Electrical detection of plasmonic waves using an ultra-compact structure via a nanocavity.
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.
Bai
Ping
P
Advanced Photonics and Plasmonics Group, A*STAR Institute of High Performance Computing, Singapore. baiping@ihpc.a-star.edu.sg
Gu
Ming-Xia
MX
Wei
Xing-Chang
XC
Li
Er-Ping
EP
D017076:Computer-Aided Design; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008904:Miniaturization; D036103:Nanotechnology / Q000295:instrumentation*; D055096:Optical Devices; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*