论文标题
HBN包含的，基于石墨烯的室温Terahertz接收器，高速和低噪音
HBN-encapsulated, graphene-based room-temperature terahertz receivers with high speed and low noise
论文作者
论文摘要
在广泛（0.5thz-10thz）频率范围内，未冷却的Terahertz（THz）光电探测器（PDS）表现出快速（PS）响应和高灵敏度（噪声等效功率（NEP）<$ nWHz^{ - 1/2} $），在高分辨率范围的应用中需要应用（0.5thz-10thz）的频率范围（0.5thz-10thz）频率范围是高分辨率的量子（量）。光学通信。但是，当前的接收器无法在灵敏度，速度，操作温度和频率范围之间提供所需的平衡。在这里，我们演示了一个未冷却的thz pd，结合了低（〜2000 $ k_ {b}μm^{ - 2} $）高迁移率的电子特异性（> 50000 $ cm^{2} v^{ - 1} s^{ - 1} s^{ - 1} $）hbn-indaged fort the hbn-indaped fort the in han-inda ford prof prof prof prof prof prof prof prof in y a anna fiffie y a a a a a a a a a a a a a a a a a a a a a a a a a a a a a THZ。 This produces a strong photo-thermoelectric conversion, which simultaneously leads to a combination of high sensitivity (NEP $\leq$ 160 $pWHz^{-1/2}$), fast response time ($\leq 3.3 ns$) and a four orders of magnitude dynamic range, making our devices the fastest, broadband, low noise, room temperature THz PD to date.
Uncooled Terahertz (THz) photodetectors (PDs) showing fast (ps) response and high sensitivity (noise equivalent power (NEP) < $nWHz^{-1/2}$) over a broad (0.5THz-10THz) frequency range are needed for applications in high-resolution spectroscopy (relative accuracy ~ $10^{-11}$), metrology, quantum information, security, imaging, optical communications. However, present THz receivers cannot provide the required balance between sensitivity, speed, operation temperature and frequency range. Here, we demonstrate an uncooled THz PD combining the low (~2000 $k_{B}μm^{-2}$) electronic specific heat of high mobility (> 50000 $cm^{2}V^{-1}s^{-1}$) hBN-encapsulated graphene with the asymmetric field-enhancement produced by a bow-tie antenna resonating at 3 THz. This produces a strong photo-thermoelectric conversion, which simultaneously leads to a combination of high sensitivity (NEP $\leq$ 160 $pWHz^{-1/2}$), fast response time ($\leq 3.3 ns$) and a four orders of magnitude dynamic range, making our devices the fastest, broadband, low noise, room temperature THz PD to date.
