检索结果-南通市图书馆

Direct laser writing of volumetric gradient index lenses and waveguides

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

light(Science & Applications) 2020年第1期9卷 89-102页

作者： Christian R.Ocier Corey A.Richards Daniel A.Bacon-Brown Qing Ding Raman Kumar Tanner J.Garcia Jorik van de Groep Jung-Hwan Song Austin J.Cyphersmith Andrew Rhode Andrea N.Perry Alexander J.littlefield Jinlong Zhu Dajie Xie Haibo Gao Jonah F.Messinger mark l.brongersma Kimani C.Toussaint Jr lynford l.Goddard Paul V.Braun Department of Materials Science and Engineering University of Illinois at Urbana-ChampaignUrbanaILUSA Materials Research laboratory University of Illinois at Urbana-ChampaignUrbanaILUSA Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-ChampaignUrbanaILUSA Department of Electrical and Computer Engineering University of Illinois at Urbana-ChampaignUrbanaILUSA Department of Materials Science and Engineering Stanford UniversityStanfordCAUSA Carl R.Woese Institute for Genomic Biology University of Illinois at Urbana-ChampaignUrbanaILUSA Department of Mechanical Science and Engineering University of Illinois at Urbana-ChampaignUrbanaILUSA

Direct laser writing(DlW)has been shown to render 3D polymeric optical components,including lenses,beam expanders,and mirrors,with submicrometer ***,these printed structures are limited to the refractive index and dispersive properties of the ***,we present the subsurface controllable refractive index via beam exposure(SCRIBE)method,a lithographic approach that enables the tuning of the refractive index over a range of greater than 0.3 by performing DlW inside photoresist-filled nanoporous silicon and silica *** the laser exposure during printing enables 3D submicron control of the polymer infilling and thus the refractive index and chromatic *** SCRIBE’s unprecedented index range and 3D writing accuracy has realized the world’s smallest(15μm diameter)spherical luneburg lens operating at visible ***’s ability to tune the chromatic dispersion alongside the refractive index was leveraged to render achromatic doublets in a single printing step,eliminating the need for multiple photoresins and writing *** also has the potential to form multicomponent optics by cascading optical elements within a *** a demonstration,stacked focusing structures that generate photonic nanojets were fabricated inside porous ***,an all-pass ring resonator was coupled to a subsurface 3D *** measured quality factor of 4600 at 1550 nm suggests the possibility of compact photonic systems with optical interconnects that traverse multiple *** is uniquely suited for constructing such photonic integrated circuits due to its ability to integrate multiple optical components,including lenses and waveguides,without additional printed supports.

关键词： index refractive render

Electrifying the field of metasurface optics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Insights 2024年第4期3卷 5-8页

作者： Nicholas A.Güsken mark l.brongersma Geballe laboratory for Advanced Materials Stanford UniversityStanfordCalifornia 94305USA

The field of optics has developed sophisticated ways to manipulate the flow of light by polishing pieces of glass or molding shapes from *** emerging applications,including displays,sensors,imaging systems,and communication devices,are now demanding a more favorable size,weight,power,and cost(SWaP-C)for the optical components to create ultracompact optoelectronic *** is especially true when such systems are incorporated in wearables,drones,the internet of things(IoT),and point-of-care diagnostics where weight and size come at a *** need to miniaturize optical elements has propelled the field of metasurfaces^([1–5]),which has taught us how to create essentially planar optical elements by judiciously nanostructuring thin films of metal and semiconductor materials.

关键词： materials. optics field

Emerging role of A-kinase anchoring protein 5 signaling in reward circuit function

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2913-2914页

作者： William J.Flerlage mark l.Dell’Acqua Brian M.Cox Fereshteh S.Nugent Uniformed Services University of the Health Sciences Department of Pharmacology and Molecular TherapeuticsBethesdaMDUSA Department of Pharmacology University of Colorado School of MedicineAnschutz Medical CampusAuroraCOUSA

There is a strong evidence supporting the hypothesis of synaptic dysfunction as a major contributor to neural circuit and network disruption underlying emotional and mood dysregulation in psychiatric disorders(Simmons et al.,2024).Diverse sets of distinct molecular signaling pathways converge on the synapse to regulate synaptogenesis,synaptic function,and synaptic plasticity in brain regions and circuits through complex interactions organized by numerous multivalent protein scaffolds,including the family of proteins known as A-kinase anchoring proteins(AKAPs).

关键词： function supporting

Multifunctional interleaved geometric-phase dielectric metasurfaces

在线全文

学校读者我要写书评

暂无评论

light(Science & Applications) 2017年第1期6卷 668-674页

作者： Elhanan Maguid Igor Yulevich Michael Yannai Vladimir Kleiner mark l.brongersma Erez Hasman Micro and Nanooptics laboratory Faculty of Mechanical Engineeringand Russell Berrie Nanotechnology InstituteTechnion-Israel Institute of TechnologyHaifa 32000Israel Geballe laboratory for Advanced Materials Stanford University476 Lomita MallStanfordCA 94305USA

Shared-aperture technology for multifunctional planar systems,performing several simultaneous tasks,was first introduced in the field of radar *** photonics,effective control of the electromagnetic response can be achieved by a geometric-phase mechanism implemented within a metasurface,enabling spin-controlled phase *** synthesis of the shared-aperture and geometric-phase concepts facilitates the generation of multifunctional *** shared-aperture geometric-phase metasurfaces were realized via the interleaving of sparse antenna sub-arrays,forming Si-based devices consisting of multiplexed geometric-phase *** study the performance limitations of interleaved nanoantenna arrays by means of a Wigner phasespace distribution to establish the ultimate information capacity of a metasurface-based photonic *** these limitations,we present multifunctional spin-dependent dielectric metasurfaces,and demonstrate multiple-beam technology for optical rotation *** also demonstrate the possibility of achieving complete real-time control and measurement of the fundamental,intrinsic properties of light,including frequency,polarization and orbital angular momentum.

关键词： geometric phase metasurface multifunctional shared aperture spectropolarimetry spin-optics Wigner distribution

Metal-dielectric-metal plasmonic waveguide devices for manipulating light at the nanoscale

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics letters 2009年第4期7卷 302-308页

作者： Georgios Veronis Zongfu Yu Sukru Ekin Kocaba David A. B. Miller mark l. brongersma Shanhui Fan Department of Electrical and Computer Engineering and Center for Computation and Technology Louisiana State University Baton Rouge LA 70803 USA Ginzton laSoratory Stanford University Stanford CA 94305 USA GeSalle laSoratory of Advanced Materials Stanford University Stanford CA 94305 USA

We review some of the recent advances in the development of subwavelength plasmonic devices for manipulating light at the nanoseale, drawing examples from our own work in metal-dielectric-metal （MDM） plasmonic waveguide devices. We introduce bends, splitters, and mode converters for MDM waveguides with no additional loss. We also demonstrate that optical gain provides a mechanism for on/off switching in MDM plasmonic waveguides. Highly efficient compact couplers between dielectric waveguides and MDM waveguides are also introduced.

关键词： Metals Multiplexing Nanotechnology Optical waveguides Plasmons Waveguide components Waveguides

超表面驱动OlED显示屏每英寸超10000像素

在线全文

学校读者我要写书评

暂无评论

家电科技 2021年第3期3卷 18-18页

作者： Won-Jae Joo Jisoo Kyoung Majid Esfandyarpour Sung-Hoon lee Hyun Koo Sunjin Song Young-Nam Kwon Seok Ho Song Jun Cheol Bae Ara Jo MyongJong Kwon Sung Hyun Han Sung-Han Kim Sungwoo Hwang mark l.brongersma 不详

光学表面材料被广泛集成于设备中。可以增强和控制光波的发射、调制、动态整形和检测。在相关研究中,《科学》报道了有机发光二极管(OlED)显示器的体系结构可以通过引入纳米图案的超表面反射镜得以实现。在最终的meta-OlED显示器中,不同... 详细信息

光学表面材料被广泛集成于设备中。可以增强和控制光波的发射、调制、动态整形和检测。在相关研究中,《科学》报道了有机发光二极管(OlED)显示器的体系结构可以通过引入纳米图案的超表面反射镜得以实现。在最终的meta-OlED显示器中,不同的metasurface图案定义了红色、绿色和蓝色的像素,并确保从有机白色发光体中优化提取这些颜色。这种新的体系结构有助于创建使用可缩放纳米压印光刻技术的新兴显示应用程序(例如虚拟现实)所需的超高像素密度(每英寸>10000像素)设备。相对于标准的彩色滤光白色OlED,超表面驱动的OlED显示屏所制造的像素具有两倍的发光效率和出色的色纯度。

关键词：虚拟现实应用程序 OlED显示屏发光体光学表面色纯度发光效率像素

X-ray scattering from liquid interfaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2006年第6期17卷 322-333页

作者： lI Ming mark l. SCHlOSSMAN Beijing National laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China Departments of Physics and Chemistry University of Illinois at Chicago 845 W. Taylor St Chicago IL 60607 USA

Synchrotron radiation X-ray scattering is a useful tool for structural characterization of liquid interfaces. Specular reflectivity provides precise measurement of the interfacial widths and of the ordering of surfactants adsorbed to these interfaces. Diffuse scattering gives information on phase transitions and domain formation in surfactant monolayers and on interfacial fluctuations confined by and coupled across fluidic films.

关键词： X-射线散射液体界面同步加速器反射率

Social interactions in a solitary carnivore

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2017年第4期63卷 357-362页

作者： l. mark ElBROCH Howard QUIGlEY Panthera 8 West 40th Street 18th Floor New York NY 10018 USA

In total, 177 of 245 terrestrial carnivores are described as solitary, and much of carnivore ecology is built on the assumptions that interactions between adult solitary carnivores are rare. We employed Global Positioning System （GPS） technology and motion-triggered cameras to test predictions of land-tenure territoriality and the resource dispersion hypothesis in a territorial carnivore, the puma Puma concolor. We documented 89 independent GPS interactions, 60% of which occurred at puma kills （n=53）, 59 camera interactions, 11 （17%） of which captured courtship behaviors, and 5 other interactions （1 F-F, 3 M-F, and 1 M-M）. Mean minimum weekly contact rates were 5.5 times higher in winter, the season when elk Cervus elaphus were aggregated at lower elevations and during which puma courtship primarily occurred. In winter, contacts rates were 0.6_＋ 0.3 （standard devi- ation （SD）） interactions/week vs. 0.1 _＋ 0.1 （SD） interactions/week during summer. The preponder- ance of interactions at food sources supported the resource dispersion hypothesis, which predicts that resource fluxes can explain temporary social behaviors that do not result in any apparent benefits for the individuals involved. Conspecific tolerance is logical when a prey is so large that the predator that killed it cannot consume it entirely, and thus, the costs of tolerating a conspecific sharing the kill are less than the potential costs associated with defending it and being injured. Puma aggregations at kills numbered as high as 9, emphasizing the need for future research on what explains tolerance among solitary carnivores.

关键词： carnivores competition Puma concolor resource dispersion hypothesis social interactions tolerance.

Do concentrations in eggs and liver tissue tell the same story of temporal trends of mercury in high Arctic seabirds?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2018年第6期30卷 65-72页

作者： mark l.Mallory Birgit M.Braune Biology Department Acadia University Environment and Climate Change Canada National Wildlife Research Centre Carleton University

Mercury（Hg） remains a key contaminant of concern in Arctic biota, and monitoring of Hg concentrations in seabird tissues will be an effective approach to track the effects of implementing the Minamata Convention. We examined trends in total Hg（THg） in liver and egg tissues of two Arctic seabirds, thick-billed murres（Uria lomvia） and northern fulmars（Fulmarus glacialis）, between 1976 and 2013 to assess whether both tissues showed similar patterns of Hg change. Hepatic THg was consistently higher than egg THg, and both species had similar egg THg concentrations, but fulmars had higher hepatic THg than *** THg concentrations showed more relative variation through time than *** suggest that egg THg better reflects exposure of birds to THg in local, Arctic prey,whereas liver THg may incorporate longer term, year-round THg exposure. Additional analysis of THg distribution in Arctic seabirds post-laying would help inform interpretation of long-term trends.

关键词： Canada Fulmarus glacialis Northern fulmar Thick-billed murre Uria lomvia