太赫兹辐射
等离子体子
光电子学
石墨烯
材料科学
探测器
光电探测器
光学
纳米技术
物理
作者
José M. Caridad,Óscar Castelló,Sofía M. López Baptista,Takashi Taniguchi,Kenji Watanabe,Hartmut G. Roskos,Juan A. Delgado‐Notario
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-01-02
卷期号:24 (3): 935-942
被引量:7
标识
DOI:10.1021/acs.nanolett.3c04300
摘要
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.
科研通智能强力驱动
Strongly Powered by AbleSci AI