https://ir.ciomp.ac.cn:443 中国科学院长春光学精密机械与物理研究所 Wed, 20 May 2026 03:48:57 GMT 2026-05-20T03:48:57Z https://ir.ciomp.ac.cn:443/handle/181722/69799 Title: Zero-absorption-assisted multitask learning for simultaneous measurement of acetylene concentration and gas pressure from overlap-deformed spectra Authors: H. Q. Fan, P. P. Wang, H. Zhang, M. P. Hu, C. G. Zhu and Q. Wang Description: Spectral deformation from the overlap of nonconstant impurities, as well as system noises, has become one of the critical factors that limit the wide applications of tunable diode laser absorption spectroscopy, particularly when multiparameter sensing highly relies on the accuracy of retrieved spectroscopy. Herein, we demonstrate a joint retrieval model that can simultaneously measure analyte concentration and gas pressure. The model is composed of expert module, gating module and tower module, which are responsible for feature extraction, expert selection and concentration/pressure output, respectively. An alternative method of introducing zero-absorption system noise into spectral simulation prepares datasets for model training, achieving measurement of acetylene concentration (50-500 ppm) and gas pressure (0.1-1 atm) with low relative deviations maintained, even with concentration-varying ammonia. This method, in a simple manner, enables accurate multiparameter sensing in many applications, where potential spectral deformation from impurities exists. Wed, 22 Oct 2025 06:23:05 GMT https://ir.ciomp.ac.cn:443/handle/181722/69799 2025-10-22T06:23:05Z https://ir.ciomp.ac.cn:443/handle/181722/69796 Title: XR-based interactive visualization platform for real-time exploring dynamic earth science data Authors: X. L. Zhang, H. Yang, C. H. Liu, Q. Q. Tong, A. J. Xiu, L. S. Kong, M. Dan, C. Gao, M. Gao, H. Z. Che, X. Wang and G. J. Wu Description: The transition from 2D planar displays to immersive holographic 3D environments has brought advancements in visualization technology. However, there remains a lack of effective interactive visualization tools for complex multi-dimensional structured or unstructured datasets in immersive space. To address this gap, we have developed MetIVA, a state-of-the-art multiscale interactive data visualization platform that leverages the Extended Reality (XR) and cloud rendering technology for immersive data exploration. In this paper, we firstly outline the historical development of scientific visualization and the recent shift towards 3D and higher-dimensional visualization, and then basically introduce the conceptual framework and platform structure of MetIVA, and finally present the evaluation results from recruited potential users. The results confirm that MetIVA is a powerful tool to accelerate data exploration and decision-making processes. Its interactive and intuitive features, along with ongoing optimization efforts, make it a valuable tool for researchers and practitioners in the field of Earth science. Wed, 22 Oct 2025 06:23:04 GMT https://ir.ciomp.ac.cn:443/handle/181722/69796 2025-10-22T06:23:04Z https://ir.ciomp.ac.cn:443/handle/181722/69797 Title: Ytterbium as the Energy Regulator to Enhance the NIR-IIb Luminescence of Er3+-Rich Sub-20 nm Nanocrystals for Ratiometric Fluorescence Imaging Authors: W. Wang, J. Q. Yang, B. L. Ma, H. Y. Zhu, Y. Q. Zhu, Y. X. Yi, X. D. Li, Q. Q. Li, H. R. Chen, B. Li, X. G. Kong and Y. L. Chang Description: Fluorescence/luminescence bioimaging, utilizing rare-earth doped nanocrystals (RENCs) within the NIR-IIb (1500-1700 nm) sub-window, has drawn interest for its deep penetration depth and superior resolution. Herein, Er3+/Yb3+ couple is rationally designed in topologically arranged RENCs that facilitate a boosted 1530 nm emission of Er3+ via premeditated Yb3+-mediated energy transfer processes under 808 nm excitation. To maximize this modulation effect for boosting 1530 nm emission, a regional active ions concentration and spatial regulation strategy is explored in the optimized concentration and core-shell-shell structure (NaErF4:20%Yb@NaYbF4:20%Er@NaYF4 with a quantum yield of 16.46% in NIR-IIb region). Leveraging the superior emission and multi-wavelength excitation characteristics of the as-obtained nanocrystals, a NIR-IIb-based ratiometric fluorescence imaging measurement is achieved under 808 and 980 nm excitation, which cannot only show the 2D distribution of probes but also provide spatial depth information (range from 0 to 2.8 mm with a tissue depth resolution of 66 mu m). The findings hold significant potential for advancing both vascular science and clinical medicine. Wed, 22 Oct 2025 06:23:04 GMT https://ir.ciomp.ac.cn:443/handle/181722/69797 2025-10-22T06:23:04Z https://ir.ciomp.ac.cn:443/handle/181722/69798 Title: Z-Scheme g-C3N4/TiO2 heterojunction for a high energy density photo-assisted Li–O2 battery Authors: Z. Xue, Y. Ru, Q. Li, X. Liang, Y. Ma, H. Sun and Y. Lv Description: A lithium-oxygen battery based on the formation of lithium oxide (Li2O) can theoretically achieve a high energy density through a four-electron reaction. This is more challenging to accomplish than the one- and two-electron reactions that produce lithium superoxide (LiO2) and lithium peroxide (Li2O2), respectively. A stable cathode with a sufficient supply of electrons and Li cations to form Li2O must be developed to achieve a four-electron reaction for a lithium-oxygen battery. Herein, by utilizing a composite 3D-printed cathode composed of a g-C3N4/TiO2 (gCNTO) heterostructure nanoparticle with high porosity and high conductivity, we were able to provide ample space and numerous active/catalytic sites during the reaction process. Our findings indicate that Li2O is the product of the photo-assisted lithium-oxygen battery. Under illumination, the battery can be rechargeable for over 1000 hours at 0.05 mA cm−2 with a small polarization gap. The photocathode delivers an ultra-high discharge capacity of 29.7 mA h cm−2 at 0.5 mA cm−2, resulting in a specific energy of approximately 515.12 W h kg−1cell. The performance is superior to the battery with Li2O2 as a discharge product in the dark. This study paves the way for the rapid development of high-energy-density photo-assisted Li-O2 batteries. © 2024 The Royal Society of Chemistry. Wed, 22 Oct 2025 06:23:04 GMT https://ir.ciomp.ac.cn:443/handle/181722/69798 2025-10-22T06:23:04Z https://ir.ciomp.ac.cn:443/handle/181722/69795 Title: Workspace, Singularity, and Dexterity Analyses of a Six-Degrees-of-Freedom SDelta Robot With an Orthogonal Base Platform Authors: M. Toz, H. S. Q. Han and J. Angeles Description: The SDelta is a three-limb, six-degrees-of-freedom parallel kinematics machine, a pertinent candidate for high-speed operations by virtue of its simple architecture. The original design of the SDelta includes a planar base and moving platforms. Here, we propose a novel architecture for an improved SDelta, the orthogonal SDelta (OSD), with a cube-shaped orthogonal base platform. Inverse and forward position models are reported, along with singularity and dexterity analyses. Moreover, design parameters and mechanical constraints leading to a singularity-free workspace are provided. An evaluation of the system translational workspace and orientational capability, upon consideration of volume and dexterity, is included. The SDelta as well as a generic 6SPS mechanism (C, P, and S denote, respectively, the cylindrical, prismatic, and spherical kinematic pairs, the actuated pair is represented underlined, as P) are designed with the same parameters, then the performance of the SDelta, the OSD, and the 6SPS mechanisms are being compared. The results show that the orientational capability of the OSD is better than those of the 6SPS and the SDelta. Furthermore, the OSD has an average condition number of 2.9 over its translational workspace and 1.69 over a predefined effective regular workspace, which make the OSD a good candidate for operations that need both a high orientational capability and high dexterity. Wed, 22 Oct 2025 06:23:03 GMT https://ir.ciomp.ac.cn:443/handle/181722/69795 2025-10-22T06:23:03Z https://ir.ciomp.ac.cn:443/handle/181722/69793 Title: Wide-angle ultra-wideband metamaterial absorber based on complex dielectric layer in long and very long-wave infrared Authors: X. T. Chen, Z. Z. Liang, X. Y. Shi, F. M. Yang, R. Dai, Y. J. Dong, Y. Jia, X. T. Wei, E. Z. Hou and Z. Wu Description: Long and very long-wave infrared are the most important bands in infrared detection technology because of their high atmospheric window radiation energy. At present, long and very long-wave infrared detectors are widely used in atmospheric monitoring, night reconnaissance, deep space exploration and other fields. In this paper, we first analyze the coupling resonance in the dual-band absorber (Ti-Si-Ti), and the absorption rates are 97.05% and 98.95% at 6.1 mu m and 19.2 mu m, respectively. Then, a four-layer (Ti-Si-SiO2-Ti) absorber with a complex dielectric structure is obtained by using the surface plasmon resonance and the inherent absorption of the lossy material SiO2. In addition to the traditional electromagnetic field analysis, we also used the layer absorption energy loss theory to study the inherent absorption mechanism of SiO2, and the average absorption of the absorber from 19 to 24.7 mu m reached 92.87%. Finally, based on the composite dielectric layer, a thin ultrawideband absorber with four nanorods of the same size surface structure was designed, and the average absorption was 92.03% from 13.3 to 24.6 mu m. The polarization-insensitive ultra-wideband absorber proposed by us is light, simple in structure and easy to manufacture, and has potential application value in atmospheric monitoring, night reconnaissance, deep space exploration and other fields. Wed, 22 Oct 2025 06:23:02 GMT https://ir.ciomp.ac.cn:443/handle/181722/69793 2025-10-22T06:23:02Z https://ir.ciomp.ac.cn:443/handle/181722/69794 Title: Wireless Perception of High-Speed Railway Communication: Challenges, Framework, and Future Directions Authors: F. Y. Hu, Z. Ling, T. D. Liu, H. L. Li and B. Ai Description: The rapid development of 5G, 6G, and beyond is driving the European Union's "Shift2Rail Plan," which aims to promote the adoption of next-generation communication technologies for high-speed railways (HSR) in order to evolve into future smart railways. This plan emphasizes the shift from wired to wireless communication. To achieve the vision of future HSR communications, it is critical to establish a theoretical framework for the wireless perception of high-speed trains, which faces significant challenges related to reliable communication and thorough perception. However, there is currently a lack of related descriptions of the framework between train units and carriages. This article aims to address this gap by focusing on key scientific issues, such as the time-varying, non-smooth channel propagation mechanism in the space-time-frequency domain, and the optimal perception mechanism of ultra-reliability, low-latency, and large-capacity scenarios. Specifically, this article aims to revolutionize four potential key technologies: the double-dynamic time-variant non-stationary wireless channel model; the ultra-reliable, low-latency, and large-capacity wireless communication network; the thorough perception mechanism that integrates multi-source autonomous perception information fusion; and the collaborative interactive perception system that fuses adaptive centralized sampling and flexible marshaling. Based on these technologies, we aim to resolve the challenges related to intelligence, light weight, and flexible marshaling of trains, and provide technical support for the wireless communication and perception integrated system of next-generation HSR. Wed, 22 Oct 2025 06:23:02 GMT https://ir.ciomp.ac.cn:443/handle/181722/69794 2025-10-22T06:23:02Z https://ir.ciomp.ac.cn:443/handle/181722/69792 Title: White light emission and energy transfer in RE3+ doped CeF3 nanoparticles guided by first principles Authors: J. J. Liu, W. L. Yang, Z. M. Shi, Y. Yang and C. Li Description: A series of fluorescent materials, called CeF3: Tb3+, Eu3+ nanoparticles, are synthesized by a hydrothermal method. These nanoparticles are used in w-LEDs, which can be excited by different UV ranges. The VASP is used as the first principles simulation that analyzes the influence of structure on luminescence. Results show that the CeF3: Tb3+, Eu3+ nanoparticles are excited at 394 nm and two sharp red-orange emissions close to 600 nm are seen. Under excitations at 276 and 378 nm, the energy transfer effect of the Ce3+-Tb3+-Eu3+ bridge appears, which results in the emission of white light. Moreover, the energy transfer efficiency and the concentration quenching are studied and analyzed via Dexter theory. Our results clearly suggest that CeF3: Tb3+, Eu3+ nanoparticles will be useful in lighting and display materials. Wed, 22 Oct 2025 06:23:01 GMT https://ir.ciomp.ac.cn:443/handle/181722/69792 2025-10-22T06:23:01Z https://ir.ciomp.ac.cn:443/handle/181722/69791 Title: Wavefront reconstruction for extended beacons under strong atmospheric turbulence Authors: H.-D. Mao, Y.-Y. Li and J. Guo Description: Aiming at the wavefront detection without an ideal point beacon in the adaptive optical system under the strong turbulent environment, we proposed a method to detect the optical field information of extended beacons using a Plenoptic sensor. The optical field imaging principle, wavefront phase reconstruction algorithm, and error influence rule of extended beacons were studied. The imaging process of the extended beacon on the optical field sensor was simplified through the equivalence method, and the optical field images were rearranged in a specific way. The image cross-correlation and Zernike mode methods were used to realize the wavefront reconstruction of the 0° field of view. Simulation studies were conducted on error-influencing factors such as different input aberration coefficients, the number of single-row microlens elements, and noise. The results show that when the input aberration is less than 6.5 λ, the wavefront reconstruction accuracy is about 0.08 λ. For the image detector with an image resolution of 1080×1080 and pixel size of 5.5 μm, the wavefront reconstruction accuracy is the highest when the number of single row microlens units is between 40 and 50, and the system noise hardly affects the accuracy. Finally, an extended beacon wavefront detection system was built to reconstruct the four aberrant wavefronts of 0° field of view by detecting the extended beacon. The wavefront reconstruction accuracy of the experimental system is about 0.04 λ, which meets the wavefront detection requirements of the adaptive optical system. © 2024 Editorial Office of Chinese Optics. All rights reserved. Wed, 22 Oct 2025 06:23:01 GMT https://ir.ciomp.ac.cn:443/handle/181722/69791 2025-10-22T06:23:01Z https://ir.ciomp.ac.cn:443/handle/181722/69789 Title: Wafer-Scale Growth and Transfer of High-Quality MoS2 Array by Interface Design for High-Stability Flexible Photosensitive Device Authors: B. C. Lü, Y. Chen, X. B. Ma, Z. M. Shi, S. L. Zhang, Y. P. Jia, Y. H. Li, Y. Cheng, K. Jiang, W. W. Li, W. Zhang, Y. Y. Yue, S. J. Li, X. J. Sun and D. B. Li Description: Transition metal disulfide compounds (TMDCs) emerges as the promising candidate for new-generation flexible (opto-)electronic device fabrication. However, the harsh growth condition of TMDCs results in the necessity of using hard dielectric substrates, and thus the additional transfer process is essential but still challenging. Here, an efficient strategy for preparation and easy separation-transfer of high-uniform and quality-enhanced MoS2 via the precursor pre-annealing on the designed graphene inserting layer is demonstrated. Based on the novel strategy, it achieves the intact separation and transfer of a 2-inch MoS2 array onto the flexible resin. It reveals that the graphene inserting layer not only enhances MoS2 quality but also decreases interfacial adhesion for easy separation-transfer, which achieves a high yield of approximate to 99.83%. The theoretical calculations show that the chemical bonding formation at the growth interface has been eliminated by graphene. The separable graphene serves as a photocarrier transportation channel, making a largely enhanced responsivity up to 6.86 mA W-1, and the photodetector array also qualifies for imaging featured with high contrast. The flexible device exhibits high bending stability, which preserves almost 100% of initial performance after 5000 cycles. The proposed novel TMDCs growth and separation-transfer strategy lightens their significance for advances in curved and wearable (opto-)electronic applications. Wed, 22 Oct 2025 06:23:00 GMT https://ir.ciomp.ac.cn:443/handle/181722/69789 2025-10-22T06:23:00Z