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Direct birefringence and transmission modulation via dynamic alignment of P3HT nanofibers in an advanced opto-fluidic component
KTH, School of Information and Communication Technology (ICT).
KTH, School of Information and Communication Technology (ICT).ORCID iD: 0000-0002-0728-6684
KTH, School of Information and Communication Technology (ICT).
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2017 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 7, no 1, 52-61 p.Article in journal (Refereed) Published
Abstract [en]

Poly-3-hexylthiophene (P3HT) nanofibers are semiconducting high-aspect ratio nanostructures with anisotropic absorption and birefringence properties found at different regions of the optical spectrum. In addition, P3HT nanofibers possess an ability to be aligned by an external electric field, while being dispersed in a liquid. In this manuscript we show that such collective ordering of nanofibers, similar to liquid crystal material, significantly changes the properties of transmitted light. With a specially fabricated opto-fluidic component, we monitored the phase and transmission modulation of light propagating through the solution of P3HT nanofibers, being placed in the electric field with strength up to 0.1 V/μm. This report describes a technique for light modulation, which can be implemented in optical fiber-based devices or on-chip integrated components.

Place, publisher, year, edition, pages
2017. Vol. 7, no 1, 52-61 p.
Keyword [en]
Absorption spectroscopy, Aspect ratio, Birefringence, Electric fields, Light modulation, Liquid crystals, Modulation, Nanofibers, Optical fiber fabrication, Optical fibers, Anisotropic absorption, Birefringence property, External electric field, Fiber-based device, High aspect ratio nano-structures, Liquid crystal materials, Poly-3-hexylthiophene, Transmission modulation, Light transmission
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:kth:diva-202242DOI: 10.1364/OME.7.000052ISI: 000392205600007Scopus ID: 2-s2.0-85008157720OAI: oai:DiVA.org:kth-202242DiVA: diva2:1082902
Note

Funding text: European Union (EU) project ICONE (Grant #608099); Swedish Research Council (VR-SRL 2012-4421, VR-SRL 2013-6780); Swedish Foundation for Strategic Research (SSF, Grant no EM11-0002). The authors acknowledge Prof. Walter Margulis for fruitful discussions regarding optical fiber components and for his assistance in improving the quality of the manuscript. QC 20170320

Available from: 2017-03-20 Created: 2017-03-20 Last updated: 2017-11-29Bibliographically approved

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Vasileva, ElenaÖstling, MikaelPopov, Sergei

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