An inversely designed integrated spectrometer with reconfigurable performance and ultra-low power consumption

Opto-Electronic Advances, Journal Year: 2024, Volume and Issue: 7(8), P. 240099 - 240099

Published: Jan. 1, 2024

Despite the pressing demand for integrated spectrometers, a solution that deliver high-performance while being practically operated is still missing. Furthermore, current spectrometers lack reconfigurability in their performance, which highly desirable dynamic working scenarios. This study presents viable by demonstrating user-friendly, reconfigurable spectrometer on silicon. At core of this innovative programmable photonic circuit capable exhibiting diverse spectral responses, can be significantly adjusted using on-chip phase shifters. The distinguishing feature our lies its inverse design approach, facilitating effortless control and efficient manipulation circuit. By eliminating need intricate configuration, reduces power consumption mitigates complexity. Additionally, offers two distinct operating conditions. In Ultra-High-Performance mode, it activated multiple phase-shifters achieves exceptional resolution picometer scale maintaining broad bandwidth. On other hand, Ease-of-Use mode further simplifies logic actuating single-phase shifter. Although provides slightly degraded approximately 0.3 nm, prioritizes ease use well-suited applications where ultra-fine reconstruction not primary requirement.

Language: Английский

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Durable and programmable ultrafast nanophotonic matrix of spectral pixels

Nature Nanotechnology, Journal Year: 2024, Volume and Issue: 19(11), P. 1635 - 1643

Published: Aug. 12, 2024

Abstract Locally addressable nanophotonic devices are essential for modern applications such as light detection, optical imaging, beam steering and displays. Despite recent advances, a versatile solution with high-speed tuning rate, long-life durability programmability across multiple pixels remains elusive. Here we introduce programmable matrix consisting of vanadium dioxide (VO 2 ) cavities on pixelated microheaters that meets all these requirements. The indirect Joule heating VO can result in pronounced spectral modulation colour changes ensures exceptional endurance even after million switching cycles. Precise control over the thermal dissipation power through SiO layer an optimized thickness Si facilitates ultrafast rate exceeding 70 kHz. We demonstrated video-rate display by electrically addressing 12 × pixels. Furthermore, inspired unique pixel-level intermediate states pixels, spatiotemporal concept is introduced spectrum detection.

Language: Английский

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Monolithic thin-film lithium niobate broadband spectrometer with one nanometre resolution

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 14, 2024

Abstract Miniaturised optical spectrometers are attractive due to their small footprint, low weight, robustness and stability even in harsh environments such as space or industrial facilities. We report on a stationary-wave integrated Fourier-transform spectrometer featuring measured bandwidth of 325 nm theoretical spectral resolution 1.2 nm. fabricate test lithium niobate-on-insulator take full advantage the platform, namely electro-optic modulation, broad transparency range loss achieved thanks matured fabrication techniques. use effect develop innovative layouts overcome undersampling limitations improve resolution, thus providing framework enhance performance all devices sharing same working principle. With our work, we add another important element portfolio lithium-niobate can be combined with multiple other building blocks realise functional, monolithic compact photonic circuits.

Language: Английский

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Single‐Shot on‐Chip Diffractive Speckle Spectrometer with High Spectral Channel Density

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 30, 2025

Abstract The research on chip‐scale spectrometers is driven by the growing demand for miniaturized and integrated spectral sensors. performance trade‐off between resolution bandwidth one of primary challenges community. While substantial progress has been made toward a vast number channels to overcome this issue, they either relied sophisticated tuning mechanisms or required huge chip areas. In work, single‐shot spectrometer demonstrated based all passive on‐chip diffractive metasurfaces which able create speckle pattern with richness information. By scaling structure three layers metasurfaces, resolved from can be significantly increased due cascaded diffraction behaviors. device fabricated via standard silicon photonic foundry CMOS compatible process. A measured 47 pm achieved across 40 nm, yielding up 851 within compact footprint 150 µm × 300 µm. corresponding channel density reaches 18911 ch mm −2 . It provides possible means develop beyond resolution‐bandwidth limit.

Language: Английский

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Fabrication of diamond transmission gratings for EUV-SXR applications using femtosecond laser

Diamond and Related Materials, Journal Year: 2025, Volume and Issue: unknown, P. 112084 - 112084

Published: Feb. 1, 2025

Language: Английский

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Organic photodiodes: device engineering and applications

Frontiers of Optoelectronics, Journal Year: 2022, Volume and Issue: 15(1)

Published: Dec. 1, 2022

Abstract Organic photodiodes (OPDs) have shown great promise for potential applications in optical imaging, sensing, and communication due to their wide-range tunable photoelectrical properties, low-temperature facile processes, excellent mechanical flexibility. Extensive research work has been carried out on exploring materials, device structures, physical mechanisms, processing approaches improve the performance of OPDs level inorganic counterparts. In addition, various system prototypes built based exhibited attractive features OPDs. It is vital link optimal design engineering requirements examine existing deficiencies towards practical applications, so this review starts from discussions required key metrics different envisioned applications. Then fundamentals OPD structures operation mechanisms are briefly introduced, latest development improving merits reviewed. Finally, trials including wearable medical diagnostics, imagers, spectrometers, light communications reviewed, both promises challenges revealed. Graphical

Language: Английский

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Scalable On‐Chip Microdisk Resonator Spectrometer

Laser & Photonics Review, Journal Year: 2023, Volume and Issue: 17(5)

Published: Jan. 31, 2023

Abstract On‐chip micro‐spectrometers are sought after with great effort owing to extensive potential applications in mobile optical sensing and imaging. By multiplexing more physical channels, the reconstructive spectrometers based on spectral‐to‐spatial mapping technique can improve spectral range. However, this method is challenging implement sustain due increase system complexity decrease of dynamic range or resolution. Here, a micro‐spectrometer utilizing single tunable microdisk resonator (MDR) demonstrated. Such MDR spectrometer has only one channel receive all components compact size, overcoming trade‐off among resolution, range, Leveraging wavelength temperature‐dependent response matrix, unknown spectra reconstructed from their corresponding output light intensity vector. The fabricated device illustrates high resolution 0.01 nm for dual peak medium 0.2 20 A wide variety complex input spectra, including narrowband broadband signals, be well recovered, exhibiting robustness reconstruction approach. Moreover, proposed exhibits ease scalability flexible configuration array covering set desired even discrete ranges.

Language: Английский

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Integrated Single-Resonator Spectrometer beyond the Free-Spectral-Range Limit

ACS Photonics, Journal Year: 2023, Volume and Issue: 10(3), P. 654 - 666

Published: Jan. 25, 2023

The chip-scale miniaturization of optical spectrometers may enable many potential applications, such as wearable health monitoring, field deployable biochemical sensing, dense hyperspectral imaging, and portable coherence tomography. However, the widespread use integrated is hampered by an inherent trade-off between resolutions bandwidths. Here, a ground-breaking design strategy proposed to overcome bottleneck. most noteworthy finding in this work that, simultaneously leveraging temporal spatial decorrelations, single micro-ring resonator (MRR) can serve spectrometer with ultra-high-resolution across ultrabroad bandwidth far exceeding narrow free spectral range (FSR). structure based on tunable MRR that supports TE0 TE1 transverse modes. When tuning MRR, unknown spectrum scanned dual-mode resonances synchronized manner. recorded signal formed "splicing" responses TE1. Due intermodal dispersion, all wavelength channels transmission matrix are sufficiently decorrelated beyond FSR limit cross-referring two halves; thus, any arbitrary spectra be retrieved solving linear inverse problem preconditioned iterative optimizations. Experimental results demonstrate ultrahigh resolution <80 pm working >100 nm, which yields ultralarge-wavelength channel capacity 1250. device footprint also compact 20 × 35 μm2. These represent smallest-resolution-footprint product (≈0.056 pm·mm2), highest bandwidth-to-footprint ratio (≈0.14 nm μm–2), channel-to-footprint (≈1.79 μm–2) ever demonstrated.

Language: Английский

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Miniature computational spectrometer with a plasmonic nanoparticles-in-cavity microfilter array

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: May 7, 2024

Optical spectrometers are essential tools for analysing light‒matter interactions, but conventional can be complicated and bulky. Recently, efforts have been made to develop miniaturized spectrometers. However, it is challenging overcome the trade-off between miniaturizing size retaining performance. Here, we present a complementary metal oxide semiconductor image sensor-based miniature computational spectrometer using plasmonic nanoparticles-in-cavity microfilter array. Size-controlled silver nanoparticles directly printed into cavity-length-varying Fabry‒Pérot microcavities, which leverage strong coupling localized surface plasmon resonance of microcavity regulate transmission spectra realize large-scale arrayed spectrum-disparate microfilters. Supported by machine learning-based training process, uses artificial intelligence was demonstrated measure visible-light at subnanometre resolution. The high scalability technological approaches shown here may facilitate development high-performance optical extensive applications.

Language: Английский

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A wideband, high-resolution vector spectrum analyzer for integrated photonics

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: April 8, 2024

Abstract The analysis of optical spectra—emission or absorption—has been arguably the most powerful approach for discovering and understanding matter. invention development many kinds spectrometers have equipped us with versatile yet ultra-sensitive diagnostic tools trace gas detection, isotope analysis, resolving hyperfine structures atoms molecules. With proliferating data information, urgent demanding requirements placed today on spectrum ever-increasing spectral bandwidth frequency resolution. These are especially stringent broadband laser sources that carry massive information dispersive devices used in processing systems. In addition, analyzers expected to probe device’s phase response where extra is encoded. Here we demonstrate a novel vector analyzer (VSA) capable characterizing passive active one setup. Such dual-mode VSA can measure loss, response, dispersion properties devices. It also coherently map into RF domain. features 55.1 THz (1260–1640 nm), resolution 471 kHz, dynamic range 56 dB. Meanwhile, our fiber-based compact robust. requires neither high-speed modulators photodetectors nor any feedback control. Finally, employ applications including characterization integrated waveguides, mapping comb spectra, coherent light detection ranging (LiDAR). Our presents an innovative device spectroscopy, play critical role future photonic systems sensing, communication, imaging, quantum processing.

Language: Английский

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