Nature Photonics最新文献_第9页

Nonlinear processing with linear optics 线性光学非线性处理

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-07-31 DOI: 10.1038/s41566-024-01494-z

Mustafa Yildirim, Niyazi Ulas Dinc, Ilker Oguz, Demetri Psaltis, Christophe Moser

{"title":"Nonlinear processing with linear optics","authors":"Mustafa Yildirim, Niyazi Ulas Dinc, Ilker Oguz, Demetri Psaltis, Christophe Moser","doi":"10.1038/s41566-024-01494-z","DOIUrl":"10.1038/s41566-024-01494-z","url":null,"abstract":"Deep neural networks have achieved remarkable breakthroughs by leveraging multiple layers of data processing to extract hidden representations, albeit at the cost of large electronic computing power. To enhance energy efficiency and speed, the optical implementation of neural networks aims to harness the advantages of optical bandwidth and the energy efficiency of optical interconnections. In the absence of low-power optical nonlinearities, the challenge in the implementation of multilayer optical networks lies in realizing multiple optical layers without resorting to electronic components. Here we present a novel framework that uses multiple scattering, and which is capable of synthesizing programmable linear and nonlinear transformations concurrently at low optical power by leveraging the nonlinear relationship between the scattering potential, represented by data, and the scattered field. Theoretical and experimental investigations show that repeating the data by multiple scattering enables nonlinear optical computing with low-power continuous-wave light. Moreover, we empirically find that scaling of this optical framework follows a power law. Multiple scattering capable of synthesizing programmable linear and nonlinear transformations concurrently at low optical power in the order of milliwatts continuous-wave power for optical computing is demonstrated, paving the way for ultra-efficient, low-power all-optical neural networks.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":null,"pages":null},"PeriodicalIF":32.3,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41566-024-01494-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141857602","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

Suppressed ion migration for high-performance X-ray detectors based on atmosphere-controlled EFG-grown perovskite CsPbBr3 single crystals 基于大气控制 EFG 生长的包晶 CsPbBr3 单晶的高性能 X 射线探测器的离子迁移抑制技术

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-07-29 DOI: 10.1038/s41566-024-01480-5

Yunqiu Hua, Guodong Zhang, Xue Sun, Peng Zhang, Yingying Hao, Yadong Xu, Yujie Yang, Qianqian Lin, Xiang Li, Zhongjun Zhai, Fucai Cui, Hongjie Liu, Jiaxin Liu, Xutang Tao

{"title":"Suppressed ion migration for high-performance X-ray detectors based on atmosphere-controlled EFG-grown perovskite CsPbBr3 single crystals","authors":"Yunqiu Hua, Guodong Zhang, Xue Sun, Peng Zhang, Yingying Hao, Yadong Xu, Yujie Yang, Qianqian Lin, Xiang Li, Zhongjun Zhai, Fucai Cui, Hongjie Liu, Jiaxin Liu, Xutang Tao","doi":"10.1038/s41566-024-01480-5","DOIUrl":"10.1038/s41566-024-01480-5","url":null,"abstract":"Halide perovskites have shown great potential for X-ray detection in medical imaging and product inspection applications. However, the ion migration in perovskites causes large noise and baseline drift, deteriorating the X-ray detection and imaging performance. Here we adopt the atmosphere-controlled edge-defined film-fed growth (EFG) method to grow high-quality shape-controlled CsPbBr3 single crystals (SCs) in an Ar and HBr mixed atmosphere. Compared with the vertical Bridgman (VB)-CsPbBr3 SCs, the EFG-CsPbBr3 SCs show a much lower trap density, a higher resistivity (1.61 × 1010 Ω cm) and a larger ion migration activation energy (0.378 eV), decreasing the leakage current and baseline drift. An X-ray detector based on EFG-CsPbBr3 SCs hence exhibits outstanding balanced performance, with a negligible dark-current drift of 1.68 × 10−9 μA cm−1 s−1 V−1, an incredibly low detection limit of 10.81 nGyair s−1 and a sensitivity of 46,180 μC Gyair−1 cm−2 under a high electric field of 5,000 V cm−1. Furthermore, the detector maintains a stable response for 30 days. Our work provides an effective strategy to improve lead-halide perovskite SCs for high-performance X-ray detection and imaging. The researchers improve the properties of halide perovskite for high-performance X-ray detection by edge-defined film-fed crystal growth. In particular, high resistivity, low trap density, suppressed ion migration and reduced leakage current are demonstrated. They enable detectors with an extremely low detection limit and high sensitivity.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":null,"pages":null},"PeriodicalIF":32.3,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141790959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}

引用次数: 0

Retraction Note: Luminescent solar concentrator efficiency enhanced via nearly lossless propagation pathways 撤稿说明：通过近乎无损的传播途径提高发光太阳能聚光器的效率

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-07-25 DOI: 10.1038/s41566-024-01502-2

Kyoungwon Park, Jeongmin Yi, Suk-Young Yoon, Seong Min Park, Jiyong Kim, Hyun-Beom Shin, Swarup Biswas, Gang Yeol Yoo, Sang-Hwa Moon, Jiwan Kim, Min Suk Oh, Armin Wedel, Sohee Jeong, Hyeok Kim, Soong Ju Oh, Ho Kwan Kang, Heesun Yang, Chul Jong Han

引用次数: 0

Author Correction: High gradient terahertz-driven ultrafast photogun 作者更正：高梯度太赫兹驱动超快光枪

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-07-22 DOI: 10.1038/s41566-024-01503-1

Jianwei Ying, Xie He, Dace Su, Lingbin Zheng, Tobias Kroh, Timm Rohwer, Moein Fakhari, Günther H. Kassier, Jingui Ma, Peng Yuan, Nicholas H. Matlis, Franz X. Kärtner, Dongfang Zhang

引用次数: 0

In situ nanoscopy of single-grain nanomorphology and ultrafast carrier dynamics in metal halide perovskites 原位纳米透视金属卤化物过氧化物中的单晶粒纳米形态和超快载流子动力学

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-07-17 DOI: 10.1038/s41566-024-01476-1

M. Zizlsperger, S. Nerreter, Q. Yuan, K. B. Lohmann, F. Sandner, F. Schiegl, C. Meineke, Y. A. Gerasimenko, L. M. Herz, T. Siday, M. A. Huber, M. B. Johnston, R. Huber

{"title":"In situ nanoscopy of single-grain nanomorphology and ultrafast carrier dynamics in metal halide perovskites","authors":"M. Zizlsperger, S. Nerreter, Q. Yuan, K. B. Lohmann, F. Sandner, F. Schiegl, C. Meineke, Y. A. Gerasimenko, L. M. Herz, T. Siday, M. A. Huber, M. B. Johnston, R. Huber","doi":"10.1038/s41566-024-01476-1","DOIUrl":"10.1038/s41566-024-01476-1","url":null,"abstract":"Designing next-generation light-harvesting devices requires a detailed understanding of the transport of photoexcited charge carriers. The record-breaking efficiencies of metal halide perovskite solar cells have been linked to effective charge-carrier diffusion, yet the exact nature of charge-carrier out-of-plane transport remains notoriously difficult to explain. The characteristic spatial inhomogeneity of perovskite films with nanograins and crystallographic disorder calls for the simultaneous and hitherto elusive in situ resolution of the chemical composition, the structural phase and the ultrafast dynamics of the local out-of-plane transport. Here we simultaneously probe the intrinsic out-of-plane charge-carrier diffusion and the nanoscale morphology by pushing depth-sensitive terahertz near-field nanospectroscopy to extreme subcycle timescales. In films of the organic–inorganic metal halide perovskite FA0.83Cs0.17Pb(I1−xClx)3 (where FA is formamidinium), domains of the cubic α-phase are clearly distinguished from the trigonal δ-phase and PbI2 nano-islands. By analysing deep-subcycle time shifts of the scattered terahertz waveform after photoexcitation, we access the vertical charge-carrier dynamics within single grains. At all of the measured locations, despite topographic irregularities, diffusion is surprisingly homogeneous on the 100 nm scale, although it varies between mesoscopic regions. Linking in situ carrier transport with nanoscale morphology and chemical composition could introduce a paradigm shift for the analysis and optimization of next-generation optoelectronics that are based on nanocrystalline materials. Transient visible-pump terahertz-probe near-field microscopy enables the simultaneous retrieval of the local chemical composition, crystallographic structure, topography and out-of-plane charge-carrier diffusion in perovskite films.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":null,"pages":null},"PeriodicalIF":32.3,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141631432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}

引用次数: 0

Revealing the three-dimensional structure of microbunched plasma-wakefield-accelerated electron beams 揭示微束等离子渚射加速电子束的三维结构

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-07-15 DOI: 10.1038/s41566-024-01475-2

Maxwell LaBerge, Brant Bowers, Yen-Yu Chang, Jurjen Couperus Cabadağ, Alexander Debus, Andrea Hannasch, Richard Pausch, Susanne Schöbel, Jessica Tiebel, Patrick Ufer, Anna Willmann, Omid Zarini, Rafal Zgadzaj, Alex H. Lumpkin, Ulrich Schramm, Arie Irman, M. C. Downer

{"title":"Revealing the three-dimensional structure of microbunched plasma-wakefield-accelerated electron beams","authors":"Maxwell LaBerge, Brant Bowers, Yen-Yu Chang, Jurjen Couperus Cabadağ, Alexander Debus, Andrea Hannasch, Richard Pausch, Susanne Schöbel, Jessica Tiebel, Patrick Ufer, Anna Willmann, Omid Zarini, Rafal Zgadzaj, Alex H. Lumpkin, Ulrich Schramm, Arie Irman, M. C. Downer","doi":"10.1038/s41566-024-01475-2","DOIUrl":"10.1038/s41566-024-01475-2","url":null,"abstract":"Plasma wakefield accelerators use tabletop equipment to produce relativistic femtosecond electron bunches. Optical and X-ray diagnostics have established that their charge concentrates within a micrometre-sized volume, but its sub-micrometre internal distribution, which critically influences gain in free-electron lasers or particle yield in colliders, has proven elusive to characterize. Here, by simultaneously imaging different wavelengths of coherent optical transition radiation that a laser-wakefield-accelerated electron bunch generates when exiting a metal foil, we reveal the structure of the coherently radiating component of bunch charge. The key features of the images are shown to uniquely correlate with how plasma electrons injected into the wake: by a plasma-density discontinuity, by ionizing high-Z gas-target dopants or by uncontrolled laser–plasma dynamics. With additional input from the electron spectra, spatially averaged coherent optical transition radiation spectra and particle-in-cell simulations, we reconstruct coherent three-dimensional charge structures. The results demonstrate an essential metrology for next-generation compact X-ray free-electron lasers driven by plasma-based accelerators. Imaging the visible light emitted from accelerated electron bunches reveals important information about the three-dimensional charge structure of the bunches, which strongly influences the performance of free-electron lasers.","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":null,"pages":null},"PeriodicalIF":32.3,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41566-024-01475-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141625103","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

The X-ray science frontier is ultra-short and ultra-intense 超短、超强的 X 射线科学前沿

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-07-08 DOI: 10.1038/s41566-024-01471-6

Sam M. Vinko

引用次数: 0

Optical frequency comb for multi-sensors 用于多传感器的光学频率梳

IF 32.3 1区物理与天体物理

Nature Photonics Pub Date : 2024-07-08 DOI: 10.1038/s41566-024-01464-5

Noriaki Horiuchi

引用次数: 0

Fast and furious X-ray free-electron lasers 迅猛的 X 射线自由电子激光器