Algorithm-based spectrometer exploiting colloidal PbS quantum dots
•Colloidal quantum dots allow the realization of spectra-selective photodetectors.•A Vis-NIR spectrometer was implemented starting from photocurrent measurements.•The system accuracy is related to the number of devices and spectrum features.•High tunability and adaptability of the quantum dot device...
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Published in | Photonics and nanostructures Vol. 43; p. 100861 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
01.02.2021
Elsevier Science Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | •Colloidal quantum dots allow the realization of spectra-selective photodetectors.•A Vis-NIR spectrometer was implemented starting from photocurrent measurements.•The system accuracy is related to the number of devices and spectrum features.•High tunability and adaptability of the quantum dot device-based spectrometer.
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. |
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ISSN: | 1569-4410 1569-4429 |
DOI: | 10.1016/j.photonics.2020.100861 |