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

Direct link
Electromechanically Tunable Carbon Nanofiber Photonic Crystal
Department of Applied Physics, Chalmers University of Technology, Göteborg, Sweden.
Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.ORCID iD: 0000-0002-6371-0638
Department of Applied Physics, Chalmers University of Technology, Göteborg, Sweden.
Show others and affiliations
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. Vol. 13, no 2, 397-401 p.
Keyword [en]
carbon nanofiber, nanoelectromechanics, diffraction, ellipsometry, form factor, tunable photonic crystal
National Category
Natural Sciences Nano Technology
URN: urn:nbn:se:liu:diva-86730DOI: 10.1021/nl3035527ISI: 000315079500012OAI: diva2:581328
Available from: 2012-12-31 Created: 2012-12-31 Last updated: 2015-09-22
In thesis
1. Mueller matrix ellipsometry studies of nanostructured materials
Open this publication in new window or tab >>Mueller matrix ellipsometry studies of nanostructured materials
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.
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1631
National Category
Physical Sciences
urn:nbn:se:liu:diva-111947 (URN)10.3384/diss.diva-111947 (DOI)978-91-7519-200-0 (print) (ISBN)
Public defence
2014-12-12, Planck, Fysikhuset, Campus Valla, Linköpings universitet, Linköping, 09:15 (English)
Available from: 2014-11-11 Created: 2014-11-11 Last updated: 2015-09-22Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Magnusson, RogerArwin, Hans
By organisation
Applied Optics The Institute of Technology
In the same journal
Nano letters (Print)
Natural SciencesNano Technology

Search outside of DiVA

GoogleGoogle Scholar
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

Altmetric score

Total: 77 hits
ReferencesLink to record
Permanent link

Direct link