Resonant Dyakonov-Shur Magnetoplasmons in Graphene Terahertz Photodetectors
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arXiv
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| Natura: | Preprint |
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2025
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| author | Delgado-Notario, Juan A. Bray, Cedric Perez-Martin, Elsa Benhamou-Bui, Ben Saha, Namrata Parvez, Sahil Consejo, Christophe. Sigu, Guillaume Benlemqwanssa, Salah Bonnet, Laurent Taniguchi, Takashi Watanabe, Kenji Caridad, José M. Krishtopenko, Sergey S. Meziani, Yahya M. Jouault, Benoit Torres, Jérémie Ruffenach, Sandra Teppe, Frédéric |
| author_facet | Delgado-Notario, Juan A. Bray, Cedric Perez-Martin, Elsa Benhamou-Bui, Ben Saha, Namrata Parvez, Sahil Consejo, Christophe. Sigu, Guillaume Benlemqwanssa, Salah Bonnet, Laurent Taniguchi, Takashi Watanabe, Kenji Caridad, José M. Krishtopenko, Sergey S. Meziani, Yahya M. Jouault, Benoit Torres, Jérémie Ruffenach, Sandra Teppe, Frédéric |
| contents | Graphene plasmons confine incident terahertz fields far below the diffraction limit and, when hosted by a gate-defined Fabry-Perot cavity, enable electrically tunable, frequency-selective photodetectors. In a magnetic field, these plasmons hybridize with the cyclotron motion to form magnetoplasmons, offering a platform for fundamental studies and for nonreciprocal, spectrally selective, ultrasensitive terahertz photonics. However, implementing magnetoplasmon-assisted resonant transistors at terahertz frequencies has remained challenging so far. Here we use gate-dependent, on-chip terahertz photocurrent spectroscopy combined with a perpendicular magnetic field to resolve and probe the evolution of resonant magnetoplasmons in antenna-coupled monolayer and bilayer graphene TeraFETs. In monolayer graphene the dispersion reflects the Dirac nature of the carriers, exhibiting a non-monotonic density dependence due to the interplay of plasma resonance and cyclotron motion, with an inflection point at maximal plasmon-cyclotron coupling. In contrast, in bilayer graphene we recover and map a magnetoplasmon dispersion consistent with the conventional Schrödinger-type picture. These results establish graphene TeraFET devices as a robust on-chip platform for resonant magnetoplasmonics at terahertz frequencies, enabling magnetically programmable, frequency-selective photonics and opening avenues toward photodetectors with enhanced sensitivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_00180 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Resonant Dyakonov-Shur Magnetoplasmons in Graphene Terahertz Photodetectors Delgado-Notario, Juan A. Bray, Cedric Perez-Martin, Elsa Benhamou-Bui, Ben Saha, Namrata Parvez, Sahil Consejo, Christophe. Sigu, Guillaume Benlemqwanssa, Salah Bonnet, Laurent Taniguchi, Takashi Watanabe, Kenji Caridad, José M. Krishtopenko, Sergey S. Meziani, Yahya M. Jouault, Benoit Torres, Jérémie Ruffenach, Sandra Teppe, Frédéric Mesoscale and Nanoscale Physics Graphene plasmons confine incident terahertz fields far below the diffraction limit and, when hosted by a gate-defined Fabry-Perot cavity, enable electrically tunable, frequency-selective photodetectors. In a magnetic field, these plasmons hybridize with the cyclotron motion to form magnetoplasmons, offering a platform for fundamental studies and for nonreciprocal, spectrally selective, ultrasensitive terahertz photonics. However, implementing magnetoplasmon-assisted resonant transistors at terahertz frequencies has remained challenging so far. Here we use gate-dependent, on-chip terahertz photocurrent spectroscopy combined with a perpendicular magnetic field to resolve and probe the evolution of resonant magnetoplasmons in antenna-coupled monolayer and bilayer graphene TeraFETs. In monolayer graphene the dispersion reflects the Dirac nature of the carriers, exhibiting a non-monotonic density dependence due to the interplay of plasma resonance and cyclotron motion, with an inflection point at maximal plasmon-cyclotron coupling. In contrast, in bilayer graphene we recover and map a magnetoplasmon dispersion consistent with the conventional Schrödinger-type picture. These results establish graphene TeraFET devices as a robust on-chip platform for resonant magnetoplasmonics at terahertz frequencies, enabling magnetically programmable, frequency-selective photonics and opening avenues toward photodetectors with enhanced sensitivity. |
| title | Resonant Dyakonov-Shur Magnetoplasmons in Graphene Terahertz Photodetectors |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2512.00180 |