Dr. Chunyuan Song Profile

Dr. Chunyuan Song

at Nanjing Univ of Posts and Telecommunications

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Proceedings Article | 10 January 2018 Paper

Visible-infrared micro-spectrometer based on a preaggregated silver nanoparticle monolayer film and an infrared sensor card

Tao Yang, Jing-xiao Peng, Ho-pui Ho, Chun-yuan Song, Xiao-li Huang, Yong-yuan Zhu, Xing-ao Li, Wei Huang

Proceedings Volume 10616, 1061610 (2018) https://doi.org/10.1117/12.2292789

KEYWORDS: Nanoparticles, Reconstruction algorithms, Infrared spectroscopy

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By using a preaggregated silver nanoparticle monolayer film and an infrared sensor card, we demonstrate a miniature spectrometer design that covers a broad wavelength range from visible to infrared with high spectral resolution. The spectral contents of an incident probe beam are reconstructed by solving a matrix equation with a smoothing simulated annealing algorithm. The proposed spectrometer offers significant advantages over current instruments that are based on Fourier transform and grating dispersion, in terms of size, resolution, spectral range, cost and reliability. The spectrometer contains three components, which are used for dispersion, frequency conversion and detection. Disordered silver nanoparticles in dispersion component reduce the fabrication complexity. An infrared sensor card in the conversion component broaden the operational spectral range of the system into visible and infrared bands. Since the CCD used in the detection component provides very large number of intensity measurements, one can reconstruct the final spectrum with high resolution. An additional feature of our algorithm for solving the matrix equation, which is suitable for reconstructing both broadband and narrowband signals, we have adopted a smoothing step based on a simulated annealing algorithm. This algorithm improve the accuracy of the spectral reconstruction.

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