Doped semiconducting polymer nanoantennas for tunable organic plasmonics
(2022) In Communications Materials 3(1).- Abstract
Optical nanoantennas are often based on plasmonic resonances in metal nanostructures, but their dynamic tunability is limited due to the fixed permittivity of conventional metals. Recently, we introduced PEDOT-based conducting polymers as an alternative materials platform for dynamic plasmonics and metasurfaces. Here, we expand dynamic organic plasmonic systems to a wider class of doped polythiophene-based semiconducting polymers. We present nanodisks of PBTTT semiconducting polymer doped with a dicationic salt, enabling a high doping level of around 0.8 charges per monomer, and demonstrate that they can be used as nanooptical antennas via redox-tunable plasmonic resonances. The resonances arise from the polymer being optically metallic... (More)
Optical nanoantennas are often based on plasmonic resonances in metal nanostructures, but their dynamic tunability is limited due to the fixed permittivity of conventional metals. Recently, we introduced PEDOT-based conducting polymers as an alternative materials platform for dynamic plasmonics and metasurfaces. Here, we expand dynamic organic plasmonic systems to a wider class of doped polythiophene-based semiconducting polymers. We present nanodisks of PBTTT semiconducting polymer doped with a dicationic salt, enabling a high doping level of around 0.8 charges per monomer, and demonstrate that they can be used as nanooptical antennas via redox-tunable plasmonic resonances. The resonances arise from the polymer being optically metallic in its doped state and dielectric in its non-conducting undoped state. The plasmonic resonances are controllable over a 1000 nm wavelength range by changing the dimensions of the nanodisks. Furthermore, the optical response of the nanoantennas can be reversibly tuned by modulating the doping level of the polymer. Simulations corroborate the experimental results and reveal the possibility to also modulate the optical nearfield response of the nanoantennas.
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- author
- Karki, Akchheta ; Yamashita, Yu ; Chen, Shangzhi ; Kurosawa, Tadanori ; Takeya, Jun ; Stanishev, Vallery ; Darakchieva, Vanya LU ; Watanabe, Shun and Jonsson, Magnus P.
- organization
- publishing date
- 2022-12
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Communications Materials
- volume
- 3
- issue
- 1
- article number
- 48
- publisher
- Springer Nature
- external identifiers
-
- scopus:85134230324
- DOI
- 10.1038/s43246-022-00268-w
- language
- English
- LU publication?
- yes
- id
- ebcfc963-a255-46f2-bd2e-841ab6f9bb8d
- date added to LUP
- 2022-09-23 14:47:41
- date last changed
- 2023-11-18 08:49:43
@article{ebcfc963-a255-46f2-bd2e-841ab6f9bb8d,
abstract = {{<p>Optical nanoantennas are often based on plasmonic resonances in metal nanostructures, but their dynamic tunability is limited due to the fixed permittivity of conventional metals. Recently, we introduced PEDOT-based conducting polymers as an alternative materials platform for dynamic plasmonics and metasurfaces. Here, we expand dynamic organic plasmonic systems to a wider class of doped polythiophene-based semiconducting polymers. We present nanodisks of PBTTT semiconducting polymer doped with a dicationic salt, enabling a high doping level of around 0.8 charges per monomer, and demonstrate that they can be used as nanooptical antennas via redox-tunable plasmonic resonances. The resonances arise from the polymer being optically metallic in its doped state and dielectric in its non-conducting undoped state. The plasmonic resonances are controllable over a 1000 nm wavelength range by changing the dimensions of the nanodisks. Furthermore, the optical response of the nanoantennas can be reversibly tuned by modulating the doping level of the polymer. Simulations corroborate the experimental results and reveal the possibility to also modulate the optical nearfield response of the nanoantennas.</p>}},
author = {{Karki, Akchheta and Yamashita, Yu and Chen, Shangzhi and Kurosawa, Tadanori and Takeya, Jun and Stanishev, Vallery and Darakchieva, Vanya and Watanabe, Shun and Jonsson, Magnus P.}},
language = {{eng}},
number = {{1}},
publisher = {{Springer Nature}},
series = {{Communications Materials}},
title = {{Doped semiconducting polymer nanoantennas for tunable organic plasmonics}},
url = {{http://dx.doi.org/10.1038/s43246-022-00268-w}},
doi = {{10.1038/s43246-022-00268-w}},
volume = {{3}},
year = {{2022}},
}