Figure 3: Frequency-domain measurements.
From: Gate-controlled generation of optical pulse trains using individual carbon nanotubes
(a) Integrated PL as a function of f and P for a device with a (10,8) nanotube. Va=−Vb=3.0 V, and IPL is obtained by integrating the PL spectra from λem=1,400 to 1,450 nm. (b) Frequency dependence of integrated PL for P=0.4 μW (blue), P=0.8 μW (green) and P=1.6 μW (red). Circles are data and lines are fits. (c,d) Power dependence of f0 and I0, respectively. (e) Schematic showing a microscopic physical mechanism. Red open circles and blue filled circles represent holes and electrons, respectively. Short horizontal lines on the right side of the band diagrams indicate the Fermi level of the contact metal.
