Dynamic Spectral Modulation Enabled by Conductive Polymer-Integrated Plasmonic Nanodisk-Hole Arrays

Rui Li; Yuzhang Liang; Haonan Wei; Hui Zhang; Svetlana Kurilkina; Wei Peng

doi:10.1021/acsami.3c10853

Dynamic Spectral Modulation Enabled by Conductive Polymer-Integrated Plasmonic Nanodisk-Hole Arrays

ACS Appl Mater Interfaces. 2023 Dec 4. doi: 10.1021/acsami.3c10853. Online ahead of print.

Authors

Rui Li¹, Yuzhang Liang^{1

2}, Haonan Wei¹, Hui Zhang³, Svetlana Kurilkina^{4

5}, Wei Peng^{1

2}

Affiliations

¹ School of Physics, Dalian University of Technology, Dalian 116024, China.
² DUT-BSU Joint Institute, Dalian University of Technology, Dalian 116024, China.
³ College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China.
⁴ Belarusian State University, Minsk 220030, Belarus.
⁵ B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk 220072, Belarus.

PMID: 38047552
DOI: 10.1021/acsami.3c10853

Abstract

The electrically driven optical performance modulation of the plasmonic nanostructure by conductive polymers provides a prospective technology for miniaturized and integrated active optoelectronic devices. These features of wafer-scale and flexible preparation, a wide spectrum adjustment range, and excellent electric cycling stability are critical to the practical applications of dynamic plasmonic components. Herein, we have demonstrated a large-scale and flexible active plasmonic nanostructure constructed by electrochemically synthesizing nanometric-thickness conductive polymer onto spatially mismatched Au nanodisk-hole (AuND-H) array on the poly(ethylene terephthalate) (PET) substrate, offering low-power electrically driven switching of reflective light in a wide wavelength range of 550-850 nm. The composite structure of the polymer/AuND-H array supports multiple plasmonic resonance modes with strong near-field enhancement and confinement, which provides an excellent dynamic spectral modulation platform. As a result, the PPy/AuND-H array achieves 18.4% reversible switching of spectral intensity at 780 nm and speedy response time, as well as maintains a stable dynamic modulation range at two-potential cycling between -0.6 and 0.1 V after 200 modulation cycles. Compared to the case of the PPy/AuND-H array, the PANI/AuND-H array obtains a more extensive intensity modulation of 25.1% at 750 nm, which is attributed to the significant differences in the extinction coefficient between the oxidized and reduced states of PANI, but its modulation range degrades apparently after 20 cycles driven at applied voltages between -0.1 and 0.8 V. Additionally, the cycling stability could be further improved by reducing the modulation voltage range. Our proposed electromodulated composite structure provides a promising technological proposal for dynamically plasmonic reconfigurable devices.

Keywords: active optoelectronic device; conductive polymers; dynamic modulation; electrical switching; plasmonic nanostructures; resonance coupling.