Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Direct birefringence and transmission modulation via dynamic alignment of P3HT nanofibers in an advanced opto-fluidic component
KTH, Skolan för informations- och kommunikationsteknik (ICT).
KTH, Skolan för informations- och kommunikationsteknik (ICT).ORCID-id: 0000-0002-0728-6684
KTH, Skolan för informations- och kommunikationsteknik (ICT).
Visa övriga samt affilieringar
2017 (Engelska)Ingår i: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 7, nr 1, s. 52-61Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
2017. Vol. 7, nr 1, s. 52-61
Nyckelord [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
Nationell ämneskategori
Nanoteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-202242DOI: 10.1364/OME.7.000052ISI: 000392205600007Scopus ID: 2-s2.0-85008157720OAI: oai:DiVA.org:kth-202242DiVA, id: diva2:1082902
Anmärkning

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

Tillgänglig från: 2017-03-20 Skapad: 2017-03-20 Senast uppdaterad: 2017-12-29Bibliografiskt granskad
Ingår i avhandling
1. Electro-optical properties of one-dimensional organic crystals
Öppna denna publikation i ny flik eller fönster >>Electro-optical properties of one-dimensional organic crystals
2017 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The recent development of photonics and applications puts new challenges for systems using emission, transmission and modulation of light. For these reasons, novel optical materials attract a special interest for their enabling properties for novel technologies.

In this work, we performed the research on fundamental properties and the possibility of implementation of electro-optical response of Poly-3-hexylthiophene-2,5-diyl (P3HT) nanofibers, which belong to the class of organic semiconductor crystalline materials. Our research demonstrated that an external electric field allows controlling the orientation of nanofibers dispersed in a solution by changing the electrical properties of P3HT crystals. This method was used to introduce a collective alignment of P3HT nanofibers and to impact the optical properties of the colloid. The spectroscopic and polarization measurements show that P3HT nanofibers possess optical anisotropy in a wide range of visible spectrum. This property combined with the ability to manipulate the orientation of nanofibers dynamically, was used for direct phase and intensity modulation of transmitted light. Along with these investigations, several engineering and technology tasks were solved. We have designed the transverse electro-optical cell using all-optical-fiber approach, as well as the longitudinal electro-optical cell was fabricated using a novel polymer molding technique.

The obtained research results demonstrate the potential of P3HT crystalline nanofibers as a material class of large niche of applications, not only limited to photovoltaics but also being implemented in electro-optical systems to control light polarization and propagation.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2017. s. 55
Nationell ämneskategori
Nanoteknik
Forskningsämne
Fysik
Identifikatorer
urn:nbn:se:kth:diva-220529 (URN)
Disputation
2017-11-24, Sal C, Electrum, Stockholm, 10:00 (Engelska)
Handledare
Anmärkning

QC 20171229

Tillgänglig från: 2017-12-29 Skapad: 2017-12-22 Senast uppdaterad: 2018-01-18Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Personposter BETA

Vasileva, ElenaÖstling, MikaelPopov, Sergei

Sök vidare i DiVA

Av författaren/redaktören
Lobov, G. S.Marinins, A.Zhao, YichenVasileva, ElenaThylén, LarsWosinski, L.Östling, MikaelToprak, M. S.Popov, Sergei
Av organisationen
Skolan för informations- och kommunikationsteknik (ICT)Material- och nanofysikTeoretisk kemi och biologiBiomedicinsk fysik och röntgenfysikOptik och Fotonik, OFO
I samma tidskrift
Optical Materials Express
Nanoteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 475 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf