The spectral region of midinfrared has proven its great potential in various fields, such as materials characterization, medical examination, security, and product inspection. However, the development of room-temperature sensitive midinfrared photodetectors is inevitably in strong demand. Graphene-based detectors are expected to potentially overcome many of the shortcomings of earlier detectors. Unfortunately, low light absorption originating from a single atomic layer is still an obstacle for sensitive sensing using graphene-based photodetectors. To optimize the performance of plasmonic antenna, we have proposed wideband bull’s-eye-shaped antennas using cavity-mode resonance for the midinfrared region. The proposed multi-resonant frequency plasmonic antennas are integrated with graphene-based detectors for midinfrared detection. We demonstrated that the graphene device integrated with the multifrequency plasmonic antenna enabled the room-temperature sensitive midinfrared detection. In addition, such a device can achieve frequency filtering measurement through the bull’s eye shaped plasmonic antenna. The coupling of antenna onto the device largely spares the integration space. We believe that such a device is practical in various applications that require room-temperature, frequency selective sensitive photo detection.

中文翻译：

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具有牛眼等离子体天线的石墨烯中红外光电探测器

中红外光谱区已证明其在材料表征、医学检查、安全和产品检测等各个领域的巨大潜力。然而，室温敏感中红外光电探测器的发展不可避免地受到强烈需求。基于石墨烯的探测器有望克服早期探测器的许多缺点。不幸的是，源自单个原子层的低光吸收仍然是使用基于石墨烯的光电探测器进行灵敏传感的障碍。为了优化等离子体天线的性能，我们提出了针对中红外区域使用腔模谐振的宽带牛眼形天线。所提出的多谐振频率等离子体天线与基于石墨烯的探测器集成，用于中红外探测。我们证明了与多频等离子体天线集成的石墨烯器件能够实现室温敏感的中红外检测。此外，此类装置还可以通过牛眼形等离子体天线实现频率滤波测量。将天线耦合到设备上很大程度上节省了集成空间。我们相信这种设备在需要室温、频率选择性敏感光检测的各种应用中是实用的。