High Contrast Metastructures VIII最新文献_第3页

Metagratings to mold the light wavefront with large efficiency (Conference Presentation) 高效率模化光波前的超聚合器(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2510709

A. Alú

引用次数: 0

Interfacing single-photon emitters in atomically thin van der Waals crystals with photonic metasurfaces (Conference Presentation) 在具有光子超表面的原子薄范德华晶体中连接单光子发射器(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2510989

P. Jha, G. K. Shirmanesh, A. Mitskovets, Arun Nagpal, Hamidreza Akbari, B. Vest, Cora M. Went, R. Sokhoyan, H. Atwater

{"title":"Interfacing single-photon emitters in atomically thin van der Waals crystals with photonic metasurfaces (Conference Presentation)","authors":"P. Jha, G. K. Shirmanesh, A. Mitskovets, Arun Nagpal, Hamidreza Akbari, B. Vest, Cora M. Went, R. Sokhoyan, H. Atwater","doi":"10.1117/12.2510989","DOIUrl":"https://doi.org/10.1117/12.2510989","url":null,"abstract":"One of the central challenges for practical applications of single-photon sources is the ability to efficiently extract light from a single quantum emitter. A useful single-photon source must emit into a well-defined direction because in practice one can collect light only in a finite solid angle. Here, we propose to harness the exceptional light molding capabilities of photonic metasurfaces to engineer the emission from quantum emitters and achieve highly directional emission. \u0000\u0000We have designed a phase gradient reflectarray metasurface, which efficiently collects spontaneous emission from a quantum emitter, located in the far-field (d~5 wavelengths), and redirects it back to the source. By controlling the phase imprinted by the metasurface on the incident light, we control the emission properties of the emitters. We apply this concept to design a metasurface for use with hexagonal boron nitride (hBN) single photon emitters operating at 620 nm. We have observed experimentally bright single photon emission at 620 nm with a remarkably narrow spectral width of zero-phonon line emission from multilayer hBN films synthesized by chemical vapor deposition. Simulations show that at a wavelength of 620 nm, the reflection efficiency of our metasurface is greater than 85%, and that the emission from these emitters are highly directional with deviation from emission in the surface-normal direction of 2∆θ ~ 20°. We will report on experimental measurements of hBN quantum emitters coupled to metasurfaces and describe metasurface designs for coupling of multiple quantum emitters.","PeriodicalId":307226,"journal":{"name":"High Contrast Metastructures VIII","volume":"114 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":"117071502","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

Metasurfaces in the near ultraviolet regime and their applications (Conference Presentation) 近紫外波段的超表面及其应用(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2508122

Hong Liu

引用次数: 0

Tunable Huygens metasurfaces for large amplitude and phase modulations (Conference Presentation) 用于大振幅和相位调制的可调谐惠更斯超表面(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2508787

C. Zou, A. Komar, Justus Bohn, S. Fasold, A. Muravsky, A. Murauski, T. Pertsch, D. Neshev, I. Staude

引用次数: 0

Parallel polarization state generation and measurement with a single metasurface (Conference Presentation) 单超表面平行偏振态的产生与测量(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2511205

N. Rubin, Aun Zaidi, M. Juhl, Ruoping Li, Balthasar Mueller, R. Devlin, K. Leosson, F. Capasso

{"title":"Parallel polarization state generation and measurement with a single metasurface (Conference Presentation)","authors":"N. Rubin, Aun Zaidi, M. Juhl, Ruoping Li, Balthasar Mueller, R. Devlin, K. Leosson, F. Capasso","doi":"10.1117/12.2511205","DOIUrl":"https://doi.org/10.1117/12.2511205","url":null,"abstract":"In polarimetry, that is, a measurement of the four-component polarization Stokes vector, a measurement must either consist of four (or more) sequential intensity measurements, sacrificing time resolution, or contain four separate light paths each with separate polarization optics, increasing bulk, cost, and system complexity. Similar issues present difficulty across polarization optics technology.\u0000\u0000Metasurfaces, nanophotonic arrays of phase shifting elements, have emerged as a novel platform for polarization optics. These individual phase shifters can be designed with a characteristic anisotropy, and are thus imbued with tunable shape birefringence. A metasurface, then, can function as a subwavelength spaced array of nanoscale waveplates.\u0000\u0000I will describe how, through relatively simple optimization methods, a metasurface producing arbitrarily specified polarization states (when illuminated with light of a known polarization) can be designed. This functionality is equivalent to a traditional diffraction grating with individual waveplate optics on each order; here, all the necessary polarization optics can be integrated into a flat, ultrathin optical element. Moreover, such a metasurface can be used in a reverse configuration as a parallel snapshot polarimeter with no need for additional polarization optics (save for a single polarizer). I present a detailed experimental characterization of both concepts in the visible spectral region and a comparison of the performance of the metasurface to a commercially available rotating waveplate polarimeter. With no bulk birefringent crystal optics, a parallel, full-polarization state measurement can be made with an integrated, scalable, and inexpensive device. Given its diffractive nature, the design naturally extends to spectropolarimetry and polarization imaging.","PeriodicalId":307226,"journal":{"name":"High Contrast Metastructures VIII","volume":"51 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":"116073932","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

Two-way asymmetric flat optics with nonlinear metasurfaces (Conference Presentation) 非线性超表面的双向非对称平面光学(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2511079

Nir Shitrit, Jeongmin Kim, David S. Barth, H. Ramézani, Yuan Wang, Xiang Zhang

引用次数: 0

Dielectric metasurfaces for spectroscopy and computational imaging (Conference Presentation) 光谱学和计算成像的介电超表面(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2515106

A. Faraon

引用次数: 0

Rainbow-free guided-mode resonance metasurfaces for optical eye-tracking with near-unity transmission (Conference Presentation) 近统一传输光学眼动追踪的无彩虹导模共振超表面(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2507273

Jung-Hwan Song, S. Kim, J. Groep, M. Brongersma

{"title":"Rainbow-free guided-mode resonance metasurfaces for optical eye-tracking with near-unity transmission (Conference Presentation)","authors":"Jung-Hwan Song, S. Kim, J. Groep, M. Brongersma","doi":"10.1117/12.2507273","DOIUrl":"https://doi.org/10.1117/12.2507273","url":null,"abstract":"Eye tracking has been an indispensable analysis method in a wide range of research fields, including Psychology, Neurology, and ophthalmology. Recent developments in augmented reality are pushing for more compact, transparent eye trackers compatible with head-mounted display or heads-up display. Oblique half-mirror and holographic waveguide satisfy these criteria and now widely used in eye-controlled displays, auto-driving, and near-to-eye displays. However, these still require bulky supplementary optics, are poorly transparent, and produce rainbow images due to non-zero diffraction in the visible spectrum.\u0000Here, we demonstrate ultra-thin, rainbow-free eye tracking diffractive optical elements based on guided mode resonance that exhibits near-unity transmission. It consists of a 200-nm-thick Si3N4 slab waveguide sandwiched between a quartz substrate and a 100-nm-thick SiO2 capping layer designed for high transmission (>90%) over the whole visible spectrum. The insertion of 3-nm-thick Si grating layer at the interface between the slab waveguide and capping layer launches high-quality (Q~2,000), leaky guided modes in the slab waveguide at specific wavelengths for a fixed incident angle and polarization, which enables us to efficiently (13%) characterize resonant light diffraction at 870 nm. In the visible, on the other hand, the guided mode resonance becomes weak due to Si absorption, resulting in strongly suppressed rainbow-producing diffractions below 0.1% efficiency. By locating a single webcam at near-grazing angle, corresponding to the output diffracted order at 870 nm, the full anterior images of an artificial eyes are obtained. Our device opens a promising route toward ultra-compact, transparent, and non-obtrusive imaging for displays and optical switching applications.","PeriodicalId":307226,"journal":{"name":"High Contrast Metastructures VIII","volume":"20 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":"117319683","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

Multifunctional active reflectarray metasurfaces (Conference Presentation) 多功能主动反射元表面(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2510673

Ghazaleh Kafaie Shirmanesh, R. Sokhoyan, P. Wu, H. Atwater

引用次数: 0

Multi-layer multifunctional metasurface design using the adjoint sensitivity technique (Conference Presentation) 基于伴随灵敏度技术的多层多功能超表面设计(会议报告)

High Contrast Metastructures VIII Pub Date : 2019-03-08 DOI: 10.1117/12.2510379

M. Mansouree, A. Arbabi

引用次数: 2