Miniaturized spectrometers with a tunable van der Waals junction

Hoon Hahn Yoon*, Henry A. Fernandez, Fedor Nigmatulin, Weiwei Cai, Zongyin Yang, Hanxiao Cui, Faisal Ahmed, Xiaoqi Cui, Md Gius Uddin, Ethan D. Minot, Harri Lipsanen, Kwanpyo Kim, Pertti Hakonen, Tawfique Hasan, Zhipei Sun*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

37 Citations (Scopus)
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Miniaturized computational spectrometers, which can obtain incident spectra using a combination of device spectral responses and reconstruction algorithms, are essential for on-chip and implantable applications. Highly sensitive spectral measurement using a single detector allows the footprints of such spectrometers to be scaled down while achieving spectral resolution approaching that of benchtop systems. We report a high-performance computational spectrometer based on a single van der Waals junction with an electrically tunable transport-mediated spectral response. We achieve high peak wavelength accuracy (similar to 0.36 nanometers), high spectral resolution (similar to 3 nanometers), broad operation bandwidth (from similar to 405 to 845 nanometers), and proof-of-concept spectral imaging. Our approach provides a route toward ultraminiaturization and offers unprecedented performance in accuracy, resolution, and operation bandwidth for single-detector computational spectrometers.

Original languageEnglish
Pages (from-to)396-399
Number of pages4
Issue number6617
Publication statusPublished - 21 Oct 2022
MoE publication typeA1 Journal article-refereed


  • Heterojunctions
  • Spectrometer
  • Spectroscopy
  • Optoelectronics
  • Photonics
  • 2D materials
  • Transition metal
  • Artificial intellegence
  • Intelligence
  • Reconstruction
  • Wavelength
  • Accuracy
  • Resolution
  • Bandwidth
  • Broadband
  • Monochromatic
  • Sensors
  • Detectors
  • Graphene
  • Hexagonal boron nitride
  • Photocurrent
  • Dark current
  • Photodetectors
  • Phototransistors
  • Photodiodes
  • Photovoltaic
  • Photogating
  • High performance
  • Imaging
  • Pixel
  • Pixel detector
  • Single junction
  • Ultimate
  • Algorithm
  • Computational
  • Miniaturization
  • Spectral imager
  • Spectral analysis
  • Integration
  • Scalability
  • Compatibility
  • Lab on a chip


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