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Room Temperature Graphene Mid-Infrared Bolometer with a Broad Operational Wavelength Range
ACS Photonics ( IF 6.5 ) Pub Date : 2020-03-30 , DOI: 10.1021/acsphotonics.0c00028 Shaofan Yuan 1 , Renwen Yu 2 , Chao Ma 1 , Bingchen Deng 1 , Qiushi Guo 1 , Xiaolong Chen 1 , Cheng Li 1 , Chen Chen 1 , Kenji Watanabe 3 , Takashi Taniguchi 3 , F. Javier García de Abajo 2, 4 , Fengnian Xia 1
ACS Photonics ( IF 6.5 ) Pub Date : 2020-03-30 , DOI: 10.1021/acsphotonics.0c00028 Shaofan Yuan 1 , Renwen Yu 2 , Chao Ma 1 , Bingchen Deng 1 , Qiushi Guo 1 , Xiaolong Chen 1 , Cheng Li 1 , Chen Chen 1 , Kenji Watanabe 3 , Takashi Taniguchi 3 , F. Javier García de Abajo 2, 4 , Fengnian Xia 1
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The past decade has witnessed the realization of numerous different types of graphene photodetectors with a strong focus on the visible and near-infrared spectral range, in which various high-performance photodetectors exist based on traditional materials such as silicon and III–V compound semiconductors. However, high-speed mid-infrared photodetection at room temperature is still an unsolved challenge, despite its importance in applications such as security, sensing, and imaging. Here we address this challenge by demonstrating that high-quality graphene is an ideal high-speed bolometric material for the less-explored yet critical mid-infrared photodetection at room temperature, due to its broadband absorption, small heat capacity, and remarkably large temperature coefficient of resistance (TCR) of up to around 1% per Kelvin, which is comparable to that of commercial bolometric materials. We demonstrate a device based on graphene encapsulated in hexagonal boron nitride (hBN) exhibiting decent extrinsic responsivities of 5.1–1.4 mA/W in the 3.4–12 μm wavelength range at room temperature, and further predict a detection bandwidth of at least 47 MHz. Our demonstration lays the foundations for graphene high-speed mid-infrared technologies.
中文翻译：
具有宽工作波长范围的室温石墨烯中红外测温仪
在过去的十年中，目睹了许多不同类型的石墨烯光电探测器的实现，重点关注可见光和近红外光谱范围，其中存在基于传统材料（例如硅和III–V化合物半导体）的各种高性能光电探测器。然而，尽管在诸如安全性，感测和成像等应用中具有重要意义，但在室温下进行高速中红外光电检测仍然是一项尚未解决的挑战。在这里，我们通过证明高质量的石墨烯是理想的高速辐射热分析材料，因为它具有宽带吸收，小的热容量和非常大的温度系数，因此在室温下对于较少探索的但至关重要的中红外光检测是一种理想的高速辐射热分析材料每个开尔文的电阻（TCR）高达1％左右，与商业辐射热分析材料相当。我们演示了一种基于石墨烯的器件，该器件封装在六方氮化硼（hBN）中，在室温下在3.4-12μm波长范围内表现出5.1-1.4 mA / W的体面非固有响应，并进一步预测了至少47 MHz的检测带宽。我们的演示为石墨烯高速中红外技术奠定了基础。
更新日期：2020-03-30
中文翻译：
具有宽工作波长范围的室温石墨烯中红外测温仪
在过去的十年中，目睹了许多不同类型的石墨烯光电探测器的实现，重点关注可见光和近红外光谱范围，其中存在基于传统材料（例如硅和III–V化合物半导体）的各种高性能光电探测器。然而，尽管在诸如安全性，感测和成像等应用中具有重要意义，但在室温下进行高速中红外光电检测仍然是一项尚未解决的挑战。在这里，我们通过证明高质量的石墨烯是理想的高速辐射热分析材料，因为它具有宽带吸收，小的热容量和非常大的温度系数，因此在室温下对于较少探索的但至关重要的中红外光检测是一种理想的高速辐射热分析材料每个开尔文的电阻（TCR）高达1％左右，与商业辐射热分析材料相当。我们演示了一种基于石墨烯的器件，该器件封装在六方氮化硼（hBN）中，在室温下在3.4-12μm波长范围内表现出5.1-1.4 mA / W的体面非固有响应，并进一步预测了至少47 MHz的检测带宽。我们的演示为石墨烯高速中红外技术奠定了基础。
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