High Contrast Metastructures VIII最新文献_第2页

Complex-birefringent waveplates with metasurfaces (Conference Presentation) 具有超表面的复合双折射波片(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2507931

Shaun Lung, Kai Wang, K. Z. Kamali, M. Rahmani, D. Neshev, A. Sukhorukov

{"title":"Complex-birefringent waveplates with metasurfaces (Conference Presentation)","authors":"Shaun Lung, Kai Wang, K. Z. Kamali, M. Rahmani, D. Neshev, A. Sukhorukov","doi":"10.1117/12.2507931","DOIUrl":"https://doi.org/10.1117/12.2507931","url":null,"abstract":"Conventional wave plates for polarization control are based on birefringent materials or nanostructures that assign real-valued phases [1,2]. Recently, a new regime of complex-valued birefringence was suggested [3], extending the notion of real-valued birefringence through the specially introduced polarization-sensitive loss or gain. However, this theoretical approach was based on a complicated metamaterial with loss and gain, which remains inaccessible for fabrication.\u0000\u0000We develop and experimentally demonstrate a practical approach for optimal implementation of complex-birefringent wave plates with metasurfaces. We design dielectric metasurfaces incorporating pairs of nanoresonators, giving rise to engineered polarization-dependent diffraction, which effectively introduces only the minimally necessary amount of loss to achieve the desired unconventional polarization transformation. \u0000\u0000We fabricate such metasurfaces, characterize the transmission of various polarization states, and demonstrate two representative applications. First, we show that a metasurface can transforms a pair of nearly identical polarization states into orthogonally polarized ones, which can be used for improving polarization detection sensitivity and quantum state discrimination. In contrast, real-valued birefringence cannot change the angle between pairs of polarization states. Second, we develop a metasurface implementing polarization coupling with an unconventional relative phase, which can strongly affect the quantum interference of photons and control their coherent attenuation.\u0000\u0000The complex-birefringent metasurfaces can facilitate novel types of polarization manipulation and measurement with optical beams and quantum photon states.\u0000\u0000[1] A. Arbabi et al., Nat. Nanotechnol. 10, 937 (2015).\u0000[2] S. Kruk et al., APL Photonics 1, 030801 (2016).\u0000[3] A. Cerjan and S. H. Fan, Phys. Rev. Lett. 118, 253902 (2017).","PeriodicalId":307226,"journal":{"name":"High Contrast Metastructures VIII","volume":"67 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130987857","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

Understanding the dynamics of light-meta structure interactions using skin-depth engineering (Conference Presentation) 利用皮肤深度工程理解光-元结构相互作用的动力学(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2508704

N. Chandra, N. Litchinitser

{"title":"Understanding the dynamics of light-meta structure interactions using skin-depth engineering (Conference Presentation)","authors":"N. Chandra, N. Litchinitser","doi":"10.1117/12.2508704","DOIUrl":"https://doi.org/10.1117/12.2508704","url":null,"abstract":"Traditionally, geometrical factors have not played an important role in determining the distribution of current across conducting boundaries. Typically, the classical skin depth expression is used to estimate currents within the volume. We have developed a novel geometry-based framework which describes current distributions within the volume of structures which allows us to engineer skin depth using boundary shapes. A more accurate knowledge of current densities is an important degree of freedom to design and analyze meta-structures and their interactions. Our approach is grounded in a rigorous analysis of electromagnetic wave scattering from shell structures for which the importance of geometrical parameters in the expressions for skin depth to accurately describe interactions has been confirmed. Starting from Maxwell’s equations, we have analyzed the temporal dynamics of electromagnetic interactions with meta-structures and their relationship to vector potentials. Individual wavelength or subwavelength sized meta-structures can be designed to localize the incident electromagnetic radiation and create a change in the local constitutive relations. Having an accurate determination of the current distribution within the volume of scattering structures plays an important role in designing and determining the effective constitutive parameters of 2D and 3D metamaterials. Combinations of materials with custom geometries suggest that this kind of skin depth engineering can lead to new families of linear and non-linear meta-atoms impacting imaging, harmonic generation, and the design of antennas and their shielding.","PeriodicalId":307226,"journal":{"name":"High Contrast Metastructures VIII","volume":"69 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132433918","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

Active dielectric nanoantennas and metasurfaces (Conference Presentation) 有源介质纳米天线和超表面(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2509288

A. Kuznetsov

引用次数: 0

Dynamic control at visible wavelengths of all-dielectric metasurfaces embedded in liquid crystals (Conference Presentation) 液晶中全介电超表面可见波长的动态控制(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2507714

R. Paniagua‐Domínguez, Shiqiang Li, Xuewu Xu, Mingyu Sun, R. M. Veetil, Xinan Liang, A. Kuznetsov

引用次数: 0

Metasurface aberration correctors for broadband achromatic refractive optics (Conference Presentation) 宽带消色差折射光学的超表面像差校正器(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2508512

W. T. Chen, F. Capasso

引用次数: 0

Control of transverse modes and thermal stability of vertical-cavity surface-emitting lasers incorporating monolithic high-contrast grating mirrors (Conference Presentation) 采用单片高对比度光栅反射镜的垂直腔面发射激光器的横向模式控制和热稳定性(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2508671

M. Gȩbski, M. Wasiak, M. Marciniak, M. Dems, J. Lott, T. Czyszanowski

{"title":"Control of transverse modes and thermal stability of vertical-cavity surface-emitting lasers incorporating monolithic high-contrast grating mirrors (Conference Presentation)","authors":"M. Gȩbski, M. Wasiak, M. Marciniak, M. Dems, J. Lott, T. Czyszanowski","doi":"10.1117/12.2508671","DOIUrl":"https://doi.org/10.1117/12.2508671","url":null,"abstract":"Since the very first demonstration of a vertical-cavity surface-emitting laser (VCSEL) incorporating subwavelength high refractive index contrast grating (HCG) membrane mirror in 2007 by the group of Prof. Chang-Hasnain, numerous research groups around the world have presented devices based on the same concept emitting at wavelengths from ~400 to 1550 nm manufactured in gallium nitride (GaN), gallium arsenide (GaAs) and indium phosphide (InP) material systems. On one hand, an open access to a VCSEL cavity through an air gap combined with a very low inertia of an HCG mirror opened a way for a large range of emission wavelengths in MEMS tunable VCSELs. On the other hand, an air gap in a cavity generally hinders heat and current flow, while the potentially rather fragile HCG membrane is prone to mechanical instability. We present electrically-injected VCSELs incorporating monolithic HCG (MHCG) mirrors. An MHCG mirror being a special case of an HCG mirror, keeps the extraordinary features of an HCG such as scalability with wavelength, ultra-low thickness and very large power reflectance, but doesn't have to be surrounded by a low refractive index material and hence can be monolithically integrated with an all-semiconductor VCSEL cavity. We present an extensive analysis of the impact of the MHCG parameters on the modal properties and thermal stability of single- and double-mode devices, with various oxide apertures. We additionally compare MHCG VCSELs and generic distributed Bragg reflector VCSELs in terms of modal properties and temperature stability based on measured data and the results of computer simulations.","PeriodicalId":307226,"journal":{"name":"High Contrast Metastructures VIII","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128512625","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

Ultraviolet metasurface based on highly scattering silicon antennas (Conference Presentation) 基于高散射硅天线的紫外超表面(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2508169

Yang Deng, Xi Wang, Zilun Gong, Kaichen Dong, Shuai Lou, Nicolas C. Pégard, Kyle B. Tom, Fuyi Yang, L. Waller, Zheng You, Jie Yao

{"title":"Ultraviolet metasurface based on highly scattering silicon antennas (Conference Presentation)","authors":"Yang Deng, Xi Wang, Zilun Gong, Kaichen Dong, Shuai Lou, Nicolas C. Pégard, Kyle B. Tom, Fuyi Yang, L. Waller, Zheng You, Jie Yao","doi":"10.1117/12.2508169","DOIUrl":"https://doi.org/10.1117/12.2508169","url":null,"abstract":"With signatures of high photon energy and short wavelength, ultraviolet (UV) light enables numerous applications such as high-resolution imaging, photolithography and sensing. In order to manipulate UV light, bulky optics are usually required and thereby do not meet the fast-growing requirements of integration in compact systems. Recently, metasurfaces, with subwavelength or wavelength thicknesses, have shown unprecedented control of light, enabling substantial miniaturization of photonic devices from Terahertz to visible regions. However, material limitations and fabrication challenges have hampered the realization of such functionalities at shorter wavelengths. Herein, we theoretically and experimentally demonstrate that metasurfaces, made of highly scattering silicon (Si) antennas, can be designed and fabricated to manipulate broadband UV light. The metasurface thickness is only one-tenth of the working wavelength, resulting in very small height-to-width aspect ratio (~ 1). Peak conversion efficiency reaches 15% and diffraction efficiency is up to 30%, which are comparable to plasmonic metasurface performances in infrared (IR). A double bar structure is proposed to further improve the metasurface’s diffraction efficiency to close to 100% in transmission mode over a broad UV band. Moreover, for the first time, we show photolithography enabled by metasurface-generated UV holograms. We attribute such performance enhancement to the high scattering cross-sections of Si antennas in the UV range, which is adequately modeled via a circuit. Our new platform will deepen our understanding of light-matter interactions and introduce even more material options to broadband metaphotonic applications, including those in integrated photonics and holographic lithography technologies.","PeriodicalId":307226,"journal":{"name":"High Contrast Metastructures VIII","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131854671","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

Sub-wavelength visualisation of optical modes in all-dielectric nanostructures (Conference Presentation) 全介电纳米结构中光学模式的亚波长可视化(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2509959

N. Verellen, A. Frolov, Xuezhi Zheng, G. Vandenbosch, P. Dorpe, A. Fedyanin, V. Moshchalkov

引用次数: 0

Gallium nitride metasurfaces and conformable meta-optics (Conference Presentation) 氮化镓超表面与适形元光学(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2506171

G. Brière, S. Héron, P. Ni, B. Damilano, S. Vézian, Kedi Wu, Qi Jie Wang, P. Genevet

引用次数: 0

All-dielectric Mie-resonant nanophotonics and meta-optics (Conference Presentation) 全介电mie谐振纳米光子学和元光学(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2515150

Y. Kivshar

{"title":"All-dielectric Mie-resonant nanophotonics and meta-optics (Conference Presentation)","authors":"Y. Kivshar","doi":"10.1117/12.2515150","DOIUrl":"https://doi.org/10.1117/12.2515150","url":null,"abstract":"Metamaterials---artificial electromagnetic media that are structured on the subwavelength scale---were initially suggested for the realisation of negative-index media, and later they became a paradigm for engineering electromagnetic space and control¬ling propagation of waves. However, applications of metamaterials in optics are limited due to inherent losses in metals employed for the realisation of artificial optical magnetism. Recently, we observe the emergence of a new field of all-dielectric resonant meta-optics aiming at the manipulation of strong optically-induced electric and magnetic Mie-type resonances in dielectric and semiconductor nanostructures with relatively high refractive index. Unique advantages of dielectric resonant nanostructures over their metallic counterparts are low dissipative losses and the enhancement of both electric and magnetic fields that provide competitive alternatives for plasmonic structures including optical nanoantennas, efficient biosensors, passive and active metasurfaces, and functional metadevices. This talk will summarize the most recent advances in all-dielectric Mie-resonant meta-optics including active nanophotonics as well as the recently emerged fields of topological photonics and nonlinear metasurfaces.","PeriodicalId":307226,"journal":{"name":"High Contrast Metastructures VIII","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125895897","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