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Broadband miniaturized spectrometers with a van der Waals tunnel diode.

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Das, Susobhan 
Shafi, Abde Mayeen 
Wang, Lei 


Miniaturized spectrometers are of immense interest for various on-chip and implantable photonic and optoelectronic applications. State-of-the-art conventional spectrometer designs rely heavily on bulky dispersive components (such as gratings, photodetector arrays, and interferometric optics) to capture different input spectral components that increase their integration complexity. Here, we report a high-performance broadband spectrometer based on a simple and compact van der Waals heterostructure diode, leveraging a careful selection of active van der Waals materials- molybdenum disulfide and black phosphorus, their electrically tunable photoresponse, and advanced computational algorithms for spectral reconstruction. We achieve remarkably high peak wavelength accuracy of ~2 nanometers, and broad operation bandwidth spanning from ~500 to 1600 nanometers in a device with a ~ 30×20 μm2 footprint. This diode-based spectrometer scheme with broadband operation offers an attractive pathway for various applications, such as sensing, surveillance and spectral imaging.


Acknowledgements: The authors acknowledge the funding from the Academy of Finland (314810, 333982, 336144, 352780, 352930, and 353364), the Academy of Finland Flagship Program (320167, PREIN), the EU H2020-MSCA-RISE-872049 (IPN-Bio), Business Finland (AGATE), the Jane and Aatos Erkko foundation, the Technology Industries of Finland centennial foundation (Future Makers 2022), and ERC (834742,101082183). This research was conducted at the Micronova, Nanofabrication Centre of Aalto University.


5108 Quantum Physics, 40 Engineering, 51 Physical Sciences

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Nat Commun

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Springer Science and Business Media LLC
EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council) (834742)