Electrical Tuning of Plasmonic Conducting Polymer Nanoantennas. Issue 13 (17th February 2022)

• Record Type: Journal Article
• Authors: Karki, Akchheta; Cincotti, Giancarlo; Chen, Shangzhi; Stanishev, Vallery; Darakchieva, Vanya; Wang, Chuanfei; Fahlman, Mats; Jonsson, Magnus P.
• Is Part Of: Advanced materials. Volume 34:Issue 13(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-17
• Subjects: conducting polymers -- dynamic plasmonic nanoantennas -- electrical tuning -- tunable metasurfaces; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202107172
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Nanostructures of conventional metals offer manipulation of light at the nanoscale but are largely limited to static behavior due to fixed material properties. To develop the next frontier of dynamic nano‐optics and metasurfaces, this study utilizes the redox‐tunable optical properties of conducting polymers, as recently shown to be capable of sustaining plasmons in their most conducting oxidized state. Electrically tunable conducting polymer nano‐optical antennas are presented, using nanodisks of poly(3, 4‐ethylenedioxythiophene:sulfate) (PEDOT:Sulf) as a model system. In addition to repeated on/off switching of the polymeric nanoantennas, the concept enables gradual electrical tuning of the nano‐optical response, which was found to be related to the modulation of both density and mobility of the mobile polaronic charge carriers in the polymer. The resonance position of the PEDOT:Sulf nanoantennas can be conveniently controlled by disk size, here reported down to a wavelength of around 1270 nm. The presented concept may be used for electrically tunable metasurfaces, with tunable farfield as well as nearfield. The work thereby opens for applications ranging from tunable flat meta‐optics to adaptable smart windows. Abstract : Electrically tunable conducting poly(3, 4‐ethylenedioxythiophene:sulfate) polymer nano‐optical antennas are reported. In addition to repeated on/off switching of the polymeric nanoantennas, gradual electrical tuning of their nano‐optical response is demonstrated. This work opens for electrically tunable metasurfaces and takes important steps toward applications ranging from tunable flat metalenses and holograms to adaptable smart windows.