Relevant bibliographies by topics / Ultrathin Metasurfaces

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Academic literature on the topic 'Ultrathin Metasurfaces'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Ultrathin Metasurfaces"

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Ren, Xuexin, Pankaj K. Jha, Yuan Wang, and Xiang Zhang. "Nonconventional metasurfaces: from non-Hermitian coupling, quantum interactions, to skin cloak." Nanophotonics 7, no. 6 (2018): 1233–43. http://dx.doi.org/10.1515/nanoph-2018-0006.

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AbstractMetasurfaces are optically thin layers of subwavelength resonators that locally tailor the electromagnetic response at the nanoscale. Our metasurface research aims at developing novel designs and applications of metasurfaces that go beyond the classical regimes. In contrast to conventional phase gradient metasurfaces where each meta-atom responds individually, we are interested in developing metasurfaces where neighboring meta-atoms are strongly coupled. By engineering a non-Hermitian coupling between the meta-atoms, new degrees of freedom are introduced and novel functionalities can be achieved. We are also interested in combining classical metasurface with quantum emitters, which may offer opportunities for on-chip quantum technologies. Additionally, we have been designing metasurfaces to realize exciting phenomena and applications, such as ultrathin metasurface cloak and strong photonic spin-Hall effect. In this paper, we review our research efforts in optical metasurfaces in the past few years, which ranges from conventional to novel type of metasurface and from classical to quantum regime.
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Intaravanne, Yuttana, and Xianzhong Chen. "Recent advances in optical metasurfaces for polarization detection and engineered polarization profiles." Nanophotonics 9, no. 5 (2020): 1003–14. http://dx.doi.org/10.1515/nanoph-2019-0479.

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AbstractLike amplitude, phase and frequency, polarization is one of the fundamental properties of light, which can be used to record, process and store information. Optical metasurfaces are ultrathin inhomogeneous media with planar nanostructures that can manipulate the optical properties of light at the subwavelength scale, which have become a current subject of intense research due to the desirable control of light propagation. The unprecedented capability of optical metasurfaces in the manipulation of the light’s polarization at subwavelength resolution has provided an unusual approach for polarization detection and arbitrary manipulation of polarization profiles. A compact metasurface platform has been demonstrated to detect polarization information of a light beam and to arbitrarily engineer a polarization profile that is very difficult or impossible to realize with conventional optical elements. This review will focus on the recent progress on ultrathin metasurface devices for polarization detection and realization of customized polarization profiles. Optical metasurfaces have provided new opportunities for polarization detection and manipulation, which can facilitate real-world deployment of polarization-related devices and systems in various research fields, including sensing, imaging, encryption, optical communications, quantum science, and fundamental physics.
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Guo, Kai, and Zhongyi Guo. "Ultrathin Microwave Devices for Polarization-Dependent Wavefront Shaping Based on an Anisotropic Metasurface." Applied Sciences 8, no. 12 (2018): 2471. http://dx.doi.org/10.3390/app8122471.

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Metasurfaces have recently become a promising material, offering new degrees of freedom in molding electromagnetic wave properties. In this work, we propose and numerically investigate ultrathin microwave devices for polarization-dependent wavefront shaping based on an anisotropic metasurface, which consists of a square metal ring with a cross, a dielectric substrate, and a metal ground plane. It is demonstrated the proposed metasurface can independently manipulate reflective x- and y-polarized wavefronts at frequency of 15 GHz via engineering of the metal cross. Furthermore, the reflective efficient is extremely high, reaching a near-unity value of 0.98. Based on this anisotropic metasurface, a polarization beam splitter is achieved by artificially arranging the spatial distribution of metasurfaces with prescribed geometries. In addition, we successfully design a focusing metasurface to separate the x- and y-polarized beams via focusing them at different positions. The proposed approach paves a way toward the applications of the metasurface in a microwave band.
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Zhang, Shuyan, Chi Lok Wong, Shuwen Zeng, et al. "Metasurfaces for biomedical applications: imaging and sensing from a nanophotonics perspective." Nanophotonics 10, no. 1 (2020): 259–93. http://dx.doi.org/10.1515/nanoph-2020-0373.

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AbstractMetasurface is a recently developed nanophotonics concept to manipulate the properties of light by replacing conventional bulky optical components with ultrathin (more than 104 times thinner) flat optical components. Since the first demonstration of metasurfaces in 2011, they have attracted tremendous interest in the consumer optics and electronics industries. Recently, metasurface-empowered novel bioimaging and biosensing tools have emerged and been reported. Given the recent advances in metasurfaces in biomedical engineering, this review article covers the state of the art for this technology and provides a comprehensive interdisciplinary perspective on this field. The topics that we have covered include metasurfaces for chiral imaging, endoscopic optical coherence tomography, fluorescent imaging, super-resolution imaging, magnetic resonance imaging, quantitative phase imaging, sensing of antibodies, proteins, DNAs, cells, and cancer biomarkers. Future directions are discussed in twofold: application-specific biomedical metasurfaces and bioinspired metasurface devices. Perspectives on challenges and opportunities of metasurfaces, biophotonics, and translational biomedical devices are also provided. The objective of this review article is to inform and stimulate interdisciplinary research: firstly, by introducing the metasurface concept to the biomedical community; and secondly by assisting the metasurface community to understand the needs and realize the opportunities in the medical fields. In addition, this article provides two knowledge boxes describing the design process of a metasurface lens and the performance matrix of a biosensor, which serve as a “crash-course” introduction to those new to both fields.
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Sarma, Raktim, Michael Goldflam, Emily Donahue, et al. "Optimization and Prediction of Spectral Response of Metasurfaces Using Artificial Intelligence." Crystals 10, no. 12 (2020): 1114. http://dx.doi.org/10.3390/cryst10121114.

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Hot-electron generation has been a topic of intense research for decades for numerous applications ranging from photodetection and photochemistry to biosensing. Recently, the technique of hot-electron generation using non-radiative decay of surface plasmons excited by metallic nanoantennas, or meta-atoms, in a metasurface has attracted attention. These metasurfaces can be designed with thicknesses on the order of the hot-electron diffusion length. The plasmonic resonances of these ultrathin metasurfaces can be tailored by changing the shape and size of the meta-atoms. One of the fundamental mechanisms leading to generation of hot-electrons in such systems is optical absorption, therefore, optimization of absorption is a key step in enhancing the performance of any metasurface based hot-electron device. Here we utilized an artificial intelligence-based approach, the genetic algorithm, to optimize absorption spectra of plasmonic metasurfaces. Using genetic algorithm optimization strategies, we designed a polarization insensitive plasmonic metasurface with 90% absorption at 1550 nm that does not require an optically thick ground plane. We fabricated and optically characterized the metasurface and our experimental results agree with simulations. Finally, we present a convolutional neural network that can predict the absorption spectra of metasurfaces never seen by the network, thereby eliminating the need for computationally expensive simulations. Our results suggest a new direction for optimizing hot-electron based photodetectors and sensors.
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Liu, Bo, Kerui Song, and Jiangnan Xiao. "Two-Dimensional Optical Metasurfaces: From Plasmons to Dielectrics." Advances in Condensed Matter Physics 2019 (January 10, 2019): 1–15. http://dx.doi.org/10.1155/2019/2329168.

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Metasurfaces, kinds of planar ultrathin metamaterials, are able to modify the polarization, phase, and amplitude of physical fields of optical light by designed periodic subwavelength structures, attracting great interest in recent years. Based on the different type of the material, optical metasurfaces can be separated in two categories by the materials: one is metal and the other is dielectric. Metal metasurfaces rely on the surface plasma oscillations of subwavelength metal particles. Nevertheless, the loss caused by the metal structures has been a trouble, especially for devices working in transmit modes. The dielectric metasurfaces are based on the Faraday-Tyndall scattering of high-index dielectric light scattering particles. By reasonably designing the relevant parameters of the unit structure such as the size, direction, and shape, different functions of metasurfaces can realize and bring a wide range of applications. This article focuses on the metasurface concepts such as anomalous reflections and refractions and the working principle of different types of metasurfaces. Here, we briefly review the progress in developing optical over past few years and look into the near future.
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Wang, Hsiang-Chu, Cheng Hung Chu, Pin Chieh Wu, et al. "Ultrathin Planar Cavity Metasurfaces." Small 14, no. 17 (2018): 1703920. http://dx.doi.org/10.1002/smll.201703920.

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Wang, Kai, James G. Titchener, Sergey S. Kruk, et al. "Quantum metasurface for multiphoton interference and state reconstruction." Science 361, no. 6407 (2018): 1104–8. http://dx.doi.org/10.1126/science.aat8196.

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Metasurfaces based on resonant nanophotonic structures have enabled innovative types of flat-optics devices that often outperform the capabilities of bulk components, yet these advances remain largely unexplored for quantum applications. We show that nonclassical multiphoton interferences can be achieved at the subwavelength scale in all-dielectric metasurfaces. We simultaneously image multiple projections of quantum states with a single metasurface, enabling a robust reconstruction of amplitude, phase, coherence, and entanglement of multiphoton polarization-encoded states. One- and two-photon states are reconstructed through nonlocal photon correlation measurements with polarization-insensitive click detectors positioned after the metasurface, and the scalability to higher photon numbers is established theoretically. Our work illustrates the feasibility of ultrathin quantum metadevices for the manipulation and measurement of multiphoton quantum states, with applications in free-space quantum imaging and communications.
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Liu, Yahong, Meize Li, Kun Song, et al. "Broadband gradient phase discontinuity all-dielectric metasurface." Modern Physics Letters B 34, no. 15 (2020): 2050168. http://dx.doi.org/10.1142/s0217984920501687.

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In recent years, metasurfaces have widely been studied due to their ability to offer a spatially varying phase response, low losses, ultrathin size, and easy fabrication. In this paper, a gradient phase discontinuity all-dielectric metasurface consisting of arrays of silicon cube resonator is designed. By adjusting the dimension of the silicon cube resonator, a [Formula: see text] transmission phase covered from [Formula: see text] to [Formula: see text] with [Formula: see text] phase intervals is realized in a frequency from 9.7 GHz to 11.8 GHz. We demonstrate the all-dielectric metasurface can produce the anomalous refraction, vortex beams, and wave-focusing in the microwave and infrared band, respectively. It can be expected that the proposed metasurfaces can find wide applications in communication, designing integrated optical devices, and focusing lenses.
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He, Qiong, Shulin Sun, and Lei Zhou. "Tunable/Reconfigurable Metasurfaces: Physics and Applications." Research 2019 (July 7, 2019): 1–16. http://dx.doi.org/10.34133/2019/1849272.

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Metasurfaces, ultrathin metamaterials constructed by planar meta-atoms with tailored electromagnetic (EM) responses, have attracted tremendous attention due to their exotic abilities to freely control EM waves. With active elements incorporated into metasurface designs, one can realize tunable and/or reconfigurable metadevices with functionalities controlled by external stimuli, opening a new platform to dynamically manipulate EM waves. In this article, we briefly review recent progress on tunable/reconfigurable metasurfaces, focusing on their working mechanisms and practical applications. We first describe available approaches, categorized into different classes based on external stimuli applied, to realize homogeneous tunable/reconfigurable metasurfaces, which can offer uniform manipulations on EM waves. We next summarize recent achievements on inhomogeneous tunable/reconfigurable metasurfaces with constitutional meta-atoms locally tuned by external knobs, which can dynamically control the wave-fronts of EM waves. We conclude this review by presenting our own perspectives on possible future directions and existing challenges in this fast developing field.
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Dissertations / Theses on the topic "Ultrathin Metasurfaces"

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Wen, Dandan. "Metasurfaces for ultrathin optical devices with unusual functionalities." Thesis, Heriot-Watt University, 2017. http://hdl.handle.net/10399/3377.

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Metamaterials are artificial materials that are made from periodically arranged structures, showing properties that cannot be found in nature. The response of a metamaterial to the external field is defined by the geometry, orientation, and distribution of the artificial structures. Many groundbreaking discoveries, such as negative refraction, and super image resolution has been demonstrated based on metamaterials. Nevertheless, the difficulty in three-dimensional fabrication, especially when the operating band is located in the optical range, hinders their practical applications. As a two-dimensional counterpart, a metasurface consists of an array of planar optical antennas, which locally modify the properties of the scattered light. Metasurfaces do not require complicated three-dimensional nanofabrication techniques, and the complexity of the fabrication is greatly reduced. Also, the thickness of a metasurface can be deep subwavelength, making it possible to realize ultrathin devices. In this thesis, geometric metasurfaces are utilized to realize a series of optical devices with unusual functionalities. Phase gradient metasurface is used to split the incident light into left-handed polarized (LCP) and right-handed polarized (RCP) components, whose intensities can be used to determine the polarization state of the incident light. Then we propose a method to integrate two optical elements with different functionalities into a single metasurface device, and its overall performance is determined by the polarization of the incident light. After that, a helicity multiplexed metasurface hologram is demonstrated to reconstruct two images with high efficiency and broadband. The two images swap their positions with the helicity reversion of the incident light. Finally, a polarization rotator is presented, which can rotate the incident light to arbitrary polarization direction by using the non-chiral metasurface. The proposed metasurface devices may inspire the development of new optical devices, and expand the applications of metasurfaces in integrated optical systems.
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Alyammahi, Saleimah. "Design and Simulation of Multifunctional Optical Devices Using Metasurfaces." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1508340337384298.

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Wang, Chun-Yu, and 王君瑜. "Applications of Metasurface and coherent perfect absorption in optoelectronic devices: meta-waveplate and ultrathin solar cell." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/gnugfr.

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碩士<br>國立東華大學<br>光電工程學系<br>103<br>This study can be divided into two parts; the first part is focused on the application of metasurfaces, taking meta-waveplate for example. And the second part is focused on the application of coherent perfect absorption (CPA), taking ultrathin solar cell for example. In the first part, we hope to demonstrate a cross-shaped reflective meta-waveplate which has the ability of phase modulation. The main structure is consist of metal back reflector/dielectric/Au nano cross-shaped, with is a MIM structure. We can reach a quarter-waveplate condition by changing the long axis and short axis. In magnetic field analyze, we can see the upper metal structure will have strong couple with the lower metal layer in the working wavelength, produce a magnetic dipole in the middle of the dielectric. Thus, the meta-waveplate is not sensitive to the incident. By Jones matrix to analyze the experiment result, we find out the best phase difference of our meta-waveplate so far is 82o. In the future, we will improve the structure and fabrication steps, and further combine these magnetic dipoles to make the materials we need. In the second part, we use a substrate/back reflector/ZnO/a-Si structure to reach CPA to make an ultrathin solar cell. We use Au as a back reflector, which make the two coherent light (incident and reflect light) form a standing wave in the space. ZnO played a key role on tuning the position of standing wave and all the absorption are rely on a-Si. By using the multi-layer reflection equation to calculate, the absorption of a-Si is increasing from 50% to 95% by the CPA. From the reflection spectrum we can also find out that with a suitable thickness of ZnO, the absorption around 600 nm will be around 90%. But on electro-characterization, the best Jsc and Voc so far is around 2.2610-6 A and 1.3 V, respectively. The area of the sample is around 1.125 cm2, and the  is around 0.17%. In the future, we will optimize the cell structure, for example: better crystallization by thermal annealing; appropriate band diagram engineering by changing doping concentration; better electric properties by tuning the contact electrode, higher external quantum efficiency by optimizing the film thickness, and so on.
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Book chapters on the topic "Ultrathin Metasurfaces"

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Chen, Xianzhong, Lei Zhang, Cheng-Wei Qiu, and Shuang Zhang. "Ultrathin Metalens and Three-Dimensional Optical Holography Using Metasurfaces." In Plasmonics and Super-Resolution Imaging. CRC Press, 2017. http://dx.doi.org/10.4324/9781315206530-4.

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Hou, Haisheng, Haipeng Li, Guangming Wang, Tong Cai, Xiangjun Gao, and Wenlong Guo. "High Performance Metasurface Antennas." In Modern Printed-Circuit Antennas. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.88395.

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Recently, metasurfaces (MSs) have received tremendous attention because their electromagnetic properties can be controlled at will. Generally, metasurface with hyperbolic phase distributions, namely, focusing metasurface, can be used to design high-gain antennas. Besides, metasurface has the ability of controlling the polarization state of electromagnetic wave. In this chapter, we first propose a new ultrathin broadband reflected MS and take it into application for high-gain planar antenna. Then, we propose multilayer multifunctional transmitted MSs to simultaneously enhance the gain and transform the linear polarization to circular polarization of the patch antenna. This kind of high-gain antenna eliminates the feed-block effect of the reflected ones.
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Chen, Xianzhong, Lei Zhang, Cheng-Wei Qiu, and Shuang Zhang. "Ultrathin Metalens and Three-Dimensional Optical Holography Using Metasurfaces." In Plasmonics and Super-Resolution Imaging. Jenny Stanford Publishing, 2017. http://dx.doi.org/10.1201/9781315206530-3.

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Chen, Xianzhong, Dandan Wen, and Fuyong Yue. "Metasurface and ultrathin optical devices." In Optical MEMS, Nanophotonics, and Their Applications. CRC Press, 2017. http://dx.doi.org/10.1201/9781315151557-11.

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Conference papers on the topic "Ultrathin Metasurfaces"

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Tymchenko, Mykhailo, Nishant Nookala, J. Sebastian Gomez-Diaz, Mikhail A. Belkin, Andrea Alu, and Jongwon Lee. "Ultrathin nonlinear metasurfaces." In 2016 IEEE International Conference on Mathematical Methods in Electromagnetic Theory (MMET). IEEE, 2016. http://dx.doi.org/10.1109/mmet.2016.7544090.

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Ren Wang and Bing-Zhong Wang. "Creating arbitrary illusions by planar ultrathin metasurfaces." In 2016 Progress in Electromagnetic Research Symposium (PIERS). IEEE, 2016. http://dx.doi.org/10.1109/piers.2016.7734960.

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Nookala, N., J. Lee, M. Tymchenko, et al. "Flat nonlinear optics with ultrathin highly-nonlinear metasurfaces." In 2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS). IEEE, 2016. http://dx.doi.org/10.1109/metamaterials.2016.7746433.

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Xianzhong Chen, Dandan Wen, and Fuyong Yue. "Unusual ultrathin optical devices: Metasurfaces make them practical." In 2016 Progress in Electromagnetic Research Symposium (PIERS). IEEE, 2016. http://dx.doi.org/10.1109/piers.2016.7734955.

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Qiu, Cheng-Wei. "Ultrathin Structured 2D Surfaces: Hybridizing 2D Materials & Metasurfaces." In Conference on Lasers and Electro-Optics/Pacific Rim. OSA, 2018. http://dx.doi.org/10.1364/cleopr.2018.th3g.1.

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Lee, J., N. Nookala, M. Tymchenko, et al. "Flat nonlinear optics: Efficient frequency conversion in ultrathin nonlinear metasurfaces." In 2015 IEEE Photonics Conference (IPC). IEEE, 2015. http://dx.doi.org/10.1109/ipcon.2015.7323712.

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Rodriguez-Esquerre, Vitaly F., Tulio Freitas Simões de Castro, and Rafael Andrade Vieira. "Anomalous refraction of infrared waves through ultrathin all dielectric metasurfaces." In Metamaterials, Metadevices, and Metasystems 2017, edited by Nader Engheta, Mikhail A. Noginov, and Nikolay I. Zheludev. SPIE, 2017. http://dx.doi.org/10.1117/12.2292471.

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Tymchenko, Mykhailo, J. Sebastian Gomez-Diaz, J. Lee, Mikhail A. Belkin, and Andrea Alu. "Ultrathin nonlinear metasurfaces with continuous phase control at the nanoscale." In 2016 10th European Conference on Antennas and Propagation (EuCAP). IEEE, 2016. http://dx.doi.org/10.1109/eucap.2016.7481663.

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Nookala, Nishant, Jongwon Lee, Juan Sebastián Gómez-Díaz, et al. "Ultrathin gradient nonlinear metasurfaces with giant nonlinear response (Conference Presentation)." In Metamaterials, Metadevices, and Metasystems 2016, edited by Nader Engheta, Mikhail A. Noginov, and Nikolay I. Zheludev. SPIE, 2016. http://dx.doi.org/10.1117/12.2240556.

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Cai, Haozanz, David Czanlewski, Karim Ozando, et al. "Digitally Designed Ultrathin Metasurfaces for Multiwavelength Optics in the Visible." In 2018 International Conference on Optical MEMS and Nanophotonics (OMN). IEEE, 2018. http://dx.doi.org/10.1109/omn.2018.8454559.

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Reports on the topic "Ultrathin Metasurfaces"

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Azad, Abul Kalam, Shobhita Kramadhati, Sinhara Rishi Malinda Silva, Nicholas Steven Sirica, and Houtong Chen. Flat Ultrathin Metasurface Parabolic Reflector for THz Applications. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1493535.

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