of anisotropic and transparent films of AlxIn1 − xN were produced using curved-lattice epitaxial growth on metallic buffer layers. By controlling the sample orientation during dual magnetron sputter deposition, nanospirals with right-handed or left-handed chirality were produced. Using a dual rotating compensator ellipsometer in reflection mode, the full Mueller matrix was measured in the spectral range 245–1700 nm at multiple angles of incidence. The samples were rotated one full turn around their normal during measurements to provide a complete description of the polarization properties in all directions. For certain wavelengths, unpolarized light reflected off these films becomes highly polarized with a polarization state close to circular. Nanostructured films with right- and left-handed chirality produce reflections with right- and left-handed near-circularly polarized light, respectively. A model with a biaxial layer in which the optical axes are rotated from bottom to top was fitted to the Mueller-matrix data. Hence we can perform non-destructive structural analysis of the complex thin layers and confirm the tailored structure. In addition, the refractive index, modeled with a biaxial Cauchy dispersion model, is obtained for the AlxIn1 − xN films.

Place, publisher, year, edition, pages
Elsevier, 2014
Keyword
Chiral nanostructures; Mueller matrix spectroscopic ellipsometry; Anisotropy; Optical modeling;High degree of circular polarization
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-106421 (URN)10.1016/j.tsf.2014.02.015 (DOI)000346055200020 ()
Available from: 2014-05-07 Created: 2014-05-07 Last updated: 2017-12-05
4. Optical properties of carbon nanofiber photonic crystals
Open this publication in new window or tab >>Optical properties of carbon nanofiber photonic crystals
Show others...
2010 (English)In: NANOTECHNOLOGY, ISSN 0957-4484, Vol. 21, no 46, 465203- p.Article in journal (Refereed) Published
Abstract [en]

Carbon nanofibers (CNFs) are used as components of planar photonic crystals. Square and rectangular lattices and random patterns of vertically aligned CNFs were fabricated and their properties studied using ellipsometry. We show that detailed information such as symmetry directions and the band structure of these novel materials can be extracted from considerations of the polarization state in the specular beam. The refractive index of the individual nanofibers was found to be n(CNF) = 4.1.

Place, publisher, year, edition, pages
Institute of Physics; 1999, 2010
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-61309 (URN)10.1088/0957-4484/21/46/465203 (DOI)000283491000003 ()
Note

Original Publication: R Rehammar, Roger Magnusson, A I Fernandez-Dominguez, Hans Arwin, J M Kinaret, S A Maier and E E B Campbell, Optical properties of carbon nanofiber photonic crystals, 2010, NANOTECHNOLOGY, (21), 46, 465203. http://dx.doi.org/10.1088/0957-4484/21/46/465203 Copyright: Institute of Physics; 1999 http://www.iop.org/

Available from: 2010-11-12 Created: 2010-11-12 Last updated: 2015-09-22
5. Electromechanically Tunable Carbon Nanofiber Photonic Crystal
Open this publication in new window or tab >>Electromechanically Tunable Carbon Nanofiber Photonic Crystal
Show others...
2013 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 13, no 2, 397-401 p.Article in journal, Letter (Refereed) Published
Abstract [en]

We demonstrate an electrically tunable 2D photonic crystal array constructed from vertically alignedcarbon nanofibers. The nanofibers are actuated by applying a voltage between adjacent carbon nanofiberpairs grown directly on metal electrodes, thus dynamically changing the form factor of the photoniccrystal lattice. The change in optical properties is characterised using optical diffraction andellipsometry. The experimental results are shown to be in agreement with theoretical predictions andprovide a proof-of-principle for rapidly switchable photonic crystals operating in the visible that can befabricated using standard nanolithography techniques combined with plasma CVD growth of thenanofibers.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2013
Keyword
carbon nanofiber, nanoelectromechanics, diffraction, ellipsometry, form factor, tunable photonic crystal
National Category
Natural Sciences Nano Technology
Identifiers
urn:nbn:se:liu:diva-86730 (URN)10.1021/nl3035527 (DOI)000315079500012 ()
Available from: 2012-12-31 Created: 2012-12-31 Last updated: 2017-12-06
6. Sum decomposition of Mueller-matrix images and spectra of beetle cuticles
Open this publication in new window or tab >>Sum decomposition of Mueller-matrix images and spectra of beetle cuticles
Show others...
2015 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 23, no 3, 1951-1966 p.Article in journal (Refereed) Published
Abstract [en]

Spectral Mueller matrices measured at multiple angles of incidence as well as Mueller matrix images are recorded on the exoskeletons (cuticles) of the scarab beetles Cetonia aurata and Chrysina argenteola. Cetonia aurata is green whereas Chrysina argenteola is gold-colored. When illuminated with natural (unpolarized) light, both species reflect left-handed and near-circularly polarized light originating from helicoidal structures in their cuticles. These structures are referred to as circular Bragg reflectors. For both species the Mueller matrices are found to be nondiagonal depolarizers. The matrices are Cloude decomposed to a sum of non-depolarizing matrices and it is found that the cuticle optical response, in a first approximation can be described as a sum of Mueller matrices from an ideal mirror and an ideal circular polarizer with relative weights determined by the eigenvalues of the covariance matrices of the measured Mueller matrices. The spectral and image decompositions are consistent with each other. A regression-based decomposition of the spectral and image Mueller matrices is also presented whereby the basic optical components are assumed to be a mirror and a circular polarizer as suggested by the Cloude decomposition. The advantage with a regression decomposition compared to a Cloude decomposition is its better stability as the matrices in the decomposition are determined a priori. The origin of the depolarizing features are discussed but from present data it is not possible to conclude whether the two major components, the mirror and the circular polarizer are laterally separated in domains in the cuticle or if the depolarization originates from the intrinsic properties of the helicoidal structure.

Place, publisher, year, edition, pages
Optical Society of America, 2015
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-111944 (URN)10.1364/OE.23.001951 (DOI)000349688800025 ()
Available from: 2014-11-11 Created: 2014-11-11 Last updated: 2017-12-05Bibliographically approved
7. Sum regression decomposition of spectral and angle-resolved Mueller-matrices from biological reflectors
Open this publication in new window or tab >>Sum regression decomposition of spectral and angle-resolved Mueller-matrices from biological reflectors
Show others...
2016 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 55, no 15, 4060-4065 p.Article in journal (Refereed) Published
Abstract [en]

In this report we present studies on beetles of the Scarabaeidae family. The selected beetles show brilliant colors and in addition interesting polarization features. Mueller matrices of such beetles are of large interest to explore for biomimetics and for the understanding of the biological relevance of the observed polarization phenomena. Several species of the Scarabaeidae family have been studied by Hodgkinson, Goldstein  and our group to mention some. Ellipticity, degree of polarization and other derived parameters have been reported and Arwin et al. also did optical modeling to determine structural parameters of the scutellum part of the exoskeleton of Cetonia aurata. Mueller matrices are very rich in information about the sample properties and can also be analyzed by addressing depolarization. Cloude showed that a depolarizing Mueller matrix can be represented by a sum of up to four non-depolarizing Mueller matrices weighted by the eigenvalues of the covariance matrix of the Mueller matrix. These eigenvalues are all positive for a physically realizable Mueller matrix and this, so called sum decomposition can be used to filter matrices and obtain a measure of experimental fidelity. The result of the decomposition can also be used to describe a Mueller matrix as a set of basic optical elements having direct physical meaning, such as polarizers and retarders. Pioneering work on decomposition of Mueller-matrix images, including studies of beetles, was performed by Ossikovski et al. We have also previously demonstrated this with Cloude as well as regression decomposition of Mueller matrix spectra and images measured at near-normal incidence on C. aurata. Using Cloude decomposition we found that the experimentally determined Mueller matrix of C. aurata decomposes into a set of a mirror and a circular polarizer. Those results were then the basis for a more stable regression decomposition where the result was confirmed.

Place, publisher, year, edition, pages
Optical Society of America, 2016
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-111946 (URN)10.1364/AO.55.004060 (DOI)000376382300022 ()
Note

Funding agencies:  Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO Mat LiU) [2009 00971]; Vetenskapsradet (VR) [621-2011-4283]; Knut och Alice Wallenbergs Stiftelse [2004.0233]; Carl Tryggers

Vid tiden för disputation förelåg publikationen endast som manuskript

Available from: 2014-11-11 Created: 2014-11-11 Last updated: 2017-12-05Bibliographically approved

Open Access in DiVA

Mueller matrix ellipsometry studies of nanostructured materials(15479 kB)968 downloads
File information
File name FULLTEXT01.pdfFile size 15479 kBChecksum SHA-512
2d51b0164b5126e2011e8d92a921ea40958aacd1307fb7b310b6b61cd43f188b65dc68e6d55656b4549cf906003bd083a6c8770b4c5e32102d2733aebde785cf
Type fulltextMimetype application/pdf
omslag(2753 kB)35 downloads
File information
File name COVER01.pdfFile size 2753 kBChecksum SHA-512
2a3e70ff7f3938a9b487832244136a2e343d71a97ee779948d36bfcb38e5b403ebf3b3adf0bb2f39303d1a4cb87607583efb35be45050ee822e0b6dae78e3625
Type coverMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Magnusson, Roger

Search in DiVA

By author/editor
Magnusson, Roger
By organisation
Applied Optics The Institute of Technology
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 970 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 1626 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf