Figure 1: Device characterization.
From: Gate-controlled generation of optical pulse trains using individual carbon nanotubes
(a) Schematic of a device. (b) Electron micrograph of a device. (c) PL excitation map of a nanotube in a device measured in (d–g). (d) Reflectivity image taken with λex=761 nm. (e) PL image of the same area as d. (f) PL spectra as a function of gate voltage, taken at P=1 μW. (g) Gate voltage dependence of IPL. The slight offset of the peak from 0 V is likely caused by water adsorption35. In b,d,e, scale bars are 1 μm. (c–e) are taken with P=20 μW and (e–g) are taken at λex=790 nm. The spectral integration window for IPL is from λem=1,275 to 1,325 nm.
