Broadband miniaturized spectrometers with a van der Waals tunnel diode

Md Gius Uddin, Susobhan Das, Abde Mayeen Shafi, Lei Wang, Xiaoqi Cui, Fedor Nigmatulin, Faisal Ahmed, Andreas C. Liapis, Weiwei Cai, Zongyin Yang, Harri Lipsanen, Tawfique Hasan, Hoon Hahn Yoon and Zhipei Sun ()
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Md Gius Uddin: Aalto University
Susobhan Das: Aalto University
Abde Mayeen Shafi: Aalto University
Lei Wang: Shanghai Jiao Tong University
Xiaoqi Cui: Aalto University
Fedor Nigmatulin: Aalto University
Faisal Ahmed: Aalto University
Andreas C. Liapis: Aalto University
Weiwei Cai: Shanghai Jiao Tong University
Zongyin Yang: Zhejiang University
Harri Lipsanen: Aalto University
Tawfique Hasan: University of Cambridge
Hoon Hahn Yoon: Aalto University
Zhipei Sun: Aalto University

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract 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.

Date: 2024
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DOI: 10.1038/s41467-024-44702-8

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