Figure 1

The carbon nanotube lamp. The four upper images from left to right are “before” (TEM), “backlight only” (optical), “backlight with nanotube” (optical), and “after”(TEM). The $4\mu \mathrm{m}\times 4\mu \mathrm{m}$ lower images are 4.7 V bias “nanotube only”, taken with bandpass filters centered at wavelengths 600–1100 nm (50 nm increments). The lamp is visible to the unaided eye. Higher resolution TEM images (not shown) indicate that the $1.4\mu \mathrm{m}$ long nanotube has 11 walls and an outer diameter of 13 nm.Reuse & Permissions

Figure 2

Composite overlay constructed from the 600 nm and post-heating TEM images shown separately in Fig. 1. The optical CCD pixels have effective linear dimension $\beta =127\mathrm{nm}$. Also shown are all 11 one standard-deviation intensity boundaries implied by 2D Gaussian fits to the “nanotube only” images of Fig. 1.Reuse & Permissions

Figure 3

The function $\frac{\lambda k_B}{hc}\ln \dot{S}(0,0)[{\mathrm{kK}}^{-1}]$ vs $P[\mu \mathrm{W}]$, for the 11 bandpass filters of central wavelengths $\lambda [\mathrm{nm}]$. The statistical uncertainties are smaller than the symbols designating the data in all cases. The upper abscissa gives $T_{\max }[\mathrm{K}]$ for the nanotube, assuming the global best fit values of $T_0$ and $\alpha$.Reuse & Permissions

Figure 4

Fit parameters $T_{\lambda }[\mathrm{K}]$, $\alpha [\mathrm{K}/300\mu \mathrm{W}]$, and $T_0[\mathrm{K}]$ found from the data of Fig. 3, indicated by ▲, ◆, and ■, respectively, and colored as previously according to $\lambda [\mathrm{nm}]$. $\alpha$’s display units have been chosen to allow this compact graphic. The weighed means, $T_0=406\pm 4\mathrm{K}$ and $\alpha =2.13\pm 0.04\mathrm{K}/\mu \mathrm{W}$, are indicated by horizontal lines showing the one-standard-deviation limits. Anticorrelation between the values found for $T_0$ and $\alpha$ is clearly evident. The variation in $T_{\lambda }$ is expected, and is largely dictated by decreasing source brightness and decreasing camera quantum efficiency at short and long wavelengths, respectively.Reuse & Permissions