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Stark Effect Control of the Scattering Properties of Plasmonic Nanogaps Containing an Organic Semiconductor

Pagnotto, Donatello; Muravitskaya, Alina; Benoit, David M; Bouillard, Jean-Sebastien G; Adawi, Ali M


Donatello Pagnotto

Alina Muravitskaya

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Dr David Benoit
Senior Lecturer in Molecular Physics and Astrochemistry


The development of actively tunable plas-monic nanostructures enables real-time reconfigurable and on demand enhancement of optical signals. This is an essential requirement for a wide range of applications such as sensing and nanophotonic devices, for which electrically driven tunability is required. By modifying the transition energies of a material via the application of an electric field, the Stark effect offers a reliable and practical approach to achieve such tunability. In this work, we report on the use of the Stark effect to control the scattering response of a plasmonic nanogap formed between a silver nanoparticle and an extended silver film separated by a thin layer of the organic semiconductor PQT-12. The plasmonic response of such nano-scattering sources follows the quadratic stark shift. Additionally, our approach allows to experimentally determine the polarizability of the semiconductor material embedded in the nanogap region, offering a new approach to probe the excitonic properties of extremely thin semi-conducting materials such as 2D materials under applied external electric field with nanoscale resolution.


Pagnotto, D., Muravitskaya, A., Benoit, D. M., Bouillard, J. G., & Adawi, A. M. (2023). Stark Effect Control of the Scattering Properties of Plasmonic Nanogaps Containing an Organic Semiconductor. ACS Applied Optical Materials, 1(1), 500–506.

Journal Article Type Article
Acceptance Date Dec 5, 2022
Online Publication Date Dec 20, 2022
Publication Date 2023-01
Deposit Date Dec 15, 2022
Publicly Available Date Dec 21, 2022
Journal ACS Applied Optical Materials
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 1
Issue 1
Pages 500–506
Keywords Stark Effect; Plasmonic Nano-gap; Organic Semiconductor; FDTD; Molecular Polarizability; DFPT
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