Optical properties of bio-inspired peptide nanotubes

Amir Handelman, Boris Apter, Gil Rosenman

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Supramolecular self-assembled bio-inspired peptide nanostructures are favorable to be implemented in diverse nanophotonics applications due to their superior physical properties such as wideband optical transparency, high second-order nonlinear response, waveguiding properties and more. Here, we focus on the optical properties found in di-phenylalanine peptide nano-architectures, with special emphasize on their linear and nonlinear optical waveguiding effects. Using both simulation and experiments, we show their ability to passively guide light at both fundamental and second-harmonic frequencies. In addition, we show that at elevated temperatures, 140-180°C, these native supramolecular structures undergo irreversible thermally induced transformation via re-assembling into completely new thermodynamically stable phase having nanofiber morphology similar to those of amyloid fibrils. In this new phase, the peptide nanofibers lose their second-order nonlinear response, while exhibit profound modification of optoelectronic properties followed by the appearance of visible (blue and green) photoluminescence (PL). Our study propose a new generation of multifunctional optical waveguides with variety of characteristics, which self-assembled into 1D-elongated nanostructures and could be used as building blocks of many integrated photonic devices.

Original languageEnglish
Title of host publicationOrganic Photonics VII
EditorsJean-Charles Ribierre, David Cheyns, Volker van Elsbergen, Pierre M. Beaujuge
PublisherSPIE
ISBN (Electronic)9781510601406
DOIs
StatePublished - 2016
EventOrganic Photonics VII - Brussels, Belgium
Duration: 4 Apr 20165 Apr 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9895
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOrganic Photonics VII
Country/TerritoryBelgium
CityBrussels
Period4/04/165/04/16

Keywords

  • Bioinspired peptide nanotubes
  • intrinsic visible fluorescence
  • linear and nonlinear waveguiding
  • second harmonic generation

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