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Article

Hybrid Electro-Optical Pumping of Active Plasmonic Nanostructures

Laboratory of Nanooptics and Plasmonics, Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia
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Nanomaterials 2020, 10(5), 856; https://doi.org/10.3390/nano10050856
Received: 12 April 2020 / Revised: 25 April 2020 / Accepted: 26 April 2020 / Published: 29 April 2020
(This article belongs to the Special Issue Plasmonics and Nano-Optics from UV to THz: Materials and Applications)
Surface plasmon polaritons (SPPs) offer a unique opportunity to overcome the diffraction limit of light. However, this opportunity comes at the cost of the strong absorption of the SPP field in a metal, which unavoidably limits the SPP propagation length to a few tens of micrometers in nanostructures with deep-subwavelength mode confinement. The only possibility to avoid the propagation losses is to compensate for them by optical gain in the adjacent active medium. Different approaches for surface plasmon amplification by stimulated emission of radiation have been proposed based on either optical or electrical pumping. However, each has its own disadvantages caused by the selected type of pumping scheme. Here, we study, for the first time, hybrid electro-optical pumping of active plasmonic waveguide structures, and by using comprehensive self-consistent numerical simulations, demonstrate that this hybrid approach can outperform both pure electrical pumping and pure optical pumping. The SPP modal gain is higher than under pure optical pumping, while one can precisely and locally adjust it by tuning the electric current, which allows the reduction of amplification noise and provides additional functionalities. We believe that our findings lay a solid foundation for the development of a new generation of active plasmonic devices and stimulate further research in this area. View Full-Text
Keywords: active plasmonics; surface plasmon amplification; optical pumping; electrical pumping; Schottky barrier diode; plasmonic amplifier; metal-semiconductor structures active plasmonics; surface plasmon amplification; optical pumping; electrical pumping; Schottky barrier diode; plasmonic amplifier; metal-semiconductor structures
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MDPI and ACS Style

Vyshnevyy, A.A.; Fedyanin, D.Y. Hybrid Electro-Optical Pumping of Active Plasmonic Nanostructures. Nanomaterials 2020, 10, 856. https://doi.org/10.3390/nano10050856

AMA Style

Vyshnevyy AA, Fedyanin DY. Hybrid Electro-Optical Pumping of Active Plasmonic Nanostructures. Nanomaterials. 2020; 10(5):856. https://doi.org/10.3390/nano10050856

Chicago/Turabian Style

Vyshnevyy, Andrey A., and Dmitry Y. Fedyanin 2020. "Hybrid Electro-Optical Pumping of Active Plasmonic Nanostructures" Nanomaterials 10, no. 5: 856. https://doi.org/10.3390/nano10050856

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