Light, science & applications最新文献_第3页

Learnable digital signal processing: a new benchmark of linearity compensation for optical fiber communications. 可学习的数字信号处理：光纤通信线性补偿的新基准。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-08-13 DOI: 10.1038/s41377-024-01556-5

Zekun Niu, Hang Yang, Lyu Li, Minghui Shi, Guozhi Xu, Weisheng Hu, Lilin Yi

{"title":"Learnable digital signal processing: a new benchmark of linearity compensation for optical fiber communications.","authors":"Zekun Niu, Hang Yang, Lyu Li, Minghui Shi, Guozhi Xu, Weisheng Hu, Lilin Yi","doi":"10.1038/s41377-024-01556-5","DOIUrl":"10.1038/s41377-024-01556-5","url":null,"abstract":"The surge in interest regarding the next generation of optical fiber transmission has stimulated the development of digital signal processing (DSP) schemes that are highly cost-effective with both high performance and low complexity. As benchmarks for nonlinear compensation methods, however, traditional DSP designed with block-by-block modules for linear compensations, could exhibit residual linear effects after compensation, limiting the nonlinear compensation performance. Here we propose a high-efficient design thought for DSP based on the learnable perspectivity, called learnable DSP (LDSP). LDSP reuses the traditional DSP modules, regarding the whole DSP as a deep learning framework and optimizing the DSP parameters adaptively based on backpropagation algorithm from a global scale. This method not only establishes new standards in linear DSP performance but also serves as a critical benchmark for nonlinear DSP designs. In comparison to traditional DSP with hyperparameter optimization, a notable enhancement of approximately 1.21 dB in the Q factor for 400 Gb/s signal after 1600 km fiber transmission is experimentally demonstrated by combining LDSP and perturbation-based nonlinear compensation algorithm. Benefiting from the learnable model, LDSP can learn the best configuration adaptively with low complexity, reducing dependence on initial parameters. The proposed approach implements a symbol-rate DSP with a small bit error rate (BER) cost in exchange for a 48% complexity reduction compared to the conventional 2 samples/symbol processing. We believe that LDSP represents a new and highly efficient paradigm for DSP design, which is poised to attract considerable attention across various domains of optical communications.","PeriodicalId":18093,"journal":{"name":"Light, science & applications","volume":"13 1","pages":"188"},"PeriodicalIF":19.4,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11319808/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141971416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Author Correction: Strong nonlinear optical processes with extraordinary polarization anisotropy in inversion-symmetry broken two-dimensional PdPSe. 作者更正：反转对称破碎的二维 PdPSe 中具有超常偏振各向异性的强非线性光学过程。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-08-12 DOI: 10.1038/s41377-024-01522-1

Song Zhu, Ruihuan Duan, Xiaodong Xu, Fangyuan Sun, Wenduo Chen, Fakun Wang, Siyuan Li, Ming Ye, Xin Zhou, Jinluo Cheng, Yao Wu, Houkun Liang, Junichiro Kono, Xingji Li, Zheng Liu, Qi Jie Wang

引用次数: 0

Breaking the in-coupling efficiency limit in waveguide-based AR displays with polarization volume gratings. 利用偏振体光栅打破基于波导的 AR 显示屏的内耦合效率限制。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-08-12 DOI: 10.1038/s41377-024-01537-8

Yuqiang Ding, Yuchen Gu, Qian Yang, Zhiyong Yang, Yuge Huang, Yishi Weng, Yuning Zhang, Shin-Tson Wu

{"title":"Breaking the in-coupling efficiency limit in waveguide-based AR displays with polarization volume gratings.","authors":"Yuqiang Ding, Yuchen Gu, Qian Yang, Zhiyong Yang, Yuge Huang, Yishi Weng, Yuning Zhang, Shin-Tson Wu","doi":"10.1038/s41377-024-01537-8","DOIUrl":"10.1038/s41377-024-01537-8","url":null,"abstract":"Augmented reality (AR) displays, heralded as the next-generation platform for spatial computing, metaverse, and digital twins, empower users to perceive digital images overlaid with real-world environment, fostering a deeper level of human-digital interactions. With the rapid evolution of couplers, waveguide-based AR displays have streamlined the entire system, boasting a slim form factor and high optical performance. However, challenges persist in the waveguide combiner, including low optical efficiency and poor image uniformity, significantly hindering the long-term usage and user experience. In this paper, we first analyze the root causes of the low optical efficiency and poor uniformity in waveguide-based AR displays. We then discover and elucidate an anomalous polarization conversion phenomenon inherent to polarization volume gratings (PVGs) when the incident light direction does not satisfy the Bragg condition. This new property is effectively leveraged to circumvent the tradeoff between in-coupling efficiency and eyebox uniformity. Through feasibility demonstration experiments, we measure the light leakage in multiple PVGs with varying thicknesses using a laser source and a liquid-crystal-on-silicon light engine. The experiment corroborates the polarization conversion phenomenon, and the results align with simulation well. To explore the potential of such a polarization conversion phenomenon further, we design and simulate a waveguide display with a 50° field of view. Through achieving first-order polarization conversion in a PVG, the in-coupling efficiency and uniformity are improved by 2 times and 2.3 times, respectively, compared to conventional couplers. This groundbreaking discovery holds immense potential for revolutionizing next-generation waveguide-based AR displays, promising a higher efficiency and superior image uniformity.","PeriodicalId":18093,"journal":{"name":"Light, science & applications","volume":"13 1","pages":"185"},"PeriodicalIF":19.4,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11317523/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141917028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Meta Shack-Hartmann wavefront sensor with large sampling density and large angular field of view: phase imaging of complex objects. 具有大采样密度和大角度视场的 Meta Shack-Hartmann 波前传感器：复杂物体的相位成像。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-08-12 DOI: 10.1038/s41377-024-01528-9

Gi-Hyun Go, Dong-Gu Lee, Jaeyeon Oh, Gookho Song, Doeon Lee, Mooseok Jang

{"title":"Meta Shack-Hartmann wavefront sensor with large sampling density and large angular field of view: phase imaging of complex objects.","authors":"Gi-Hyun Go, Dong-Gu Lee, Jaeyeon Oh, Gookho Song, Doeon Lee, Mooseok Jang","doi":"10.1038/s41377-024-01528-9","DOIUrl":"10.1038/s41377-024-01528-9","url":null,"abstract":"Shack-Hartmann wavefront sensors measure the local slopes of an incoming wavefront based on the displacement of focal spots created by a lenslet array, serving as key components for adaptive optics for astronomical and biomedical imaging. Traditionally, the challenges in increasing the density and the curvature of the lenslet have limited the use of such wavefront sensors in characterizing slowly varying wavefront structures. Here, we develop a metasurface-enhanced Shack-Hartmann wavefront sensor (meta SHWFS) to break this limit, considering the interplay between the lenslet parameters and the performance of SHWFS. We experimentally validate the meta SHWFS with a sampling density of 5963 per mm2 and a maximum acceptance angle of 8° which outperforms the traditional SFWFS by an order of magnitude. Furthermore, to the best of our knowledge, we demonstrate the first use of a wavefront sensing scheme in single-shot phase imaging of highly complex patterns, including biological tissue patterns. The proposed approach opens up new opportunities in incorporating exceptional light manipulation capabilities of the metasurface platform in complex wavefront characterization.","PeriodicalId":18093,"journal":{"name":"Light, science & applications","volume":"13 1","pages":"187"},"PeriodicalIF":19.4,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11319597/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141971417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fast, faster, and the fastest structured illumination microscopy. 更快、更快、更快的结构照明显微镜。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-08-12 DOI: 10.1038/s41377-024-01505-2

Tianyu Zhao, Ming Lei

引用次数: 0

Upconversion-based chiral nanoprobe for highly selective dual-mode sensing and bioimaging of hydrogen sulfide in vitro and in vivo. 基于上转换的手性纳米探针，用于体外和体内硫化氢的高选择性双模式传感和生物成像。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-08-01 DOI: 10.1038/s41377-024-01539-6

Yang Lu, Xu Zhao, Dongmei Yan, Yingqian Mi, Peng Sun, Xu Yan, Xiaomin Liu, Geyu Lu

{"title":"Upconversion-based chiral nanoprobe for highly selective dual-mode sensing and bioimaging of hydrogen sulfide in vitro and in vivo.","authors":"Yang Lu, Xu Zhao, Dongmei Yan, Yingqian Mi, Peng Sun, Xu Yan, Xiaomin Liu, Geyu Lu","doi":"10.1038/s41377-024-01539-6","DOIUrl":"10.1038/s41377-024-01539-6","url":null,"abstract":"Chiral assemblies have become one of the most active research areas due to their versatility, playing an increasingly important role in bio-detection, imaging and therapy. In this work, chiral UCNPs/CuxOS@ZIF nanoprobes are prepared by encapsulating upconversion nanoparticles (UCNPs) and CuxOS nanoparticles (NPs) into zeolitic imidazolate framework-8 (ZIF-8). The novel excited-state energy distribution-modulated upconversion nanostructure (NaYbF4@NaYF4: Yb, Er) is selected as the fluorescence source and energy donor for highly efficient fluorescence resonance energy transfer (FRET). CuxOS NP is employed as chiral source and energy acceptor to quench upconversion luminescence (UCL) and provide circular dichroism (CD) signal. Utilizing the natural adsorption and sorting advantages of ZIF-8, the designed nanoprobe can isolate the influence of other common disruptors, thus achieve ultra-sensitive and highly selective UCL/CD dual-mode quantification of H2S in aqueous solution and in living cells. Notably, the nanoprobe is also capable of in vivo intra-tumoral H2S tracking. Our work highlights the multifunctional properties of chiral nanocomposites in sensing and opens a new vision and idea for the preparation and application of chiral nanomaterials in biomedical and biological analysis.","PeriodicalId":18093,"journal":{"name":"Light, science & applications","volume":"13 1","pages":"180"},"PeriodicalIF":19.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11294450/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141875274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards mixed physical node reservoir computing: light-emitting synaptic reservoir system with dual photoelectric output. 实现混合物理节点水库计算：具有双光电输出的发光突触水库系统。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-08-01 DOI: 10.1038/s41377-024-01516-z

Minrui Lian, Changsong Gao, Zhenyuan Lin, Liuting Shan, Cong Chen, Yi Zou, Enping Cheng, Changfei Liu, Tailiang Guo, Wei Chen, Huipeng Chen

{"title":"Towards mixed physical node reservoir computing: light-emitting synaptic reservoir system with dual photoelectric output.","authors":"Minrui Lian, Changsong Gao, Zhenyuan Lin, Liuting Shan, Cong Chen, Yi Zou, Enping Cheng, Changfei Liu, Tailiang Guo, Wei Chen, Huipeng Chen","doi":"10.1038/s41377-024-01516-z","DOIUrl":"10.1038/s41377-024-01516-z","url":null,"abstract":"Memristor-based physical reservoir computing holds significant potential for efficiently processing complex spatiotemporal data, which is crucial for advancing artificial intelligence. However, owing to the single physical node mapping characteristic of traditional memristor reservoir computing, it inevitably induces high repeatability of eigenvalues to a certain extent and significantly limits the efficiency and performance of memristor-based reservoir computing for complex tasks. Hence, this work firstly reports an artificial light-emitting synaptic (LES) device with dual photoelectric output for reservoir computing, and a reservoir system with mixed physical nodes is proposed. The system effectively transforms the input signal into two eigenvalue outputs using a mixed physical node reservoir comprising distinct physical quantities, namely optical output with nonlinear optical effects and electrical output with memory characteristics. Unlike previously reported memristor-based reservoir systems, which pursue rich reservoir states in one physical dimension, our mixed physical node reservoir system can obtain reservoir states in two physical dimensions with one input without increasing the number and types of devices. The recognition rate of the artificial light-emitting synaptic reservoir system can achieve 97.22% in MNIST recognition. Furthermore, the recognition task of multichannel images can be realized through the nonlinear mapping of the photoelectric dual reservoir, resulting in a recognition accuracy of 99.25%. The mixed physical node reservoir computing proposed in this work is promising for implementing the development of photoelectric mixed neural networks and material-algorithm collaborative design.","PeriodicalId":18093,"journal":{"name":"Light, science & applications","volume":"13 1","pages":"179"},"PeriodicalIF":19.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11291830/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141860235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anisotropic phonon dynamics in Dirac semimetal PtTe₂ thin films enabled by helicity-dependent ultrafast light excitation. 各向异性声子动力学在依赖螺旋的超快光激发的狄拉克半金属 PtTe2 薄膜中的实现。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-08-01 DOI: 10.1038/s41377-024-01540-z

Ziyang Li, Yequan Chen, Anke Song, Jinzhong Zhang, Rong Zhang, Zongzhi Zhang, Xuefeng Wang

{"title":"Anisotropic phonon dynamics in Dirac semimetal PtTe2 thin films enabled by helicity-dependent ultrafast light excitation.","authors":"Ziyang Li, Yequan Chen, Anke Song, Jinzhong Zhang, Rong Zhang, Zongzhi Zhang, Xuefeng Wang","doi":"10.1038/s41377-024-01540-z","DOIUrl":"10.1038/s41377-024-01540-z","url":null,"abstract":"Coherent phonons have aroused considerable attention in condensed matter physics owing to their extraordinary capacity of reflecting and controlling the physical properties of matter. However, the investigation on the interaction between coherent phonons and other microscopic particles on the ultrafast timescale within topological systems continues to be an active and unresolved area. Here, we show the energy transfer of coherent optical phonons (COP) in Dirac semimetal PtTe2 thin films using ultrafast optical pump-probe spectroscopy. Specifically, the helicity-dependent light-driven anisotropic COP signals disclose their direct connection with the light-excited anisotropic spin-polarized electrons via an angular momentum transfer. Furthermore, we observe the notable decreases in the COP oscillation frequency and the decay rate with increasing temperatures due to the anharmonic phonon-phonon scattering and electron-phonon scattering in the COP dissipation process, respectively. Our work paves the way for uncovering the coherent phonons in Dirac semimetals for the potential applications in optoelectronics and opto-spintronics.","PeriodicalId":18093,"journal":{"name":"Light, science & applications","volume":"13 1","pages":"181"},"PeriodicalIF":19.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11294612/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141875273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vertically stacked skin-like active-matrix display with ultrahigh aperture ratio. 垂直堆叠的类肤质主动矩阵显示屏，具有超高光圈比。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-07-26 DOI: 10.1038/s41377-024-01524-z

Juntong Li, Yanping Ni, Xiaoli Zhao, Bin Wang, Chuang Xue, Zetong Bi, Cong Zhang, Yongjun Dong, Yanhong Tong, Qingxin Tang, Yichun Liu

{"title":"Vertically stacked skin-like active-matrix display with ultrahigh aperture ratio.","authors":"Juntong Li, Yanping Ni, Xiaoli Zhao, Bin Wang, Chuang Xue, Zetong Bi, Cong Zhang, Yongjun Dong, Yanhong Tong, Qingxin Tang, Yichun Liu","doi":"10.1038/s41377-024-01524-z","DOIUrl":"10.1038/s41377-024-01524-z","url":null,"abstract":"Vertically stacked all-organic active-matrix organic light-emitting diodes are promising candidates for high-quality skin-like displays due to their high aperture ratio, extreme mechanical flexibility, and low-temperature processing ability. However, these displays suffer from process interferences when interconnecting functional layers made of all-organic materials. To overcome this challenge, we present an innovative integration strategy called \"discrete preparation-multilayer lamination\" based on microelectronic processes. In this strategy, each functional layer was prepared separately on different substrates to avoid chemical and physical damage caused by process interferences. A single interconnect layer was introduced between each vertically stacked functional layer to ensure mechanical compatibility and interconnection. Compared to the previously reported layer-by-layer preparation method, the proposed method eliminates the need for tedious protection via barrier and pixel-defining layer processing steps. Additionally, based on active-matrix display, this strategy allows multiple pixels to collectively display a pattern of \"1\" with an aperture ratio of 83%. Moreover, the average mobility of full-photolithographic organic thin-film transistors was 1.04 cm2 V-1 s-1, ensuring stable and uniform displays. This strategy forms the basis for the construction of vertically stacked active-matrix displays, which should facilitate the commercial development of skin-like displays in wearable electronics.","PeriodicalId":18093,"journal":{"name":"Light, science & applications","volume":"13 1","pages":"177"},"PeriodicalIF":19.4,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11282298/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141766477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband nonreciprocal thermal emissivity and absorptivity. 宽带非互易热发射率和吸收率。

IF 19.4 1区物理与天体物理

Light, science & applications Pub Date : 2024-07-24 DOI: 10.1038/s41377-024-01520-3

Komron J Shayegan, Jae S Hwang, Bo Zhao, Aaswath P Raman, Harry A Atwater

{"title":"Broadband nonreciprocal thermal emissivity and absorptivity.","authors":"Komron J Shayegan, Jae S Hwang, Bo Zhao, Aaswath P Raman, Harry A Atwater","doi":"10.1038/s41377-024-01520-3","DOIUrl":"10.1038/s41377-024-01520-3","url":null,"abstract":"A body that violates Kirchhoff's law of thermal radiation exhibits an inequality in its spectral directional absorptivity and emissivity. Achieving such an inequality is of fundamental interest as well as a prerequisite for achieving thermodynamic limits in photonic energy conversion1 and radiative cooling2. Thus far, inequalities in the spectral directional emissivity and absorptivity have been limited to narrow spectral resonances3, or wavelengths well beyond the infrared regime4. Bridging the gap from basic demonstrations to practical applications requires control over a broad spectral range of the unequal spectral directional absorptivity and emissivity. In this work, we demonstrate broadband nonreciprocal thermal emissivity and absorptivity by measuring the thermal emissivity and absorptivity of gradient epsilon-near-zero InAs layers of subwavelength thicknesses (50 nm and 150 nm) with an external magnetic field. The effect occurs in a spectral range (12.5-16 μm) that overlaps with the infrared transparency window and is observed at moderate (1 T) magnetic fields.","PeriodicalId":18093,"journal":{"name":"Light, science & applications","volume":"13 1","pages":"176"},"PeriodicalIF":19.4,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11269630/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141759605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0