Jixin Yang, Jun Shi, Weixia Hu, Miao Li, Shali Xiao, Ruize Wang, Qichao Luo
Based on the principles of Bragg diffraction and the Rowland circle geometry, we developed a novel, to the best of our knowledge, curved-crystal spectrometer featuring an exponentially shaped surface. This design facilitates high resolution and high photon collection efficiency over a broad energy range. Crucially, all image points for various X-ray energies lie precisely on the Rowland circle, and the lines connecting these image points to the source point are collinear. The spectrometer achieved a spectral resolution exceeding 18,000 in theoretical and simulation studies, which remained above 3,100 under experimental validation. This innovative and adaptable design offered promising potential for applications in plasma diagnostics and high-energy-density physics research.
{"title":"An exponential curved crystal: design and performance for high-resolution X-ray spectroscopy.","authors":"Jixin Yang, Jun Shi, Weixia Hu, Miao Li, Shali Xiao, Ruize Wang, Qichao Luo","doi":"10.1364/OL.579731","DOIUrl":"https://doi.org/10.1364/OL.579731","url":null,"abstract":"<p><p>Based on the principles of Bragg diffraction and the Rowland circle geometry, we developed a novel, to the best of our knowledge, curved-crystal spectrometer featuring an exponentially shaped surface. This design facilitates high resolution and high photon collection efficiency over a broad energy range. Crucially, all image points for various X-ray energies lie precisely on the Rowland circle, and the lines connecting these image points to the source point are collinear. The spectrometer achieved a spectral resolution exceeding 18,000 in theoretical and simulation studies, which remained above 3,100 under experimental validation. This innovative and adaptable design offered promising potential for applications in plasma diagnostics and high-energy-density physics research.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"861-864"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Benoit Guilhabert, Miles Toon, Saptarsi Ghosh, Dimitars Jevtics, Zhongyi Xia, Menno Kappers, Martin D Dawson, Rachel A Oliver, Michael J Strain
Transfer printing is employed to demonstrate the integration of gallium nitride (GaN)-based distributed Bragg reflectors (DBR) with 100 μm lateral dimensions and reflectance of 90% in various formats. Mesoporous GaN DBRs are utilized as basic building blocks to fabricate more complex photonic devices directly on Silicon (Si) and glass receiving substrates. Multi-mode optical resonant cavities centered at 450 nm on Si are thus formed by direct stacking of two mesoporous DBR membranes. Furthermore, active devices are also demonstrated by combining mesoporous DBR with GaN-based light-emitting diodes membranes of similar dimensions, resulting in a Fabry-Perot-mediated emission with its main peak shifted by 14 nm compared to a reference device without DBR. Measured optical bandwidth of 136 MHz (-6 dB) in a small signal modulation scheme is also demonstrated from these devices.
{"title":"Co-integration of mesoporous GaN distributed Bragg reflectors and light-emitting diodes by transfer printing.","authors":"Benoit Guilhabert, Miles Toon, Saptarsi Ghosh, Dimitars Jevtics, Zhongyi Xia, Menno Kappers, Martin D Dawson, Rachel A Oliver, Michael J Strain","doi":"10.1364/OL.584532","DOIUrl":"https://doi.org/10.1364/OL.584532","url":null,"abstract":"<p><p>Transfer printing is employed to demonstrate the integration of gallium nitride (GaN)-based distributed Bragg reflectors (DBR) with 100 μm lateral dimensions and reflectance of 90% in various formats. Mesoporous GaN DBRs are utilized as basic building blocks to fabricate more complex photonic devices directly on Silicon (Si) and glass receiving substrates. Multi-mode optical resonant cavities centered at 450 nm on Si are thus formed by direct stacking of two mesoporous DBR membranes. Furthermore, active devices are also demonstrated by combining mesoporous DBR with GaN-based light-emitting diodes membranes of similar dimensions, resulting in a Fabry-Perot-mediated emission with its main peak shifted by 14 nm compared to a reference device without DBR. Measured optical bandwidth of 136 MHz (-6 dB) in a small signal modulation scheme is also demonstrated from these devices.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"993-996"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ziqiao Liu, Yang Liao, Yuan Liu, Hanyang Gong, Zhengqi Liu, Jing Chen, Xianping Wang, Yanliang He, Xiaoshan Liu, Juan Chen, Guiqiang Liu
High-order anapoles present strongly concentrated energy and narrow resonance widths and thus become burgeoning candidates in nonlinear optical conversion and strong coupling fields. Nevertheless, existing studies are rarely focused on strong coupling simultaneously involving multi-order anapoles. Herein, we theoretically construct a three-layer stacked hybrid system with a Si nanodisk sandwiched by the MoSe2 and MoTe2 nanodisks with the same radius based on the neural network constructed by deep learning (DL). First-order and second-order anapoles are excited simultaneously in this system and couple with excitons of bulk MoTe2 and MoSe2 nanodisks, respectively. Double strong coupling behaviors are achieved between the first-order anapole and the exciton of MoTe2 , as well as the second-order anapole and the exciton of MoSe2, resulting in four energy branches with large Rabi splitting of 100.6 meV and 118.2 meV, respectively. Our work provides an effective approach for light-matter interaction involving multi-order anapoles and multiple excitons.
{"title":"Deep learning-assisted double strong coupling between multi-order anapoles and excitons.","authors":"Ziqiao Liu, Yang Liao, Yuan Liu, Hanyang Gong, Zhengqi Liu, Jing Chen, Xianping Wang, Yanliang He, Xiaoshan Liu, Juan Chen, Guiqiang Liu","doi":"10.1364/OL.584009","DOIUrl":"https://doi.org/10.1364/OL.584009","url":null,"abstract":"<p><p>High-order anapoles present strongly concentrated energy and narrow resonance widths and thus become burgeoning candidates in nonlinear optical conversion and strong coupling fields. Nevertheless, existing studies are rarely focused on strong coupling simultaneously involving multi-order anapoles. Herein, we theoretically construct a three-layer stacked hybrid system with a Si nanodisk sandwiched by the MoSe<sub>2</sub> and MoTe<sub>2</sub> nanodisks with the same radius based on the neural network constructed by deep learning (DL). First-order and second-order anapoles are excited simultaneously in this system and couple with excitons of bulk MoTe<sub>2</sub> and MoSe<sub>2</sub> nanodisks, respectively. Double strong coupling behaviors are achieved between the first-order anapole and the exciton of MoTe<sub>2</sub> , as well as the second-order anapole and the exciton of MoSe<sub>2</sub>, resulting in four energy branches with large Rabi splitting of 100.6 meV and 118.2 meV, respectively. Our work provides an effective approach for light-matter interaction involving multi-order anapoles and multiple excitons.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"873-876"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chip-scale spectrometers play important roles in spectroscopy applications. Existing on-chip components face fundamental challenges for achieving compact footprints and large number of spectral channels. We propose and demonstrate an ultra-compact computational spectrometer on a silicon-on-insulator platform. The device cascades eight micro-ring resonators and a waveguide Bragg grating for spectral filtering. The device occupies compact chip area with a single heater for thermo-tuning. A spectral resolution of 0.17 nm and an operating bandwidth of 60 nm are experimentally achieved. It corresponds to a high spectral-channel-to-footprint ratio of 88000 ch/mm2, providing a possible solution for a highly integrated spectrometer.
{"title":"Compact on-chip spectrometer with high spectral channel density using cascaded filters.","authors":"Yiming Zhang, Zimeng Zhang, Bijuan Chen, Yingping Zhao, Xiong Zheng, Ke Xu","doi":"10.1364/OL.584724","DOIUrl":"https://doi.org/10.1364/OL.584724","url":null,"abstract":"<p><p>Chip-scale spectrometers play important roles in spectroscopy applications. Existing on-chip components face fundamental challenges for achieving compact footprints and large number of spectral channels. We propose and demonstrate an ultra-compact computational spectrometer on a silicon-on-insulator platform. The device cascades eight micro-ring resonators and a waveguide Bragg grating for spectral filtering. The device occupies compact chip area with a single heater for thermo-tuning. A spectral resolution of 0.17 nm and an operating bandwidth of 60 nm are experimentally achieved. It corresponds to a high spectral-channel-to-footprint ratio of 88000 ch/mm<sup>2</sup>, providing a possible solution for a highly integrated spectrometer.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"1052-1055"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
On-chip quantum light sources are a fundamental component of integrated photonic quantum information systems. However, their performance is fundamentally limited by weak nonlinear interactions and high propagation losses, which hinder efficient generation. Here, we propose a fishbone-modulated grating structure on a silicon-nanowire waveguide to significantly enhance spontaneous four-wave mixing. The proposed structure achieves a quantum-light generation efficiency two orders of magnitude higher than conventional silicon-nanowire waveguides. Specifically, we exploit a Su-Schrieffer-Heeger-like topological interface to slow light in the waveguide, thereby enhancing the nonlinear coefficient. Moreover, we leverage the principles of bound states in the continuum to optimize the modulated gratings on the waveguide, achieving ultra-low waveguide propagation loss. The simultaneous realization of the slow-wave effect and ultralow loss effectively enhances the spontaneous four-wave mixing process in silicon. Our approach opens new possibilities for designing enhanced nonlinear nanophotonic devices using various nonlinear optical materials.
{"title":"Efficient generation of quantum light using bound states in the continuum in silicon-nanowire slow-light waveguides.","authors":"Runzhi Cao, Tianjiao Sun, Chong Sheng, Tianyu Zhang, Jiaxuan Zhou, Shining Zhu, Hui Liu","doi":"10.1364/OL.583797","DOIUrl":"https://doi.org/10.1364/OL.583797","url":null,"abstract":"<p><p>On-chip quantum light sources are a fundamental component of integrated photonic quantum information systems. However, their performance is fundamentally limited by weak nonlinear interactions and high propagation losses, which hinder efficient generation. Here, we propose a fishbone-modulated grating structure on a silicon-nanowire waveguide to significantly enhance spontaneous four-wave mixing. The proposed structure achieves a quantum-light generation efficiency two orders of magnitude higher than conventional silicon-nanowire waveguides. Specifically, we exploit a Su-Schrieffer-Heeger-like topological interface to slow light in the waveguide, thereby enhancing the nonlinear coefficient. Moreover, we leverage the principles of bound states in the continuum to optimize the modulated gratings on the waveguide, achieving ultra-low waveguide propagation loss. The simultaneous realization of the slow-wave effect and ultralow loss effectively enhances the spontaneous four-wave mixing process in silicon. Our approach opens new possibilities for designing enhanced nonlinear nanophotonic devices using various nonlinear optical materials.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"1025-1028"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recent advances in optical diffraction metagratings provide unprecedented opportunities for controlling large-angle wave scattering in photonics and spectroscopy. However, current metagrating mostly suffer from limitations on the polarization and bandwidth for extreme-angle wavefront transformation, remaining as a basic obstacle for developing metagrating devices for energy control in different polarization and frequency channels. Utilizing the orthogonally embedded grating method, a dual-polarized metagrating beam deflector is reported for high-efficiency scattering manipulation over a wide band. Exemplary cases of electromagnetic retroreflection and frequency-dependent beam scanning with a large angular range at an extreme-angle incidence are implemented at microwave frequencies. Due to the attractive features of simple geometry, extreme wavefront transformation, and dual polarization, the proposed metagratings offer possibilities for polarization and frequency division multiplexing wireless communications, remote sensing, etc.
{"title":"Frequency-dependent electromagnetic beam manipulation with dual-polarized wideband metagrating at an extreme-angle incidence.","authors":"Shaojie Wang, Jing Ning, Qi Hu, Junming Zhao, Tian Jiang, Ke Chen, Yijun Feng","doi":"10.1364/OL.584379","DOIUrl":"https://doi.org/10.1364/OL.584379","url":null,"abstract":"<p><p>Recent advances in optical diffraction metagratings provide unprecedented opportunities for controlling large-angle wave scattering in photonics and spectroscopy. However, current metagrating mostly suffer from limitations on the polarization and bandwidth for extreme-angle wavefront transformation, remaining as a basic obstacle for developing metagrating devices for energy control in different polarization and frequency channels. Utilizing the orthogonally embedded grating method, a dual-polarized metagrating beam deflector is reported for high-efficiency scattering manipulation over a wide band. Exemplary cases of electromagnetic retroreflection and frequency-dependent beam scanning with a large angular range at an extreme-angle incidence are implemented at microwave frequencies. Due to the attractive features of simple geometry, extreme wavefront transformation, and dual polarization, the proposed metagratings offer possibilities for polarization and frequency division multiplexing wireless communications, remote sensing, etc.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"981-984"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Spectral-domain phase microscopy (SDPM) enables high-sensitivity quantitative phase imaging by retrieving phase information directly from the interference spectrum, mitigating the axial-resolution penalty caused by spectral leakage in the discrete Fourier transform (DFT). However, conventional SDPM remains highly sensitive to abrupt phase gradients and noise, often leading to wrap mismatches and global bias that restrict its measurement range. In this Letter, we propose enhanced SDPM (eSDPM), an algorithm-hardware co-calibration framework that achieves high precision, bias-free phase reconstruction over an extended measurement range. On the algorithmic side, we explicitly model endpoint terms in the spectral phase, estimate a reference phase within a safe operating band, and determine a wavenumber anchor from the centroid of the source spectrum. On the hardware side, controlled spectral truncation and boundary-wavelength calibration minimize endpoint bias and wavelength misalignment. Experiments on biological and industrial samples demonstrate that eSDPM achieves continuous, bias-free, and high-accuracy optical path difference reconstruction over a broad measurement range, establishing it as a robust and practical approach for wide-range quantitative phase imaging.
{"title":"Enhanced spectral-domain phase microscopy for high-sensitivity and broad-range quantitative phase imaging via joint algorithm-hardware calibration.","authors":"Jiayi Wang, Liuhang Zhao, Runnan Zhang, Zihao Zhou, Wei Yin, Xin Yuan, Ning Zhou, Chao Zuo","doi":"10.1364/OL.585468","DOIUrl":"https://doi.org/10.1364/OL.585468","url":null,"abstract":"<p><p>Spectral-domain phase microscopy (SDPM) enables high-sensitivity quantitative phase imaging by retrieving phase information directly from the interference spectrum, mitigating the axial-resolution penalty caused by spectral leakage in the discrete Fourier transform (DFT). However, conventional SDPM remains highly sensitive to abrupt phase gradients and noise, often leading to wrap mismatches and global bias that restrict its measurement range. In this Letter, we propose enhanced SDPM (eSDPM), an algorithm-hardware co-calibration framework that achieves high precision, bias-free phase reconstruction over an extended measurement range. On the algorithmic side, we explicitly model endpoint terms in the spectral phase, estimate a reference phase within a safe operating band, and determine a wavenumber anchor from the centroid of the source spectrum. On the hardware side, controlled spectral truncation and boundary-wavelength calibration minimize endpoint bias and wavelength misalignment. Experiments on biological and industrial samples demonstrate that eSDPM achieves continuous, bias-free, and high-accuracy optical path difference reconstruction over a broad measurement range, establishing it as a robust and practical approach for wide-range quantitative phase imaging.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"885-888"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nazir Khan, Rahul Jangid, Taras Stanislavchuk, Aaron Stein, Oleg Chubar, Andi Barbour, Andrei Sirenko, Valery Kiryukhin, Claudio Mazzoli
Production and manipulation of orbital angular momentum (OAM) of coherent soft X-ray beams is demonstrated utilizing consecutive diffractive optics. OAM addition is observed upon passing the beam through consecutive fork gratings. The OAM of the beam was found to be decoupled from its spin angular momentum (SAM). Practical implementation of angular momentum control by consecutive devices in the X-ray regime opens new experimental opportunities, such as direct measurement of the beam's OAM without resorting to phase-sensitive techniques, including holography. OAM analyzers utilizing fork gratings can be used to characterize the beams produced by synchrotron and free electron lasers sources; they can also be used in scattering experiments.
{"title":"Manipulation of the orbital angular momentum of soft X-ray beams by consecutive diffractive optics.","authors":"Nazir Khan, Rahul Jangid, Taras Stanislavchuk, Aaron Stein, Oleg Chubar, Andi Barbour, Andrei Sirenko, Valery Kiryukhin, Claudio Mazzoli","doi":"10.1364/OL.584139","DOIUrl":"https://doi.org/10.1364/OL.584139","url":null,"abstract":"<p><p>Production and manipulation of orbital angular momentum (OAM) of coherent soft X-ray beams is demonstrated utilizing consecutive diffractive optics. OAM addition is observed upon passing the beam through consecutive fork gratings. The OAM of the beam was found to be decoupled from its spin angular momentum (SAM). Practical implementation of angular momentum control by consecutive devices in the X-ray regime opens new experimental opportunities, such as direct measurement of the beam's OAM without resorting to phase-sensitive techniques, including holography. OAM analyzers utilizing fork gratings can be used to characterize the beams produced by synchrotron and free electron lasers sources; they can also be used in scattering experiments.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"877-880"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Motivated by the recent advancements in terahertz metaoptics, this work investigates a metasurface capable of probing the spatial coherence of incident THz beams. Traditionally, periodic boundary conditions are applied to simulate metasurface responses under coherent illumination, whereas under incoherent illumination, both the simulation and the experiment become more complex and challenging. In this study, we employ an angular spectrum averaging technique derived from the Van Cittert-Zernike theorem, which relates the wavevector distribution of the incident beam to the spatial coherence width. The experimental measurements show good agreement with the simulation results. Additionally, we demonstrate that the depth of the metasurface transmission dip increases with decreasing spatial coherence width. Further, on the application end, we briefly discussed a metasurface-based spatial low-pass filter. The designed THz metasurface has potential applications in THz imaging, spatial filtering, and improving the signal-to-noise ratio in optical communication.
{"title":"Probing beam coherence via terahertz metasurface.","authors":"Manish Kala, Lavi Kumar Vaswani, Anuraj Panwar, Gagan Kumar, Akhilesh Kumar Mishra","doi":"10.1364/OL.589788","DOIUrl":"https://doi.org/10.1364/OL.589788","url":null,"abstract":"<p><p>Motivated by the recent advancements in terahertz metaoptics, this work investigates a metasurface capable of probing the spatial coherence of incident THz beams. Traditionally, periodic boundary conditions are applied to simulate metasurface responses under coherent illumination, whereas under incoherent illumination, both the simulation and the experiment become more complex and challenging. In this study, we employ an angular spectrum averaging technique derived from the Van Cittert-Zernike theorem, which relates the wavevector distribution of the incident beam to the spatial coherence width. The experimental measurements show good agreement with the simulation results. Additionally, we demonstrate that the depth of the metasurface transmission dip increases with decreasing spatial coherence width. Further, on the application end, we briefly discussed a metasurface-based spatial low-pass filter. The designed THz metasurface has potential applications in THz imaging, spatial filtering, and improving the signal-to-noise ratio in optical communication.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"1068-1071"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To overcome the single-modal limitations of Laser-Induced Breakdown Spectroscopy (LIBS) for identifying diverse metal corrosion types in industrial settings, we introduce a multi-modal approach by incorporating acoustic signals, termed Laser-Induced Spectroscopy-Acoustics. We propose a novel, to the best of our knowledge, dimensionality reduction method, the Peak Region Identification and Signature Mapping Algorithm (PRISM), tailored to extract features from the characteristic peaks of both the optical spectra and acoustic signals. A Random Forest (RF) model trained with PRISM-extracted features achieved a classification accuracy of 96.67%, outperforming four other machine learning methods. Feature contributions were evaluated using SHapley Additive exPlanations (SHAP). Our work demonstrates that this multimodal fusion significantly enhances classification performance and has great potential for industrial applications.
{"title":"PRISM: a peak region identification and signature mapping method based on laser-induced spectroscopy-acoustics fusion for metal corrosion discrimination.","authors":"Wenkang Sun, Wenhan Gao, Yu Zhang, Dongdong Deng, Tianzhuang Wu, Boyuan Han, Junjie Li, Ziwei Wang, Yuzhu Liu","doi":"10.1364/OL.585954","DOIUrl":"https://doi.org/10.1364/OL.585954","url":null,"abstract":"<p><p>To overcome the single-modal limitations of Laser-Induced Breakdown Spectroscopy (LIBS) for identifying diverse metal corrosion types in industrial settings, we introduce a multi-modal approach by incorporating acoustic signals, termed Laser-Induced Spectroscopy-Acoustics. We propose a novel, to the best of our knowledge, dimensionality reduction method, the Peak Region Identification and Signature Mapping Algorithm (PRISM), tailored to extract features from the characteristic peaks of both the optical spectra and acoustic signals. A Random Forest (RF) model trained with PRISM-extracted features achieved a classification accuracy of 96.67%, outperforming four other machine learning methods. Feature contributions were evaluated using SHapley Additive exPlanations (SHAP). Our work demonstrates that this multimodal fusion significantly enhances classification performance and has great potential for industrial applications.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 4","pages":"1013-1016"},"PeriodicalIF":3.3,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146195382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}