Light-Science & Applications最新文献_第6页

In-operando control of sum-frequency generation in tip-enhanced nanocavities 尖端增强纳米腔中和频率产生的操作控制

Light-Science & Applications Pub Date : 2025-05-22 DOI: 10.1038/s41377-025-01855-5

Philippe Roelli, Isabel Pascual Robledo, Iris Niehues, Javier Aizpurua, Rainer Hillenbrand

{"title":"In-operando control of sum-frequency generation in tip-enhanced nanocavities","authors":"Philippe Roelli, Isabel Pascual Robledo, Iris Niehues, Javier Aizpurua, Rainer Hillenbrand","doi":"10.1038/s41377-025-01855-5","DOIUrl":"https://doi.org/10.1038/s41377-025-01855-5","url":null,"abstract":"Sum-frequency generation (SFG) is a second-order nonlinear process widely used for characterizing surfaces and interfaces with monolayer sensitivity. Recently, optical field enhancement in plasmonic nanocavities has enabled SFG with continuous wave (CW) lasers from nanoscale areas of molecules, promising applications like nanoscale SFG spectroscopy and coherent upconversion for mid-infrared detection at visible frequencies. Here, we demonstrate CW SFG from individual nanoparticle-on-mirror (NPoM) cavities, which are resonant at visible frequencies and filled with a monolayer of molecules, when placed beneath a metal scanning probe tip. The tip acts as an efficient broadband antenna, focusing incident CW infrared illumination onto the nanocavity. The cascaded near-field enhancement within the NPoM nanocavity yields nonlinear optical responses across a broad range of infrared frequencies, achieving SFG enhancements of up to 14 orders of magnitude. Further, nanomechanical positioning of the tip allows for in-operando control of SFG by tuning the local field enhancement rather than the illumination intensities. The versatility of tip-enhanced nanocavities allows for SFG studies of a wide range of molecular species in the few-molecule regime without the need for complex nanofabrication. Our results also promise SFG nanoimaging with tips providing strong visible and IR field enhancement at their apex, offering a robust platform for future applications in nonlinear nanooptics.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum computing predicts particle trajectories in optical tweezers 量子计算预测光镊中的粒子轨迹

Light-Science & Applications Pub Date : 2025-05-22 DOI: 10.1038/s41377-025-01879-x

Da-Wei Wang

引用次数: 0

Light-powered phagocytic macrophage microrobot (phagobot): both in vitro and in vivo. 光能吞噬巨噬细胞微型机器人（phagobot）：体内体外均可。

Light-Science & Applications Pub Date : 2025-05-19 DOI: 10.1038/s41377-025-01881-3

Xing Li,Shuhan Zhong,Ting Pan,Jianyun Xiong,Guoshuai Zhu,Yang Shi,Hongbao Xin

{"title":"Light-powered phagocytic macrophage microrobot (phagobot): both in vitro and in vivo.","authors":"Xing Li,Shuhan Zhong,Ting Pan,Jianyun Xiong,Guoshuai Zhu,Yang Shi,Hongbao Xin","doi":"10.1038/s41377-025-01881-3","DOIUrl":"https://doi.org/10.1038/s41377-025-01881-3","url":null,"abstract":"Micro/nanorobots based on immune cells show great potential for addressing challenging biological and biomedical conditions. However, their powerful innate immune functions, particularly the phagocytosis capabilities, remain a big challenge to fully leverage with the current designs of immune cell-based microrobots. Herein, we report a light-powered phagocytic macrophage microrobot (phagobot), which is capable of robotic navigation toward specific foreign bio-threats and executing precise phagocytosis of these targeted entities under light control. Without genetic modification or nanoengineering of macrophages, the phagobot's \"wake-up\" program is achieved through direct activation of a resting-state macrophage by a tightly focused near-infrared (NIR) light beam. The phagobot exhibits robotic steering and directional navigation controlled by optical manipulation of the extended pseudopodia within the activated macrophage. It can further execute targeted phagocytic clearance tasks via engulfing various foreign bio-threats, including nanoplastics, microbials, and cancer cell debris. Notably, the phagobot can be constructed in a living larval zebrafish through optical activation and manipulation of the endogenous macrophage, which also exhibits controllable navigation and targeted phagocytic capabilities in vivo. With the intrinsic immune functions of macrophages, our light-powered phagobot represents a novel form of intelligent immune cell-based microrobots, holding many new possibilities for precise immune regulation and treatment for immune-related diseases.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"234 1","pages":"202"},"PeriodicalIF":0.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144087520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonreciprocal spontaneous parametric process 非互易自发参数过程

Light-Science & Applications Pub Date : 2025-05-19 DOI: 10.1038/s41377-025-01844-8

Changbiao Li, Jiaqi Yuan, Ruidong He, Jiawei Yu, Yanpeng Zhang, Min Xiao, Keyu Xia, Zhaoyang Zhang

{"title":"Nonreciprocal spontaneous parametric process","authors":"Changbiao Li, Jiaqi Yuan, Ruidong He, Jiawei Yu, Yanpeng Zhang, Min Xiao, Keyu Xia, Zhaoyang Zhang","doi":"10.1038/s41377-025-01844-8","DOIUrl":"https://doi.org/10.1038/s41377-025-01844-8","url":null,"abstract":"Mediated by the interactions with quantum vacuum fields, a probe laser field propagating in a nonlinear optical medium can generate new pair of light fields over a broad spectral range via spontaneous parametric process. Such process is inherently independent of the incident direction of light and reciprocal thus far, due to the direction-independent field-vacuum interactions. In this work, we experimentally demonstrate within sodium atomic vapors that such spontaneous parametric process can be nonreciprocal by unidirectionally coupling it to another pumped four-wave mixing process. Thanks to the broad bandwidth of the spontaneous parametric process, in combination with the Doppler and power-induced broadening of atomic energy levels, we achieve optical isolation with isolation ratio >25 dB over a bandwidth larger than 100 GHz. Considering that both spontaneous parametric processes and the pumped four-wave mixing have been realized in diverse solid photonic platforms, the demonstrated concept can motivate further explorations in the design of integrated magnetic-free broadband optical nonreciprocity via the interactions between nonlinear optical processes.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High responsivity colloidal quantum dots phototransistors for low-dose near-infrared photodetection and image communication. 用于低剂量近红外光探测和图像通信的高响应度胶体量子点光电晶体管。

Light-Science & Applications Pub Date : 2025-05-19 DOI: 10.1038/s41377-025-01853-7

Shijie Zhan,Benxuan Li,Tong Chen,Yudi Tu,Hong Ji,Diyar Mousa Othman,Mingfei Xiao,Renjun Liu,Zuhong Zhang,Ying Tang,Wenlong Ming,Meng Li,Hang Zhou,Bo Hou

{"title":"High responsivity colloidal quantum dots phototransistors for low-dose near-infrared photodetection and image communication.","authors":"Shijie Zhan,Benxuan Li,Tong Chen,Yudi Tu,Hong Ji,Diyar Mousa Othman,Mingfei Xiao,Renjun Liu,Zuhong Zhang,Ying Tang,Wenlong Ming,Meng Li,Hang Zhou,Bo Hou","doi":"10.1038/s41377-025-01853-7","DOIUrl":"https://doi.org/10.1038/s41377-025-01853-7","url":null,"abstract":"The surging demand and adoption of infrared photodetectors (IRPDs) in sectors of imaging, mobile, healthcare, automobiles, and optical communication are hindered by the prohibitive costs of traditional IRPD materials such as InGaAs and HgCdTe. Quantum dots (QDs), especially lead chalcogenide (PbS) QDs, represent the next-generation low-bandgap semiconductors for near-infrared (NIR) detection due to their high optical absorption coefficient, tunable bandgap, low fabrication costs, and device compatibility. Innovative techniques such as ligand exchange processes have been proposed to boost the performance of PbS QDs photodetectors, mostly using short ligands like 1,2-ethanedithiol (EDT) and tetrabutylammonium iodide (TBAI). Our study explores the use of long-chain dithiol ligands to enhance the responsivity of PbS QDs/InGaZnO phototransistors. Long-chain dithiol ligands are found to suppress horizontal electron transport/leakage and electron trapping, which is beneficial for responsivity. Utilizing a novel ligand-exchange technique with 1,10-decanedithiol (DDT), we develop high-performance hybrid phototransistors with detectivity exceeding 1014 Jones. Based on these phototransistors, we demonstrate image communication through a NIR optical communication system. The long-ligand PbS QDs/InGaZnO hybrid phototransistor demonstrates significant potential for NIR low-dose imaging and optical communication, particularly in scenarios requiring the detection of weak light signals at low frequencies.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"30 1","pages":"201"},"PeriodicalIF":0.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144087603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dispersion-engineered spin photonics based on folded-path metasurfaces 基于折叠路径超表面的色散工程自旋光子学

Light-Science & Applications Pub Date : 2025-05-16 DOI: 10.1038/s41377-025-01850-w

Fei Zhang, Hanlin Bao, Mingbo Pu, Yinghui Guo, Tongtong Kang, Xiong Li, Qiong He, Mingfeng Xu, Xiaoliang Ma, Xiangang Luo

{"title":"Dispersion-engineered spin photonics based on folded-path metasurfaces","authors":"Fei Zhang, Hanlin Bao, Mingbo Pu, Yinghui Guo, Tongtong Kang, Xiong Li, Qiong He, Mingfeng Xu, Xiaoliang Ma, Xiangang Luo","doi":"10.1038/s41377-025-01850-w","DOIUrl":"https://doi.org/10.1038/s41377-025-01850-w","url":null,"abstract":"Spin photonics revolutionizes photonic technology by enabling precise manipulation of photon spin states, with spin-decoupled metasurfaces emerging as pivotal in complex optical field manipulation. Here, we propose a folded-path metasurface concept that enables independent dispersion and phase control of two opposite spin states, effectively overcoming the limitations of spin photonics in achieving broadband decoupling and higher integration levels. This advanced dispersion engineering is achieved by modifying the equivalent length of a folded path, generated by a virtual reflective surface, in contrast to previous methods that depended on effective refractive index control by altering structural geometries. Our approach unlocks previously unattainable capabilities, such as achieving achromatic focusing and achromatic spin Hall effect using the rotational degree of freedom, and generating spatiotemporal vector optical fields with only a single metasurface. This advancement substantially broadens the potential of metasurface-based spin photonics, extending its applications from the spatial domain to the spatiotemporal domain.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser-written reconfigurable photonic integrated circuit directly coupled to a single-photon avalanche diode array 激光写入可重构光子集成电路直接耦合到单光子雪崩二极管阵列

Light-Science & Applications Pub Date : 2025-05-16 DOI: 10.1038/s41377-025-01854-6

Giulio Gualandi, Simone Atzeni, Marco Gardina, Antonino Caime, Giacomo Corrielli, Ivan Labanca, Angelo Gulinatti, Ivan Rech, Roberto Osellame, Giulia Acconcia, Francesco Ceccarelli

{"title":"Laser-written reconfigurable photonic integrated circuit directly coupled to a single-photon avalanche diode array","authors":"Giulio Gualandi, Simone Atzeni, Marco Gardina, Antonino Caime, Giacomo Corrielli, Ivan Labanca, Angelo Gulinatti, Ivan Rech, Roberto Osellame, Giulia Acconcia, Francesco Ceccarelli","doi":"10.1038/s41377-025-01854-6","DOIUrl":"https://doi.org/10.1038/s41377-025-01854-6","url":null,"abstract":"To date, most integrated quantum photonics experiments rely on single-photon detectors operating at cryogenic temperatures coupled to photonic integrated circuits (PICs) through single-mode optical fibers. This approach presents significant challenges due to the detection complexity, as cryogenic conditions hinder the development of scalable systems. In addition, going towards fully-integrated devices or, at least, removing the optical fibers would be also advantageous to develop compact and cost-efficient solutions featuring a high number of optical modes. This work reports on the direct coupling of a PIC, fabricated by femtosecond laser writing (FLW), and a silicon single-photon avalanche diode (SPAD) array, fabricated in a custom planar technology and compatible with the operation at room temperature. The effectiveness of this solution is shown by achieving perfect coupling and a system detection efficiency as high as 41.0% at a wavelength of 561 nm, which is the highest value reported to date among both heterogeneous/hybrid integrated and directly coupled systems. We also show the robustness of the coupling to misalignments, demonstrating that costly alignment procedures are not needed. Finally, we exploit the SPAD array to characterize a reconfigurable Mach-Zehnder interferometer, i.e., the basic building block of multimode reconfigurable PICs. This solution provides a new avenue to the design and implementation of quantum photonics experiments, especially effective when compact and cost-efficient systems are needed.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144066262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-step photo-induced self-assembled hydrogel for endogenous oral mucosal wound healing 双步光诱导自组装水凝胶用于内源性口腔黏膜伤口愈合

Light-Science & Applications Pub Date : 2025-05-15 DOI: 10.1038/s41377-025-01837-7

Shaojun Fang, Qiangqiang Zhou, Mengqi Zhou, Changyi Li, Huaxing Xu, Hongyu Tang, Wanlu Zhang, Ruiqian Guo, Xiaoling Wei, Rongjun Zhang

{"title":"Dual-step photo-induced self-assembled hydrogel for endogenous oral mucosal wound healing","authors":"Shaojun Fang, Qiangqiang Zhou, Mengqi Zhou, Changyi Li, Huaxing Xu, Hongyu Tang, Wanlu Zhang, Ruiqian Guo, Xiaoling Wei, Rongjun Zhang","doi":"10.1038/s41377-025-01837-7","DOIUrl":"https://doi.org/10.1038/s41377-025-01837-7","url":null,"abstract":"By introducing piezoelectric materials into hydrogel oral dressings, a microelectric field could be generated under stress stimulation, thus facilitating oral wound healing. However, to adapt to the moist and dynamic environment of the oral cavity, traditional “step-by-step” synthesis often requires the combination of materials with different functionalities. Given the property differences between these materials, this strategy typically involves complex experimental procedures and unnecessary energy consumption. In this study, with the concept of “integrated construction”, we innovatively proposed a dual-step photo-induced method and successfully fabricated composite hydrogels with excellent performance. We introduced abundant oxygen vacancies into ZnO, leveraging the enhanced interface dynamics to achieve sustained photo-induced effect. With a double-network polymer framework as a template, this method could achieve the photo-induced spontaneous in-situ synthesis of polydopamine (PDA) within hydrogel without any extra special experimental conditions and complex operation procedures. We conducted a thorough analysis of the mechanism underlying this photo-induced method and applied the as-prepared hydrogel for the treatment of oral wounds, which significantly accelerated the healing process due to the outstanding comprehensive performance of hydrogel. These results suggest novel ideas and theoretical support for the facile construction of high-performance hydrogels based on photodynamic principles, demonstrating immense potential for future applications in wound dressings.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143979535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D nanoprinted fiber-interfaced hollow-core waveguides for high-accuracy nanoparticle tracking analysis 用于高精度纳米颗粒跟踪分析的3D纳米打印光纤接口空心波导

Light-Science & Applications Pub Date : 2025-05-15 DOI: 10.1038/s41377-025-01827-9

Diana Pereira, Torsten Wieduwilt, Walter Hauswald, Matthias Zeisberger, Marta S. Ferreira, Markus A. Schmidt

{"title":"3D nanoprinted fiber-interfaced hollow-core waveguides for high-accuracy nanoparticle tracking analysis","authors":"Diana Pereira, Torsten Wieduwilt, Walter Hauswald, Matthias Zeisberger, Marta S. Ferreira, Markus A. Schmidt","doi":"10.1038/s41377-025-01827-9","DOIUrl":"https://doi.org/10.1038/s41377-025-01827-9","url":null,"abstract":"The integration of functional components into flexible photonic environments is a critical area of research in integrated photonics and is essential for high-precision sensing. This work presents a novel concept of interfacing square-core hollow-core waveguides with commercially available optical fibers using 3D nanoprinting, and demonstrates its practical relevance through a nanoscience-based characterization technique. In detail, this innovative concept results in a monolithic, fully fiber-integrated device with key advantages such as alignment-free operation, high-purity fundamental mode excitation, full polarization control, and a unique handling flexibility. For the first time, the application potential of a fiber-interfaced waveguide in nanoscale analysis is demonstrated by performing nanoparticle-tracking-analysis experiments. These experiments involve the tracking and analysis of individual gold nanospheres diffusing in the hollow core waveguide, enabled by nearly aberration-free imaging, extended observation times, and homogeneous light-line illumination. The study comprehensively covers design strategy, experimental implementation, key principles, optical characterization, and practical applications. The fiber-interfaced hollow-core waveguide concept offers significant potential for applications in bioanalytics, environmental sciences, quantum technologies, optical manipulation, and life sciences. It also paves the way for the development of novel all-fiber devices that exploit enhanced light-matter interaction in a monolithic form suitable for flexible and remote applications.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143979438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Operando ZnO recrystallization for efficient quantum-dot light-emitting diodes 高效量子点发光二极管的ZnO再结晶研究

Light-Science & Applications Pub Date : 2025-05-15 DOI: 10.1038/s41377-025-01867-1

Song Wang, Shihao Liu, Ting Wang, Jialin Bai, Jingyu Peng, Hanzhuang Zhang, Wenfa Xie, Wenyu Ji

{"title":"Operando ZnO recrystallization for efficient quantum-dot light-emitting diodes","authors":"Song Wang, Shihao Liu, Ting Wang, Jialin Bai, Jingyu Peng, Hanzhuang Zhang, Wenfa Xie, Wenyu Ji","doi":"10.1038/s41377-025-01867-1","DOIUrl":"https://doi.org/10.1038/s41377-025-01867-1","url":null,"abstract":"ZnO nanoparticles (NPs) play a crucial role in advancing quantum-dot light-emitting diodes (QLEDs) because of their excellent electron transport properties. While the conductivity of ZnO is determined by both the density and mobility of charge carriers, a previously overlooked problem is that excessive carrier density in ZnO can lead to nonradiative Auger recombination at the quantum-dot/ZnO interface. An ideal electron transport layer should possess both high mobility and low carrier density. Here, we achieve such transport properties in ZnO NP films through operando recrystallization, a process triggered by the diffusion of Al ions from the cathode under acidic conditions. This diffusion induces the coalescence of neighboring ZnO NPs, forming defect-passivated, long-range ZnO crystals. When used as the electron transport layer in QLEDs, recrystallized ZnO NPs enhance the external quantum efficiency from 17.2% to 33.7% compared with devices with conventional ZnO electron transport layers. These findings offer valuable insights into the development of charge transport materials for high-performance optoelectronic devices.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"143 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143979536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0