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23 May 2018 Plasmon generation through electron tunneling in graphene (Conference Presentation)
Sandra de Vega, F. Javier García de Abajo
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Proceedings Volume 10672, Nanophotonics VII; 106721Q (2018) https://doi.org/10.1117/12.2309974
Event: SPIE Photonics Europe, 2018, Strasbourg, France
Abstract
The short wavelength of graphene plasmons relative to the light wavelength makes them attractive for applications in optoelectronics and sensing. However, this property limits their coupling to external light and our ability to create and detect them. More efficient ways of generating plasmons are therefore desirable. Here we demonstrate through realistic theoretical simulations that graphene plasmons can be efficiently excited via electron tunneling in a sandwich structure formed by two graphene monolayers separated by a few atomic layers of hBN. We predict plasmon generation rates of ~ 10^12 - 10^14 1/s over an area of the squared plasmon wavelength for realistic values of the spacing and bias voltage, while the yield (plasmons per tunneled electron) has unity order [1]. Our results support electrical excitation of graphene plasmons in tunneling devices as a viable mechanism for the development of optics-free ultrathin plasmonic devices. [1] S. de Vega and F. J. García de Abajo, ACS. Phot. 4 (2017)
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Sandra de Vega and F. Javier García de Abajo "Plasmon generation through electron tunneling in graphene (Conference Presentation)", Proc. SPIE 10672, Nanophotonics VII, 106721Q (23 May 2018); https://doi.org/10.1117/12.2309974
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KEYWORDS
Plasmons
Graphene
Optoelectronics
Plasmonics
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