Strong Plasmon–Exciton Coupling in Ag Nanoparticle—Conjugated Polymer Core-Shell Hybrid Nanostructures
1
Femtosecond Spectroscopy Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
2
Department of Materials Science and Engineering, Rutgers University, 607 Taylor Rd., Piscataway, NJ 08854, USA
3
Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Rd., Piscataway, NJ 08854, USA
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(9), 2141; https://doi.org/10.3390/polym12092141
Received: 21 August 2020
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Revised: 15 September 2020
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Accepted: 15 September 2020
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Published: 19 September 2020
(This article belongs to the Special Issue Polymeric Materials for Optical Applications II)
Strong plasmon–exciton coupling between tightly-bound excitons in organic molecular semiconductors and surface plasmons in metal nanostructures has been studied extensively for a number of technical applications, including low-threshold lasing and room-temperature Bose-Einstein condensates. Typically, excitons with narrow resonances, such as J-aggregates, are employed to achieve strong plasmon–exciton coupling. However, J-aggregates have limited applications for optoelectronic devices compared with organic conjugated polymers. Here, using numerical and analytical calculations, we demonstrate that strong plasmon–exciton coupling can be achieved for Ag-conjugated polymer core-shell nanostructures, despite the broad spectral linewidth of conjugated polymers. We show that strong plasmon–exciton coupling can be achieved through the use of thick shells, large oscillator strengths, and multiple vibronic resonances characteristic of typical conjugated polymers, and that Rabi splitting energies of over 1000 meV can be obtained using realistic material dispersive relative permittivity parameters. The results presented herein give insight into the mechanisms of plasmon–exciton coupling when broadband excitonic materials featuring strong vibrational–electronic coupling are employed and are relevant to organic optoelectronic devices and hybrid metal–organic photonic nanostructures.
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Keywords:
conjugated polymer; exciton; plasmon; vibrationally-dressed; strong coupling; electromagnetic simulations
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MDPI and ACS Style
Petoukhoff, C.E.; Dani, K.M.; O’Carroll, D.M. Strong Plasmon–Exciton Coupling in Ag Nanoparticle—Conjugated Polymer Core-Shell Hybrid Nanostructures. Polymers 2020, 12, 2141. https://doi.org/10.3390/polym12092141
AMA Style
Petoukhoff CE, Dani KM, O’Carroll DM. Strong Plasmon–Exciton Coupling in Ag Nanoparticle—Conjugated Polymer Core-Shell Hybrid Nanostructures. Polymers. 2020; 12(9):2141. https://doi.org/10.3390/polym12092141
Chicago/Turabian StylePetoukhoff, Christopher E., Keshav M. Dani, and Deirdre M. O’Carroll. 2020. "Strong Plasmon–Exciton Coupling in Ag Nanoparticle—Conjugated Polymer Core-Shell Hybrid Nanostructures" Polymers 12, no. 9: 2141. https://doi.org/10.3390/polym12092141
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