Plasmonic-Resonant Bowtie Antenna for Carbon Nanotube Photodetectors

Figure 2

(a) A 3D geometry shows the relative position between the CNT photodetector and the bowtie antenna. The incident light with electric field polarized in the x direction propagates in the z direction. (b) Top view of the device, and parameters of the bowtie antenna: 𝐿=400 nm is the length of the antenna, 𝑔=30 nm is the gap of two pieces of the antenna, 𝑤=30 nm is the apex width, and θ is the tip angle. (c) Side view of the device, showing the CNT photodetector and bowtie antenna sandwiching the Si₃N₄ layer that has a thickness of 𝑡.

(a)

(b)

(c)