A Spatiotemporal Tunable Filter Array Chip for Video-Rate Hyperspectral Imaging

Nano Letters, Journal Year: 2025, Volume and Issue: 25(9), P. 3455 - 3463

Published: Feb. 3, 2025

Existing miniaturized spectral imagers have mutual restrictions among spatial, temporal, and resolutions, making them inadequate to meet practical needs. Here, we demonstrate a spatiotemporal filter array chip tackle the trade-off three resolutions for hyperspectral imaging. A 2 × Fabry-Perot is embedded inside tunable liquid crystal modulator, increasing number of filtering channels spatiotemporally in hardware, which empowers imager with high simultaneously. The transmission type advantages easy fabrication large modulation. Experimental results show proposed has resolution around 0.5 nm visible range, frame rate 60 Hz spatial up 25 lp/mm without postinterpolation. gives best balanced performance imaging terms resolutions.

Language: Английский

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Scalable on-chip diffractive speckle spectrometer with high spectral channel density

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: March 20, 2025

Abstract The chip-scale integrated spectrometers are opening new avenues for a much wider range of applications than their conventional benchtop counterparts. While spectral reconstruction should be in command both resolution and bandwidth, large number channels is among the key goals spectrometer design. However, chip footprint eventually limits channel capacities well-established spectral-to-spatial mapping structures like dispersive elements, filter arrays, random media, so on. Here we suggest an alternative scheme by encoding information using on-chip diffractive metasurfaces. in-plane metasurface capable producing intensity speckles to resolve spectra. richness greatly increased scaling architecture via three layers cascaded readout realized two-dimensional imaging grating-diffracted pattern, enabling matrix spectrum reconstruction. has 70 pm over bandwidth 100 nm. Up 1400 were obtained within compact area only 150 μm × 950 μm. benchmark density up 10021 ch/mm 2 , which compares favorably against other state-of-art waveguide structures.

Language: Английский

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Smart Dust for Chemical Mapping

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

This review article explores the transformative potential of smart dust systems by examining how existing chemical sensing technologies can be adapted and advanced to realize their full capabilities. Smart dust, characterized submillimeter-scale autonomous platforms, offers unparalleled opportunities for real-time, spatiotemporal mapping across diverse environments. introduces technological advancements underpinning these systems, critically evaluates current limitations, outlines new avenues development. Key challenges, including multi-compound detection, system control, environmental impact, cost, are discussed alongside solutions. By leveraging innovations in miniaturization, wireless communication, AI-driven data analysis, sustainable materials, this highlights promise address critical challenges monitoring, healthcare, agriculture, defense sectors. Through lens, provides a strategic roadmap advancing from concept practical application, emphasizing its role transforming understanding management complex systems.

Language: Английский

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Conducting Polymer‐Based Electrochemically Tunable Filters with Spatiotemporal Spectral Tunability

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

Abstract Optical filters are key components to achieve spatial or temporal modulators for constructing computational miniaturized spectrometers. Conducting polymer‐based electrochemically tunable with spatiotemporal spectral tunability reported, demonstrating the advantages of angle‐independence, diverse modulation, high repeatability, and flexibility. By controlling chemical doping polyaniline solutions films, modulation is achieved in wavelength range 350–1100 nm. To encoding, an filter developed using a three‐electrode vertical device (ITO/PAni/Electrolyte (Ag/AgCl)/PEDOT/ITO), which exhibits continuous spectra repeatability during 100 cycles test. lateral incorporating three different conducting polymers (Cu/Electrolyte (ITO‐PAni+PPy+PEDOT‐OH)/Cu), show gradient extensive diversity. Using device, hyperspectral imaging system 640 × 512 pixel resolution constructed, can distinguish quantum dot emission wavelengths 10 Combining compressed sensing‐based reconstruction algorithm, spectrometer ≈1 nm further theoretically demonstrated. In summary, polymer provides advanced light smart optics.

Language: Английский

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Progress in 2D Material‐Based Infrared Photodetectors for Intelligent Vision Applications

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Abstract Infrared (IR) photodetectors based on narrow‐bandgap 2D materials and heterojunctions have shown great promise in constructing IR sensing systems, including optical communication, security monitoring, thermal imaging, astronomy exploration. In recent years, significant progress has been made developing performance enhancement strategies for material‐based integrating them with artificial neural networks, paving the way sophisticated intelligent applications. This review offers a detailed overview of advancements enhancing photodetection capabilities fostering related First, concise underlying mechanisms key metrics designed operation region is illustrated. Next, sensitivity light absorption photodetectors, defect engineering, heterostructure construction, field enhancement, are discussed. Then, advances applications summarized, particular focus innovations that enable intelligent, real‐time processing Finally, highlights challenges provides forward‐looking perspective development advanced photodetectors.

Language: Английский

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Multifunctional Light Emitters for Theranostics

Engineering materials, Journal Year: 2025, Volume and Issue: unknown, P. 297 - 329

Published: Jan. 1, 2025

Language: Английский

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Full‐Color Pixel with Only a Single Perovskite Photodiode

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

Abstract Photodetectors typically provide only 1D information about light intensity. Even the most basic color sensing requires external optical components, such as integrated filters. This limitation of richness has been overcome in recent years at cost spatial inefficiencies multidetector integration designs or challenges precisely controlling situ modulation single‐detector designs. Acquiring high‐dimensional with a single photodetector without integration, remains significant challenge that is aimed to resolve this work. Due differences carrier excitation by photons varying energies, simultaneous introduction both electronic and ionic photoconductivity mechanisms enables spectral characteristics unknown exciting be embedded within impedance features device. By extracting spectra using machine learning‐based reconstruction, full‐color pixel achieved for first time just photodetector.

Language: Английский

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Miniaturized spectroscopy and AI-driven probes in food industry automation

Food Research International, Journal Year: 2025, Volume and Issue: unknown, P. 116646 - 116646

Published: May 1, 2025

Language: Английский

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