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| 1 | Generation of wavelength-independent subwavelength Bessel beams using metasurfaces显示文摘Bessel beams are of great interest due to their unique non-diffractive properties.Using a conical prism or an objective paired with an annular aperture are two typical approaches for generating zeroth-order Bessel beams.However,the former approach has a limited numerical aperture(NA),and the latter suffers from low efficiency,as most of the incident light is blocked by the aperture.Furthermore,an additional phase-modulating element is needed to generate higher-order Bessel beams,which in turn adds complexity and bulkiness to the system.We overcome these problems using dielectric metasurfaces to realize meta-axicons with additional functionalities not achievable with conventional means.We demonstrate meta-axicons with high NA up to 0.9 capable of generating Bessel beams with full width at half maximum about as small as~λ/3(λ=405 nm).Importantly,these Bessel beams have transverse intensity profiles independent of wavelength across the visible spectrum.These meta-axicons can enable advanced research and applications related to Bessel beams,such as laser fabrication,imaging and optical manipulation. | Wei Ting Chen Mohammadreza Khorasaninejad Alexander Y.Zhu Jaewon Oh Robert C.Devlin Aun Zaidi Federico Capasso | 2016 | Light(Science & Applications)2016，5，1： | 2 |
| 2 | Measurement of bound states in the continuum by a detector embedded in a photonic crystal显示文摘We directly measure optical bound states in the continuum(BICs)by embedding a photodetector into a photonic crystal slab.The BICs observed in our experiment are the result of accidental phase matching between incident,reflected and in-plane waves at seemingly random wave vectors in the photonic band structure.Our measurements were confirmed through a rigorously coupled-wave analysis simulation in conjunction with temporal coupled mode theory.Polarization mixing between photonic crystal slab modes was observed and described using a plane wave expansion simulation.The ability to probe the field intensity inside the photonic crystal and thereby to directly measure BICs represents a milestone in the development of integrated opto-electronic devices based on BICs. | Roman Gansch Stefan Kalchmair Patrice Genevet Tobias Zederbauer Hermann Detz Aaron M Andrews Werner Schrenk Federico Capasso Marko Lončar Gottfried Strasser | 2016 | Light(Science & Applications)2016，5，1： | 2 |
| 3 | High-power directional emission from microlasers with chaotic resonators 显示文摘 | Claire Gmachl Federico Capasso Narimanov E E | 1998 | Science1998，280，： | 1 |
| 4 | Scalable, ultra-resistant structural colors based on network metamaterials显示文摘Structural colors have drawn wide attention for their potential as a future printing technology for various applications,ranging from biomimetic tissues to adaptive camouflage materials.However,an efficient approach to realize robust colors with a scalable fabrication technique is still lacking,hampering the realization of practical applications with this platform.Here,we develop a new approach based on large-scale network metamaterials that combine dealloyed subwavelength structures at the nanoscale with lossless,ultra-thin dielectric coatings.By using theory and experiments,we show how subwavelength dielectric coatings control a mechanism of resonant light coupling with epsilon-near-zero regions generated in the metallic network,generating the formation of saturated structural colors that cover a wide portion of the spectrum.Ellipsometry measurements support the efficient observation of these colors,even at angles of 70°.The network-like architecture of these nanomaterials allows for high mechanical resistance,which is quantified in a series of nano-scratch tests.With such remarkable properties,these metastructures represent a robust design technology for real-world,large-scale commercial applications. | Henning Galinski Gael Favraud Hao Dong Juan S Totero Gongora Grégory Favaro Max Döbeli Ralph Spolenak Andrea Fratalocchi Federico Capasso | 2016 | Light(Science & Applications)2016，5，1： | 1 |
| 5 | Giant intrinsic chiro-optical activity in planar dielectric nanostructures显示文摘The strong optical chirality arising from certain synthetic metamaterials has important and widespread applications in polarization optics,stereochemistry and spintronics.However,these intrinsically chiral metamaterials are restricted to a complicated three-dimensional(3D)geometry,which leads to significant fabrication challenges,particularly at visible wavelengths.Their planar two-dimensional(2D)counterparts are limited by symmetry considerations to operation at oblique angles(extrinsic chirality)and possess significantly weaker chiro-optical responses close to normal incidence.Here,we address the challenge of realizing strong intrinsic chirality from thin,planar dielectric nanostructures.Most notably,we experimentally achieve near-unity circular dichroism with~90%of the light with the chosen helicity being transmitted at a wavelength of 540 nm.This is the highest value demonstrated to date for any geometry in the visible spectrum.We interpret this result within the charge-current multipole expansion framework and show that the excitation of higher-order multipoles is responsible for the giant circular dichroism.These experimental results enable the realization of high-performance miniaturized chiro-optical components in a scalable manner at optical frequencies. | Alexander Y Zhu Wei Ting Chen Aun Zaidi Yao-Wei Huang Mohammadreza Khorasaninejad Vyshakh Sanjeev Cheng-Wei Qiu Federico Capasso | 2017 | Light(Science & Applications)2017，6，1： | 1 |
| 6 | Doping interface dipoles:tunable heterojunction barrier heights and band-edge discontinuities by molecular beam epitaxy显示文摘 | Federico Capasso ALFRED Y Khalid Mohammed | 1985 | Appl Phys Lett1985，46，7： | 1 |
| 7 | Broadband ZnO single-nanowire light-emitting diode显示文摘 | Bao Jiming Zimmler Mariano A Capasso Federico | 2006 | Nano Lett2006，6，8： | 1 |
| 8 | Quantum Cascade Izser显示文摘 | Jerome Faist Federico Capasso Deborah L Sivco | 1994 | Science1994，264，5158： | 1 |
| 9 | The Effect of a Silybin-Vitamin E-Phospholipid Complex on Nonalcoholic Fatty Liver Disease: A Pilot Study显示文摘 | Carmela Loguercio Alessandro Federico Marco Trappoliere Concetta Tuccillo Ilario de Sio Agnese Di Leva Marco Niosi Mauro Valeriano D'Auria Rita Capasso Camillo Del Vecchio Blanco | 2007 | Digestive Diseases and Sciences2007，，9： | 1 |
| 10 | Chapter 1 Quantum Cascade Laser显示文摘 | Jerome Faist Federico Capasso Carlo Sirtori Deborah L. Sivco Alfred Y. Cho | 2000 | Semiconductors and Semimetals2000，，： | 1 |
| 11 | Measured long-range repulsive Casimir-Lifshitz forces显示文摘 | MUNDAY J N CAPASSO FEDERICO PARSEGIAN V ADRIAN | 2000 | Nature2000，457，： | 1 |
| 12 | The Casimir Effect in Microstructured Geometries 显示文摘 | Alejandro W Rodriguez Federico Capasso Steven G Johnson | 2011 | Nphoton2011，5，： | 1 |
| 13 | Study of photocurrent generation in InP nanowire-based p+-i-n+ photodetectors显示文摘 | Vishal Jain Ali Nowzari Jesper Wallentin Magnus T. Borgstrom Maria E. Messing Damir Asoli Mariusz Graczyk Bemd Witzigmann Federico Capasso Lars Samuelson Hakan Pettersson | 2014 | Nano Research2014，7，4： | 0 |
| 14 | 量子电子器件显示文摘当半导体器件足够小时,不可避免地要出现量子效应,从而为制作多种量子器件开辟了崭新的领域. | Federico Capasso Sapriyo Datta 焦飞 | 1991 | 物理1991，20，2： | 0 |
| 15 | Selective excitation and imaging of ultraslow phonon polaritons in thin hexagonal boron nitride crystals显示文摘We selectively excite and study two new types of phonon-polariton guided modes that are found in hexagonal boron nitride thin flakes on a gold substrate.Such modes show substantially improved confinement and a group velocity that is hundreds of times slower than the speed of light,thereby providing a new way to create slow light in the midinfrared range with a simple structure that does not require nano-patterning.One mode is the fundamental mode in the first Restrahlen band of hexagonal boron nitride thin crystals on a gold substrate;the other mode is equivalent to the second mode of the second Restrahlen band of hexagonal boron nitride flakes that are suspended in vacuum.The new modes also couple efficiently with incident light at the hexagonal boron nitride edges,as we demonstrate experimentally using photo-induced force microscopy and scanning near-field optical microscopy.The high confinement of these modes allows for Purcell factors that are on the order of tens of thousands directly above boron nitride and a wide band,with new perspectives for enhanced light-matter interaction.Our findings demonstrate a new approach to engineering the dispersion of polaritons in 2D materials to improve confinement and light-matter interaction,thereby paving the way for new applications in mid-infrared nano-optics. | Antonio Ambrosio Michele Tamagnone Kundan Chaudhary Luis A.Jauregui Philip Kim William L.Wilson Federico Capasso | 2018 | Light(Science & Applications)2018，7，1： | 0 |
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