Algorithm-based spectrometer exploiting colloidal PbS quantum dots

In this work we report on a light analysis system based on narrowband colloidal PbS quantum dot photodetectors. The proposed system is able to identify both the peak wavelength of a quasi-monochromatic radiation and the emission spectrum of an arbitrary light source, in the visible and near infrared spectral range, starting from photocurrent measurements of several photoconductive devices with different spectral responses. We demonstrate the feasibility of our approach, optimizing several system parameters and obtaining a mean error of 5 nm and a maximum resolution of 40 nm as regards the peak wavelength identification and the spectral reconstruction, respectively.

Automated summary

This light analysis system utilizes narrowband colloidal PbS quantum dot photodetectors to accurately identify the peak wavelength of quasi-monochromatic radiation and emission spectrum of arbitrary light sources. By optimizing system parameters, the system achieves a mean error of 5 nm and a maximum resolution of 40 nm for peak wavelength identification and spectral reconstruction.