Ferroelectric Reconfigurable Homojunction Miniaturized Computational Spectrometers for Dynamic Spectral Sensing.
basic_science · Level V
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- Record sourced from PubMed, PMID 41504570.
- Also identified by DOI 10.1002/adma.202515132.
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Abstract
Miniaturized spectrometers are crucial for advancing compact, energy-efficient, and real-time spectral sensing systems. However, traditional spectrometer architectures are limited by mechanical components and efficiency, making it difficult to consistently shrink their size. Here, we report a miniaturized computational spectral sensing platform based on a ferroelectrically reconfigurable WSe<sub>2</sub> homojunction, achieving both high-resolution spectral reconstruction and dynamic spectral sensing. The device operates under a non-volatile, near-zero-power standby mode enabled by the retention property of ferroelectric polarization, ensuring energy-efficient monitoring without a continuous power supply. Event-driven triggers combined with computational reconstruction enable real-time spectral tracking with ∼32 µs response latency. This system shows broad spectral sensitivity (450 nm-950 nm) and the capability to detect dynamic spectral variations, validated via monitoring reflectance spectra of VO<sub>2</sub> film during phase transitions. This work reveals great potential for low-power, real-time spectral sensing, paving the way for on-site spectral analysis.