Photon-triggered nanowire transistors
Photon-triggered nanowire transistors
复制标题
DOI：
10.1038/nnano.2017.153
复制
发表时间：
2017-10-01
影响因子：
38.3
通讯作者：
Park, Hong-Gyu
中科院分区：
文献类型：
--
作者：
Kim, Jungkil;Lee, Hoo-Cheol;Park, Hong-Gyu
光子触发的电子电路一直是光子学的长期目标。最近的演示包括光子控制其他光子（1,2）的同种异晶体管，或通过光子调整或增强的栅极响应的光晶体管（3-5）。但是，只有少数研究报告了电子电流在没有电气门的情况下进行光学切换和放大的设备。在这里，我们显示了光子触发的纳米线（NW）晶体管，光子触发的NW逻辑门和单个NW光电检测系统。 NW与长硅（PSI）段连接的长晶硅（CSI）段合成。在制造的设备中，NW两端的电触点连接到中间的一个PSI段。将PSI段暴露在光线中，会触发NW中的电流，高/OFF较高/OFF比率> 8 x 10（6）。可以使用两个独立的光学输入信号触发沿NW的两个PSI段的设备。使用局部泵激光器，我们演示了光子触发的逻辑门，包括和或NAND门。单个100 nm PSI段的直径为25 nm的光子触发的西北晶体管需要小于300 PW的功率。此外，我们利用了高光敏性并制造了亚微米分辨率光检测系统。光子触发的晶体管为多功能设备应用提供了一个新的场所，例如可编程逻辑元素和超敏光探测器。
Photon-triggered electronic circuits have been a long-standing goal of photonics. Recent demonstrations include either alloptical transistors in which photons control other photons(1,2) or phototransistors with the gate response tuned or enhanced by photons(3-5). However, only a few studies report on devices in which electronic currents are optically switched and amplified without an electrical gate. Here we show photon-triggered nanowire (NW) transistors, photon-triggered NW logic gates and a single NW photodetection system. NWs are synthesized with long crystalline silicon (CSi) segments connected by short porous silicon (PSi) segments. In a fabricated device, the electrical contacts on both ends of the NW are connected to a single PSi segment in the middle. Exposing the PSi segment to light triggers a current in the NW with a high on/off ratio of >8 x 10(6). A device that contains two PSi segments along the NW can be triggered using two independent optical input signals. Using localized pump lasers, we demonstrate photon-triggered logic gates including AND, OR and NAND gates. A photon-triggered NW transistor of diameter 25 nm with a single 100 nm PSi segment requires less than 300 pW of power. Furthermore, we take advantage of the high photosensitivity and fabricate a submicrometre-resolution photodetection system. Photon-triggered transistors offer a new venue towards multifunctional device applications such as programmable logic elements and ultrasensitive photodetectors.