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Miniaturized spectrometers with a tunable van der Waals junction
Hoon Hahn Yoon1,2, Henry A Fernandez1,2, Fedor Nigmatulin1,2
1Department of Electronics and Nanoengineering, Aalto University, Espoo 02150, Finland.
Science (New York, N.Y.)
|October 20, 2022
Summary
Researchers developed a miniaturized computational spectrometer using a single van der Waals junction. This device achieves high accuracy, resolution, and broad bandwidth for spectral imaging applications.
Area of Science:
- Optoelectronics
- Spectroscopy
- Materials Science
Background:
- Miniaturized spectrometers are crucial for on-chip and implantable devices.
- Single-detector systems offer reduced footprint and high spectral resolution.
- Existing technologies face limitations in accuracy, resolution, and bandwidth.
Purpose of the Study:
- To develop a high-performance miniaturized computational spectrometer.
- To achieve ultraminiaturization for on-chip and implantable applications.
- To enhance spectral measurement accuracy, resolution, and operational bandwidth.
Main Methods:
- Utilized a single van der Waals junction with an electrically tunable response.
- Employed computational reconstruction algorithms with device spectral responses.
- Demonstrated proof-of-concept spectral imaging capabilities.
Main Results:
- Achieved high peak wavelength accuracy of ~0.36 nanometers.
- Obtained high spectral resolution of ~3 nanometers.
- Covered a broad operation bandwidth from ~405 to 845 nanometers.
Conclusions:
- The developed van der Waals junction computational spectrometer offers unprecedented performance.
- This approach enables ultraminiaturization for advanced spectral measurement.
- The technology paves the way for next-generation on-chip and implantable spectrometers.
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