Fig. 3. PL characteristics of individual (6,5) SWNTs with E₁₁*⁻ defects.

a PL spectrum of a single (6,5) SWNT functionalized with 2-iodoaniline embedded in a polystyrene matrix at room temperature (298 K) collected under continuous wave excitation at the E₁₁ transition. b Second-order photon-correlation function g⁽²⁾(t) of E₁₁*⁻ emission at room temperature, confirming high single-photon purity (93%). c PL time trace showing a count rate fluctuation near the shot-noise limit. The deviation of the PL intensity distribution of the emitter (${\sigma }_{\mathrm{QE}}$) from the Poisson distribution of the detector shot noise (${\sigma }_{\mathrm{SN}}$) is expressed as ${\sigma }_{\mathrm{QE}}/{\sigma }_{\mathrm{SN}}={\left(\left(⟨{\mathrm{n}}^2⟩-⟨{\mathrm{n}⟩}^2\right)/⟨n⟩\right)}^{0.5}$, with n being the number of PL counts within a 0.1 s timeframe. d PL spectra of 12 individual (6,5) SWNTs functionalized with 2-iodoaniline and embedded in a polystyrene matrix recorded at 4 K. The spectral ranges of the E₁₁ (blue) and E₁₁*⁻ (red) emission peaks are highlighted.