Nanoengineering: Fabrication, Properties, Optics, and Devices XV最新文献

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-10-08 DOI: 10.1117/12.2515524

Mary Bentley

引用次数: 0

Nonlinear absorption and nonlinear refractive index of 2D transition metal dichalcogenides (Conference Presentation) 二维过渡金属二硫化物的非线性吸收和非线性折射率(会议报告)

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-09-18 DOI: 10.1117/12.2319922

Jun Wang

引用次数: 1

Three dimensional Luneburg lens at optical frequencies achieved by laser direct writing technique (Conference Presentation) 激光直写技术实现光学频率的三维鲁讷堡透镜(会议报告)

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-09-18 DOI: 10.1117/12.2321063

X. Duan, Meiling Zheng

{"title":"Three dimensional Luneburg lens at optical frequencies achieved by laser direct writing technique (Conference Presentation)","authors":"X. Duan, Meiling Zheng","doi":"10.1117/12.2321063","DOIUrl":"https://doi.org/10.1117/12.2321063","url":null,"abstract":"Luneburg lens is a fascinating gradient refractive index (GRIN) lens that can focus parallel light rays on a perfect geometrical point without aberration in geometrical optics, compared with conventional lens made of homogeneous dielectric materials with specially designed surfaces. Constructing a three dimensional (3D) Luneburg lens at optical frequencies is a challenging task due to the difficulty of fabricating the desired GRIN materials in the lab. Reported experimental realizations of Luneburg lens at optical frequencies are mainly based on two dimensional metamaterials structures, or plasmonic structures. Here, we present the first practical implementation of the 3D version of Luneburg lens at optical frequencies based on the effective medium approximation. The 3D Luneburg lens is designed with GRIN 3D simple cubic metamaterials (SCMs) structures, and fabricated with no-resonant dielectric metamaterials by laser direct writing method in the commercial negative photoresist IP-L. We have experimentally demonstrated the feasibility of tailoring inhomogeneous metamaterials structures to realize 3D Luneburg lens with the effective GRIN profiles. The effective refractive index has been spatially and gradually modified by tailoring the volume filling fraction of SCMs structures. Simulated and experimental results simultaneously exhibit interesting 3D ideal focusing performance of the 3D Luneburg lens for the infrared light at wavelengths of 6.25m. This study would provide the protocol for developing the 3D Luneburg lens with wide field-of-view and ideal focusing theoretically and experimentally, which would further prompt the potential applications in integrated light-coupled devices and lab-on-chip integrated biological sensors based on infrared light.","PeriodicalId":307548,"journal":{"name":"Nanoengineering: Fabrication, Properties, Optics, and Devices XV","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124638849","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

Self assembled polymer nanocomposites for stimuli-interactive sensing display (Conference Presentation) 用于刺激交互传感显示的自组装聚合物纳米复合材料(会议报告)

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-09-18 DOI: 10.1117/12.2322955

Cheolmin Park

{"title":"Self assembled polymer nanocomposites for stimuli-interactive sensing display (Conference Presentation)","authors":"Cheolmin Park","doi":"10.1117/12.2322955","DOIUrl":"https://doi.org/10.1117/12.2322955","url":null,"abstract":"Development of stimuli-interactive sensing display capable of spontaneously visualizing various external human sensible inputs has been of great interest and tremendous efforts are devoted to the visualization of nonvisible human senses such as touch, smell, taste, and sound. Field induced electroluminescence of either organic or inorganic fluorescent materials under alternating current (AC) has been extensively studied and its unique device architecture in which an emitting layer is separated with an insulator from electrode offers a new platform for designing and developing emerging stimuli-interactive displays. In this presentation, high-performance field-induced AC polymer electroluminescence (AC-PEL) devices are demonstrated with high brightness, high efficiency and color and intensity-tunability. We also present a pressure interactive AC display sensor that allows for both sensing and visualisation of pressure. Light emission upon exposure to an AC field between two electrodes is controlled by the capacitance change of the insulator arising from the pressure applied on top. Besides capacitive pressure sensing, our EL sensor allows for direct visualisation of the static and dynamic information of position, shape, and size of a pressurising object on a non-pixelated single device platform. Finally, the presentation shows that simultaneous sensing and visualization of the conductive substance is achieved when the conductive object is coupled with the light emissive material layer on our novel parallel-type AC-PEL device. A variety of conductive materials can be detected regardless of their work functions, and thus information written by a conductive pen is visualized, as is a human fingerprint with natural conductivity.","PeriodicalId":307548,"journal":{"name":"Nanoengineering: Fabrication, Properties, Optics, and Devices XV","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129185974","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

Making 2D materials visible (Conference Presentation) 使二维材料可见(会议报告)

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-09-18 DOI: 10.1117/12.2321224

F. Huang, Matěj Velický, Gavin E. Donnelly, Joel M. Katzen, W. Hendren, R. Bowman

{"title":"Making 2D materials visible (Conference Presentation)","authors":"F. Huang, Matěj Velický, Gavin E. Donnelly, Joel M. Katzen, W. Hendren, R. Bowman","doi":"10.1117/12.2321224","DOIUrl":"https://doi.org/10.1117/12.2321224","url":null,"abstract":"Atomically-thin two-dimensional (2D) materials have attracted remarkable interest in a wide range of research and applications. However, one of the main challenges is how to visualise the extremely thin films and accurately identify its layer thickness. Due to the ultimately thin thickness and the low absorption of light, many 2D films, such as graphene, graphene oxide and hexagonal boron nitride (hBN) are nearly completely transparent on most surfaces. They are only visible when deposited on specific contrast-enhancing substrates. However, there is no universal substrates which can be used to visualise all 2D materials. A substrate often can only provide enhanced visibility for a specific category of 2D materials. For instance, the oxidised Si substrates can considerably enhance the optical contrast of graphene, but produce negligible enhancing effect on hBN. It is therefore desirable to develop a general theoretical guidance on how to design contrast-enhancing substrate for any given 2D materials. \u0000\u0000Here we report a universal theoretical model which can be employed to design high-contrast substrates for any 2D materials. For a given thin film of known optical properties, the optical contrast is completely defined by the complex reflectivity of the underlying substrate. By engineering the optical properties of the underlying substrate, we fabricated a range of structures, significantly enhancing the contrast of graphene, graphene oxides and hBN. Monolayers of these transparent 2D films are readily visible (>10% contrast) on a range of substrates with metallic or dielectric materials as top surface layers. The measured optical contrasts excellently match theoretical calculations.","PeriodicalId":307548,"journal":{"name":"Nanoengineering: Fabrication, Properties, Optics, and Devices XV","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114693451","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

Photomechanics: converting light-matter interactions in 2D nanomaterials into mechanical motion (Conference Presentation) 光电力学:将二维纳米材料中的光物质相互作用转化为机械运动(会议报告)

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-09-18 DOI: 10.1117/12.2326292

V. Rahneshin, Dominika A. Ziolkowska, M. Loeian, J. Jasinski, J. Cromwell, B. Panchapakesan

引用次数: 0

Fabrication of high aspect ratio silicon and diamond for x-ray optics (Conference Presentation) 用于x射线光学的高纵横比硅和金刚石的制备(会议报告)

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-09-18 DOI: 10.1117/12.2326000

Kenan Li

引用次数: 1

MoS2/Si and WS2/Si heterojunction photo-detectors fabricated by low-temperature plasma processes (Conference Presentation) 低温等离子体工艺制备MoS2/Si和WS2/Si异质结光电探测器(会议报告)

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-09-18 DOI: 10.1117/12.2320886

Soyeong Kwon, Dongrye Choi, Jungeun Song, Yonghun Kim, B. Cho, Dong-Wook Kim

{"title":"MoS2/Si and WS2/Si heterojunction photo-detectors fabricated by low-temperature plasma processes (Conference Presentation)","authors":"Soyeong Kwon, Dongrye Choi, Jungeun Song, Yonghun Kim, B. Cho, Dong-Wook Kim","doi":"10.1117/12.2320886","DOIUrl":"https://doi.org/10.1117/12.2320886","url":null,"abstract":"MoS2 and WS2 trilayers were grown on p-type Si wafers using atmospheric pressure plasma processes. Current-voltage measurements of MoS2/Si and WS2/Si heterojunctions showed rectifying behaviors, indicating formation of diodes. It should be noted that the very large shunt resistance indicated uniform MoS2 layer formation on the Si wafers. Relatively large dark current of the MoS2 and WS2 heterojunctions under reverse bias indicated the band to band tunneling and avalanche multiplication processes. Temperature dependence of the diode ideality factor was also studied to reveal the major recombination processes, based on conventional 3D semiconductor models. Photocurrent characteristics of the junctions were studied using green lasers (wavelength: 532 nm). Large photocurrent was observed under reverse bias, whereas photocurrent was negligibly small under forward bias. The measured photocurrent was linearly proportional to the laser power. This suggested that trapping and detrapping of the photo-generated carriers at interface defects and surface adsorbates did not much limit the collection of photo-carriers. Both MoS2/Si and WS2/Si heterojunctions showed fast photoresponse: the rising and decaying time constants were less than 0.1 ms. All these results showed that our processes could prepare high quality 2D/3D hybrid semiconductor heterojunctions with clean interfaces.","PeriodicalId":307548,"journal":{"name":"Nanoengineering: Fabrication, Properties, Optics, and Devices XV","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126737510","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

Atomic sculpture of graphene oxide (Conference Presentation) 氧化石墨烯的原子雕塑(会议报告)

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-09-18 DOI: 10.1117/12.2321184

Yuefeng Huang, Matěj Velický, Gavin E. Donnelly, Joel M. Katzen, W. Hendren, R. Bowman, F. Huang

{"title":"Atomic sculpture of graphene oxide (Conference Presentation)","authors":"Yuefeng Huang, Matěj Velický, Gavin E. Donnelly, Joel M. Katzen, W. Hendren, R. Bowman, F. Huang","doi":"10.1117/12.2321184","DOIUrl":"https://doi.org/10.1117/12.2321184","url":null,"abstract":"Photomechanics, i.e., the conversion of light into thermal and mechanical work is of significant importance for energy conversion/reconfigurable technologies. Advantages of such photo-thermal mechanisms for transducers include remote energy transfer, remote controllability, control of actuation using number of photons (intensity) and photon energies (wavelength), fast actuation (milliseconds), low signal to noise ratio, high stored elastic strain energy densities with hyperelastic elastomers and scalability at different length scales using batch fabrication and high-volume semiconductor manufacturing. However, only a few materials exist that can convert light into mechanical work. Azobenzene liquid crystal elastomers were one of the first materials to exhibit the photomechanical effect. However, their application required two different light sources for reversible thermal switching (420 nm and 365 nm) between an extended trans and a shorter cis configuration. In this talk, we will cover how light is used with new materials to create the mechanical effect. New nanomaterials, when mixed with polymeric materials, show the unusual photomechanical effect that can be practically harnessed for real-world application. Straining new 2D nanomaterials such as graphene, MoS2 and others creates a new effect called the coupled straintronic photo-thermic effect enables large light absorption and also increase in mechanical effect. The talk will go through an overview of this new and upcoming area of research based on light-matter interaction in 1D and 2D nanomaterial composites","PeriodicalId":307548,"journal":{"name":"Nanoengineering: Fabrication, Properties, Optics, and Devices XV","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128603953","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

Novel ZnO nanocones: enhanced electrochemical and optical performances (Conference Presentation) 新型ZnO纳米锥:增强的电化学和光学性能(会议报告)

Nanoengineering: Fabrication, Properties, Optics, and Devices XV Pub Date : 2018-09-18 DOI: 10.1117/12.2502793

Joonho Bae

引用次数: 0