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Ramsey interferometry with cold atoms in coherent population trapping 拉姆齐干涉测量法与相干群体捕获中的冷原子
IF 6 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-02-23 DOI: 10.1080/23746149.2024.2317896
Chengyin Han, Bo Lu, Chaohong Lee
The utilization of Ramsey interferometry via coherent population trapping (CPT), which enables the optical interrogation of microwave transitions without the reliance on microwave cavities, plays a...
通过相干群体陷波(CPT)利用拉姆齐干涉测量法,可以在不依赖微波腔的情况下对微波跃迁进行光学探测。
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引用次数: 0
High-resolution correlative imaging in ultrafast electron microscopy 超快电子显微镜的高分辨率关联成像
IF 6 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-02-18 DOI: 10.1080/23746149.2024.2316710
Ye-Jin Kim, Won-Woo Park, Hak-Won Nho, Oh-Hoon Kwon
Ultrafast electron microscopy (UEM) has a broad scope of application across material systems and scientific disciplines. In UEM, we investigate multiscale dynamics in the spatial domain ranging fro...
超快电子显微镜(UEM)在材料系统和科学学科中有着广泛的应用。在超快电子显微镜中,我们研究空间领域的多尺度动态,包括...
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引用次数: 0
Recent Advancements in Nanophotonics for Optofluidics. 光流体纳米光子学的最新进展。
IF 10.8 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2024-01-01 Epub Date: 2024-10-22 DOI: 10.1080/23746149.2024.2416178
Sen Yang, Chuchuan Hong, Guodong Zhu, Theodore Anyika, Ikjun Hong, Justus C Ndukaife

Optofluidics is dedicated to achieving integrated control of particle and fluid motion, particularly on the micrometer scale, by utilizing light to direct fluid flow and particle motion. The field has seen significant growth recently, driven by the concerted efforts of researchers across various scientific disciplines, notably for its successful applications in biomedical science. In this review, we explore a range of optofluidic architectures developed over the past decade, with a primary focus on mechanisms for precise control of micro and nanoscale biological objects and their applications in sensing. Regarding nanoparticle manipulation, we delve into mechanisms based on optical nanotweezers using nanolocalized light fields and light-based hybrid effects with dramatically improved performance and capabilities. In the context of sensing, we emphasize those works that used optofluidics to aggregate molecules or particles to promote sensing and detection. Additionally, we highlight emerging research directions, encompassing both fundamental principles and practical applications in the field.

光流体技术致力于利用光来引导流体流动和粒子运动,从而实现对粒子和流体运动的综合控制,特别是在微米尺度上。在各学科研究人员的共同努力下,该领域近来取得了长足的发展,尤其是在生物医学领域的成功应用。在这篇综述中,我们将探讨过去十年间开发的一系列光流体架构,主要关注微米和纳米级生物物体的精确控制机制及其在传感领域的应用。在纳米粒子操纵方面,我们深入研究了基于光学纳米镊子的机制,利用纳米定位光场和基于光的混合效应,显著提高了性能和能力。在传感方面,我们强调那些利用光流体技术聚合分子或粒子以促进传感和检测的研究成果。此外,我们还强调了新兴的研究方向,包括该领域的基本原理和实际应用。
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引用次数: 0
Strategies and challenges for improving the performance of two-dimensional materials-based gas sensors 提高二维材料气体传感器性能的策略与挑战
IF 6 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-12-07 DOI: 10.1080/23746149.2023.2288353
Yuan Xie, Zhe Zhang, Fanying Meng, Shida Huo, Xiaodong Hu, Pingjuan Niu, Enxiu Wu
Two-dimensional (2D) materials emerged in the last decade have been considered as an attractive class of gas sensing materials due to their large surface-to-volume ratio, high surface reaction acti...
过去十年中出现的二维(2D)材料因其较大的表面体积比、较高的表面反应活性和较低的成本而被认为是一类极具吸引力的气体传感材料。
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引用次数: 0
A time for change 是时候改变了
2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-11-06 DOI: 10.1080/23746149.2023.2269020
Plagues of the Desert Locust are occurring, on average, one year in every six. Highly mobile swarms may then threaten a vast territory stretching from Mauritania to India, and Turkmenistan to Tanzania. In the last ten years two major upsurges have occurred. Development agencies including the World Bank have assisted the control efforts of affected countries; financial assistance totaled some USS383 million over this period. This paper highlights a number of issues associated with these operations. One key question concerns the extent to which the rationale for control is based on a realistic assessment of the risks posed to agricultural production and livelihoods. At the same time, it appears that a lack of preparedness on the part of all major actors is contributing to the 'emergency' status of control operations. When operations are undertaken it is not clear that an effective technical strategy currently exists, or is being employed, given logistical, institutional and resource constraints. This is contributing to inefficiencies and increased environmental costs. Moreover, sustainable capacity is not being developed in most of the affected countries and donor dependence is high. Little agreement exists amongst the main parties affected countries, donors, and FAO (the lead agency) on how to deal with these problems. The paper contributes to the ongoing debate on these questions with several specific suggestions. A key proposal is that the strategy for control should shift from one which seeks to prevent an upsurge occurring (which has not been possible so far) to one that is closer to the integrated pest management (IPM) approach, where a variety of means are used to keep economic, social and environmental impacts below acceptable threshold limits. Initiatives are identified at national, regional and international levels. Donors can help affected countries in a number of ways through long term country assistance grants and loans, including assistance to develop improved policies, early warning systems, contingency plans and control strategies linked to environmental impact assessments. Not all countries can justify the expenditure on significant locust control capacity and the building of regional cooperative links is important; however these will only be sustainable if mechanisms are established to ensure long term financing by member countries. Gaps in critical minimum capacity, for example in key potential outbreak areas around the Red Sea, could be addressed through a collaborative regional effort to develop the requisite technologies, institutions and policies. The role of the international community is also discussed. Several measures are suggested to improve the speed of response should internationally coordinated control efforts be required. A key issue is the need to target assistance efforts effectively according to assessed needs; a related need is to improve the transparency of decision-making based on a set of agreed threshold crit
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引用次数: 0
Magneto-optical effects in lead halide perovskites 卤化铅钙钛矿中的磁光效应
2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-09-25 DOI: 10.1080/23746149.2023.2258951
Yan Lv, Yuxiao Wang, Xueying Ma, Yao Xu, Lin Wang, Xiaoyong Wang, Min Xiao, Chunfeng Zhang
Lead halide perovskites have emerged as promising semiconductors for high-performance photovoltaics, light-emitting devices as well as quantum information technologies. In this review, we highlight the magneto-optical effects in these materials from both fundamental research and practical application perspectives. We summarize the experimental results measured for basic physical quantities and the assignment of various spectral peaks using the magneto-optical spectroscopy. These results provide a solid foundation underlying the excellent photo-electronic properties of lead halide perovskites. Additionally, we provide an overview of carrier spin precession and its hyperfine interaction with the nuclear spin bath in response to the applied magnetic field, which is essential for developing perovskite-based spintronic devices. We also illustrate the magnetic-field effects in optoelectronic devices, aiming at providing instructions for performance optimization. Finally, we discuss several challenging research directions towards a comprehensive understanding of the perovskite family and their potential applications in quantum physics, which might be accessed with the magneto-optical techniques. Overall, this review highlights the intriguing possibilities for lead halide perovskites in magneto-optical research and technology, and provides insights for future investigations to advance this promising field.
卤化铅钙钛矿已成为高性能光伏,发光器件以及量子信息技术的有前途的半导体。本文从基础研究和实际应用两方面综述了这些材料的磁光效应。总结了磁光光谱法测量基本物理量的实验结果和各种光谱峰的分配。这些结果为卤化铅钙钛矿优异的光电性能提供了坚实的基础。此外,我们还概述了载流子自旋进动及其与核自旋浴的超精细相互作用对外加磁场的响应,这对于开发基于钙钛矿的自旋电子器件至关重要。我们还举例说明了光电器件中的磁场效应,旨在为性能优化提供指导。最后,我们讨论了几个具有挑战性的研究方向,以全面了解钙钛矿家族及其在量子物理中的潜在应用,这些应用可能通过磁光技术获得。总的来说,这篇综述强调了卤化铅钙钛矿在磁光研究和技术中的有趣可能性,并为未来的研究提供了见解,以推进这一有前途的领域。
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引用次数: 0
Lattice-Boltzmann modelling for inertial particle microfluidics applications - a tutorial review 惯性粒子微流体应用的晶格-玻尔兹曼建模-教程综述
2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-09-24 DOI: 10.1080/23746149.2023.2246704
Benjamin Owen, Konstantinos Kechagidis, Sajad Razavi Bazaz, Romain Enjalbert, Erich Essmann, Calum Mallorie, Fatemehsadat Mirghaderi, Christian Schaaf, Krishnaveni Thota, Rohan Vernekar, Qi Zhou, Majid Ebrahimi Warkiani, Holger Stark, Timm Krüger
Inertial particle microfluidics (IPMF) is an emerging technology for the manipulation and separation of microparticles and biological cells. Since the flow physics of IPMF is complex and experimental studies are often time-consuming or costly, computer simulations can offer complementary insights. In this tutorial review, we provide a guide for researchers who are exploring the potential of the lattice-Boltzmann (LB) method for simulating IPMF applications. We first review the existing literature to establish the state of the art of LB-based IPMF modelling. After summarising the physics of IPMF, we then present related methods used in LB models for IPMF and show several case studies of LB simulations for a range of IPMF scenarios. Finally, we conclude with an outlook and several proposed research directions.
惯性微粒微流控技术是一种用于微粒和生物细胞的操作和分离的新兴技术。由于IPMF的流动物理是复杂的,实验研究往往是耗时或昂贵的,计算机模拟可以提供补充的见解。在本教程综述中,我们为正在探索晶格-玻尔兹曼(LB)方法在模拟IPMF应用中的潜力的研究人员提供了指南。我们首先回顾了现有文献,以建立基于lb的IPMF模型的最新状态。在总结了IPMF的物理特性之后,我们介绍了用于IPMF的LB模型的相关方法,并展示了一系列IPMF场景下LB模拟的几个案例研究。最后,对本文的研究进行了展望,并提出了今后的研究方向。
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引用次数: 0
External-field regulated superatoms 外部场调节超级原子
IF 6 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-08-11 DOI: 10.1080/23746149.2023.2244541
Si-Qi Liu, Delong Li, Jun Li, Hao Wang, Yun-Ting Bu, Jie Su, J. Chen, Shibo Cheng
ABSTRACT As a special class of stable atomic clusters, the superatom has become an exciting research topic in recent decades. They can mimic the chemistry and physics of individual atoms in the periodic table and find potential applications in a variety of fields. Traditional strategies for superatom design, however, have their own limitations. Herein, we review recent progress in the discovery of novel methodologies for superatom design, namely external-field regulated strategies (EFRS). We begin with a description of the basic concept of the superatom and the conventional electron-counting rules for superatom design, followed by a discussion of recent exploration about external-field regulated superatoms, where the oriented external electric field (OEEF), the ligand field, and the solvent field are presented. In the concluding section, we discuss the benefits and challenges of the EFRS together with some future research topics.
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引用次数: 0
Melting of atomic materials under high pressures using computer simulations 原子材料在高压下熔化的计算机模拟
IF 6 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-07-30 DOI: 10.1080/23746149.2023.2235060
Diana Yu, E. Pahl
ABSTRACT Enormous progress has been made in high-pressure research over the last decades in both, experiments and computer simulations, many challenges still remain. This is evidenced by controversial experimental and numerical data even for the simplest atomic systems exhibiting different types of bonding. Here we discuss the determination of the solid–liquid co-existence (melting) lines reviewing the computational techniques for studying the high-pressure melting of atomic systems based on molecular dynamic or Monte Carlo algorithms. Some emphasis is put on presenting the parallel-tempering Monte Carlo method that gives direct access to heat capacity curves and entropic information as a function of temperature allowing for an easy detection and interpretation of the melting transition. For molecular dynamics simulations there exist a variety of methods to extract melting information – here we include a more thorough discussion of thermodynamic integration as it is frequently used for high-pressure melting. Applications of these techniques and discussion for different atomic systems are presented including an overview of experimental and numerical results of the weakly, van-der-Waals bond noble gases, of diamond as a representative for covalent bonding and of alkali metals and iron. We conclude by summarizing some outstanding problems and challenges for numerical simulations.
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引用次数: 0
Disordered optical metasurfaces: from light manipulation to energy harvesting 无序光学超表面:从光操纵到能量收集
IF 6 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Pub Date : 2023-07-20 DOI: 10.1080/23746149.2023.2234136
Zixian Hu, Changxu Liu, Gui-Jun Li
ABSTRACT Metasurfaces, the planar version of artificial structured media at sub-wavelength scale, provide the ability to manipulate light wave in a naturally unavailable way. They offer an unprecedented platform for a plethora of applications ranging from holography, imaging, optical communication to nonlinear light source and quantum computing. Conventionally and straightforwardly, metasurfaces are prepared in ordered configuration, aiming at reducing the geometric fluctuations to guarantee a good performance as designed. On the other hand, the inevitability of fabrication imperfection in nanophotonics and unique properties of disorder have been inspiring the exploration of the metasurfaces with novel design. To supplement the comprehensiveness in review for metasurfaces, here, we overview the mechanisms, characteristics and related applications of disordered metasurfaces, concentrating on recent progresses from light manipulation to energy harvesting and beyond. Besides reviewing the achievements in a wide range of applications with disordered metasurface, we provide an outlook on their future developments. With unique features, disordered metasurface may be a promising alternative for the ordered ones, especially for the practical requirement for large-scale production.
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引用次数: 1
期刊
Advances in Physics: X
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