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Bragg reflection from periodic helicoidal media with laterally graded refractive index
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-9229-2028
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-2749-8008
2017 (English)In: Optical materials (Amsterdam), ISSN 0925-3467, E-ISSN 1873-1252, Vol. 72, p. 334-340Article in journal (Refereed) Published
Abstract [en]

Light interaction with a columnar structure of InxAl1-xN where each column is a layered periodic helical medium with laterally graded refractive index is considered. It is demonstrated that such a columnar structure can be presented as a stack of layers with a gradient of the refractive index. To calculate reflectance in the proposed model, the 2 x 2 characteristic matrix method adopted for a gradient index medium was applied. The influence of the refractive indices (including absorption), parameters of the twisting, and thickness of the periodic structure on reflectance is studied. Cases of normal and oblique incident light are considered. The presented medium is a one-dimensional photonic crystal that can be utilized in many devices for light manipulation. (C) 2017 Published by Elsevier B.V.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2017. Vol. 72, p. 334-340
Keywords [en]
Bragg reflector; Selective reflection; Photonic crystals; Periodic media; Helicoidal media; Nanorods
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Identifiers
URN: urn:nbn:se:liu:diva-142990DOI: 10.1016/j.optmat.2017.06.018ISI: 000413880500051OAI: oai:DiVA.org:liu-142990DiVA, id: diva2:1156536
Note

Funding Agencies|Swedish Research Council Formas [2009-1425]; Swedish Energy Agency [42476-1]

Available from: 2017-11-13 Created: 2017-11-13 Last updated: 2017-12-20

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The full text will be freely available from 2019-06-22 10:44
Available from 2019-06-22 10:44

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Valyukh, SergiyArwin, HansBirch, JensJärrendahl, Kenneth
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