Calculation of evanescent field interaction with metallic nanoparticles immobilized on the air holes of solid-core photonic crystal fiber

Alexander Raspopin, Hong Liang Cui, Henry Du

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

We report the calculation of the attenuation coefficient of a probing optical mode due to interaction with metallic nanoparticles randomly distributed in the air holes of a solid core photonic crystal fiber (PCF) for SERS-based sensing and detection. The approach employed is an approximation of the solid core PCF with conventional curricular fiber considering a similar total internal reflection mechanism for mode propagation and almost complete concentration of the mode flux in the core of PCF. Losses due to the absorption and radiative scattering of electromagnetic energy by nanoparticles are examined. The analysis demonstrates a critical dependence of the absorption losses approaching the resonant localized surface plasmon's excitation and very fast rise of radiative losses with the increase of nanoparticle size. The physics of proper integral Raman spectroscopy is also discussed.

Original languageEnglish
Article number60050F
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume6005
DOIs
StatePublished - 2005
EventPhotonic Crystals and Photonic Crystal Fibers for Sensing Applications - Boston, MA, United States
Duration: 24 Oct 200525 Oct 2005

Keywords

  • Evanescent field
  • Mode attenuation coefficient
  • Nanoparticles
  • PCF
  • Proper integral Raman spectroscopy
  • SERS

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