Fluorescence excitation by enhanced plasmon upconversion under continuous wave illumination

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Taşgın M. E., Salakhutdinov I., Kendziora D., Abak M. K., Turkpence D., Piantanida L., ...Daha Fazla

PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS, cilt.21, ss.32-43, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.photonics.2016.06.001
  • Dergi Adı: PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.32-43
  • Anahtar Kelimeler: Plasmons, Second harmonic generation, Fano resonances, Enhancement, 2ND-HARMONIC GENERATION, INDUCED TRANSPARENCY, 2-PHOTON EXCITATION, GOLD NANOPARTICLES, FANO RESONANCES, SURFACES, SPECTRA, SYSTEMS, EYFP
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We demonstrate effective background-free continuous wave nonlinear optical excitation of molecules that are sandwiched between asymmetrically constructed plasmonic gold nanoparticle clusters. We observe that near infrared photons are converted to visible photons through efficient plasmonic second harmonic generation. Our theoretical model and simulations demonstrate that Fano resonances may be responsible for being able to observe nonlinear conversion using a continuous wave light source. We show that nonlinearity enhancement of plasmonic nanostructures via coupled quantum mechanical oscillators such as molecules can be several orders larger as compared to their classical counterparts. (C) 2016 Elsevier B.V. All rights reserved.