Imaging-based intelligent spectrometer on a plasmonic rainbow chip

Dylan Tua, Ruiying Liu, Wenhong Yang, Lyu Zhou, Haomin Song, Leslie Ying, Qiaoqiang Gan

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Compact, lightweight, and on-chip spectrometers are required to develop portable and handheld sensing and analysis applications. However, the performance of these miniaturized systems is usually much lower than their benchtop laboratory counterparts due to oversimplified optical architectures. Here, we develop a compact plasmonic “rainbow” chip for rapid, accurate dual-functional spectroscopic sensing that can surpass conventional portable spectrometers under selected conditions. The nanostructure consists of one-dimensional or two-dimensional graded metallic gratings. By using a single image obtained by an ordinary camera, this compact system can accurately and precisely determine the spectroscopic and polarimetric information of the illumination spectrum. Assisted by suitably trained deep learning algorithms, we demonstrate the characterization of optical rotatory dispersion of glucose solutions at two-peak and three-peak narrowband illumination across the visible spectrum using just a single image. This system holds the potential for integration with smartphones and lab-on-a-chip systems to develop applications for in situ analysis.
Original languageEnglish (US)
JournalNature Communications
Issue number1
StatePublished - Apr 5 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-04-10
Acknowledged KAUST grant number(s): BAS/1/1415-01-01, REI/1/5232-01-01
Acknowledgements: W.Y. and Q.G. are sponsored by the baseline of Physical Science Engineering Division, King Abdullah University of Science and Technology (BAS/1/1415-01-01) and the NTGC-AI program (REI/1/5232-01-01).

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • General Chemistry
  • General Physics and Astronomy


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