Miniaturized spectral sensing with a tunable optoelectronic interface

• DOI: 10.1126/sciadv.ado6886
• Publication Date: 2025-01-22T18:58:39Z
• Authors: Xiaoqi Cui; Fedor Nigmatulin; Lei Wang; Igor Reduto; Andreas C. Liapis; Mingde Du; Md Gius Uddin; Shafi Abde Mayeen; Faisal Ahmed; Yi Zhang; Hoon Hahn Yoon; Harri Lipsanen; Seppo Honkanen; Timo Aalto; Zongyin Yang; Tawfique Hasan; Weiwei Cai; Zhipei Sun
• Keywords: Interface (matter)

Reconstructive optoelectronic spectroscopy has generated substantial interest in the miniaturization of traditional spectroscopic tools, such as spectrometers. However, most state-of-the-art demonstrations face fundamental limits rank deficiency photoresponse matrix. In this work, we demonstrate a miniaturized spectral sensing system using an electrically tunable compact interface, which generates distinguishable photoresponses from various input spectra, enabling accurate identification with device footprint 5 micrometers by micrometers. We report narrow-band peak accuracies ∼0.19 nanometers free space and ∼2.45 on-chip. addition, implement broadband complex for material identification, applicable to organic dyes, metals, semiconductors, dielectrics. This work advances high-performance, optical both free-space on-chip applications, offering cost-effective solutions, broad applicability, scalable manufacturing.