Asgari Mahdi, Viti Leonardo, Zannier Valentina, Sorba Lucia, Vitiello Miriam Serena
NEST, CNR-Istituto Nanoscienze and Scuola Normale Superiore, Piazza San Silvestro 12, 56127 Pisa, Italy.
Nanomaterials (Basel). 2021 Dec 13;11(12):3378. doi: 10.3390/nano11123378.
Engineering detection dynamics in nanoscale receivers that operate in the far infrared (frequencies in the range 0.1-10 THz) is a challenging task that, however, can open intriguing perspectives for targeted applications in quantum science, biomedicine, space science, tomography, security, process and quality control. Here, we exploited InAs nanowires (NWs) to engineer antenna-coupled THz photodetectors that operated as efficient bolometers or photo thermoelectric receivers at room temperature. We controlled the core detection mechanism by design, through the different architectures of an on-chip resonant antenna, or dynamically, by varying the NW carrier density through electrostatic gating. Noise equivalent powers as low as 670 pWHz with 1 µs response time at 2.8 THz were reached.
在远红外（频率范围为0.1 - 10太赫兹）运行的纳米级接收器中设计检测动力学是一项具有挑战性的任务，然而，这可以为量子科学、生物医学、空间科学、断层扫描、安全、过程和质量控制等目标应用开辟引人入胜的前景。在这里，我们利用砷化铟纳米线（NWs）设计了天线耦合太赫兹光电探测器，该探测器在室温下作为高效测辐射热计或光热接收器运行。我们通过设计片上谐振天线的不同架构来控制核心检测机制，或者通过静电门控改变NW载流子密度来动态控制。在2.8太赫兹时，响应时间为1微秒，噪声等效功率低至670皮瓦/赫兹。
