Optical properties of hybrid plasmonic nanocomposits

Authors

  • Roman A. Dynich B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68-2 Niezaliežnasci Avenue, Minsk 220072, Belarus
  • Anatoly D. Zamkovets B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68-2 Niezaliežnasci Avenue, Minsk 220072, Belarus
  • Alina N. Ponyavina B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68-2 Niezaliežnasci Avenue, Minsk 220072, Belarus

Keywords:

organic semiconductor, absorption band, metal nanoparticle, surface plasmonic resonance of absorption, local field
Supporting Agencies
This work was partial financially supported by Belarusian Republican Foundation for Fundamental Research (grant No. Ф16В2-003).

Abstract

With the use of the Mie theory, the features of the local field distribution near Ag nanoparticles in transparent and absorptive media are analyzed. It is shown that the presence of absorption leads to changes in a picture of the «hot spots» distribution near the plasmon nanoparticle surface. The near-field effects on the spectral properties of planar hybrid nanostructures, where nanometer films of organic materials such as rhodamine 6G (R6G), nickel phthalocyanine (NiPc) or copper phthalocyanine (CuPc) contact with close-packed monolayers (island structures) of silver nanoparticles, are investigated. It has been found that effective absorption of organic films increases when located near the surface of island metallic nanostructures. It has been established that sensitivity of effective absorption of organic semiconductor thin films to the presence of Ag nanoparticles in the nanocomposites under study grows in line with the series R6G – NiPc – CuPc. The most considerable enhancement of effective absorption of organic films due to the presence of plasmonic nanoparticles is realized in the longer wavelength range with respect to band of the surface plasmon resonance (550 – 800 nm). The effect is dependent on the composite topology, being maximal when the organic film thickness is compareable with sizes of plasmonic nanoparticles.

Author Biographies

  • Roman A. Dynich, B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68-2 Niezaliežnasci Avenue, Minsk 220072, Belarus

    PhD (physics and mathematics); senior researcher at the laboratory of physics of infrared rays

  • Anatoly D. Zamkovets, B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68-2 Niezaliežnasci Avenue, Minsk 220072, Belarus

    PhD (physics and mathematics); senior researcher at the laboratory of physics of infrared rays

  • Alina N. Ponyavina, B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68-2 Niezaliežnasci Avenue, Minsk 220072, Belarus

    doctor of science (physics and mathematics), docent; chief researcher at the laboratory of physics of infrared rays

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Published

2019-02-03

Issue

No. 2 (2018): Journal of the Belarusian State University. Physics

Section

Physics of Nanostructures

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How to Cite

(1)
Dynich, R. A.; Zamkovets, A. D.; Ponyavina, A. N. Optical Properties of Hybrid Plasmonic Nanocomposits. Журнал Белорусского государственного университета. Физика 2019, No. 2, 25-34.