Bai Ping, Gu Ming-Xia, Wei Xing-Chang, Li Er-Ping
Advanced Photonics and Plasmonics Group, A*STAR Institute of High Performance Computing, Singapore.
Opt Express. 2009 Dec 21;17(26):24349-57. doi: 10.1364/OE.17.024349.
A novel structure is proposed to electrically detect the plasmonic waves from a subwavelength plasmonic waveguide. By locating two L-shaped metallic nanorods in close proximity of each other at the end of the plasmonic waveguide, a metal-semiconductor-metal plasmonic detector is constructed. The L-shaped nanorods also form a dipole nanoantenna and a nanocavity to focus the photonic power into the active volume of the detector. The dimensions and locations of the L-shaped nanorods are studied to maximize the transmission efficiency of the photonic power from the plasmonic waveguide to the detector. Impedance matching with a sub is investigated to further improve the power transmission. Possible leads of the detector are discussed and their effects are investigated. Proposed detector has an ultra-compact and easy-to-fabricate planar structure, and a potentially THz speed, high responsivity as well as low power dissipation.
提出了一种新颖的结构，用于电检测来自亚波长等离子体波导的等离子体波。通过在等离子体波导的末端将两个L形金属纳米棒彼此紧密放置，构建了一个金属-半导体-金属等离子体探测器。L形纳米棒还形成了一个偶极纳米天线和一个纳米腔，以将光子功率聚焦到探测器的有源体积中。研究了L形纳米棒的尺寸和位置，以最大化从等离子体波导到探测器的光子功率传输效率。研究了与一个子电路的阻抗匹配，以进一步提高功率传输。讨论了探测器可能的引线，并研究了它们的影响。所提出的探测器具有超紧凑且易于制造的平面结构，以及潜在的太赫兹速度、高响应度和低功耗。
