Fig. 1. Optimized route for complex refractive index assignment method

Fig. 2. Relationship curves between polarizability and wavelength of nascent soot

Fig. 3. Effect of colorimetric thermometry based on empirical formula optimization of complex refractive index assignment

Fig. 4. Difference between real part and imaginary part before and after optimization of complex refractive index assignment by empirical formula

Fig. 5. Measurement errors before and after colorimetric thermometry results optimized by empirical formula for complex refractive index assignment

Fig. 6. Verification of interpolation formula between complex refractive index and optical band gap

Fig. 7. Effect of colorimetric thermometry based on experimental values optimization of complex refractive index assignment

Fig. 8. Measurement errors before and after colorimetric thermometry results optimized by experimental values for complex refractive index assignment

Fig. 9. Difference in real part and imaginary part of complex refractive index of nanoscale soot relative to mature soot (experimental value optimization methods)