Room-Temperature Plasmon-Assisted Resonant THz Detection in Single-layer Graphene Transistors
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| author | Caridad, José M. Castelló, Óscar Baptista, Sofía M. López Taniguchi, Takashi Watanabe, Kenji Roskos, Hartmut G. Delgado-Notario, Juan A. |
| author_facet | Caridad, José M. Castelló, Óscar Baptista, Sofía M. López Taniguchi, Takashi Watanabe, Kenji Roskos, Hartmut G. Delgado-Notario, Juan A. |
| contents | Frequency-selective or even frequency-tunable Terahertz (THz) photodevices are critical components for many technological applications that require nanoscale manipulation, control and confinement of light. Within this context, gate-tunable phototransistors based on plasmonic resonances are often regarded as the most promising devices for frequency-selective detection of THz fields. The exploitation of constructive interference of plasma waves in such detectors not only promises frequency selectivity, but also a pronounced sensitivity enhancement at the target frequencies. However, clear signatures of plasmon-assisted resonances in THz detectors have been only revealed at cryogenic temperatures so far, and remain unobserved at application-relevant room-temperature conditions. In this work, we demonstrate the sought-after room-temperature resonant detection of THz radiation in short-channel gated photodetectors made from high-quality single-layer graphene. The survival of this intriguing resonant regime at room-temperature ultimately relies on the weak intrinsic electron-phonon scattering in graphene, which avoids the damping of the plasma oscillations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_04005 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Room-Temperature Plasmon-Assisted Resonant THz Detection in Single-layer Graphene Transistors Caridad, José M. Castelló, Óscar Baptista, Sofía M. López Taniguchi, Takashi Watanabe, Kenji Roskos, Hartmut G. Delgado-Notario, Juan A. Mesoscale and Nanoscale Physics Applied Physics Optics Frequency-selective or even frequency-tunable Terahertz (THz) photodevices are critical components for many technological applications that require nanoscale manipulation, control and confinement of light. Within this context, gate-tunable phototransistors based on plasmonic resonances are often regarded as the most promising devices for frequency-selective detection of THz fields. The exploitation of constructive interference of plasma waves in such detectors not only promises frequency selectivity, but also a pronounced sensitivity enhancement at the target frequencies. However, clear signatures of plasmon-assisted resonances in THz detectors have been only revealed at cryogenic temperatures so far, and remain unobserved at application-relevant room-temperature conditions. In this work, we demonstrate the sought-after room-temperature resonant detection of THz radiation in short-channel gated photodetectors made from high-quality single-layer graphene. The survival of this intriguing resonant regime at room-temperature ultimately relies on the weak intrinsic electron-phonon scattering in graphene, which avoids the damping of the plasma oscillations. |
| title | Room-Temperature Plasmon-Assisted Resonant THz Detection in Single-layer Graphene Transistors |
| topic | Mesoscale and Nanoscale Physics Applied Physics Optics |
| url | https://arxiv.org/abs/2401.04005 |