The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
F J Garciavidal - One of the best experts on this subject based on the ideXlab platform.
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theory of strong coupling between quantum emitters and propagating Surface Plasmons
Physical Review Letters, 2013Co-Authors: A Gonzaleztudela, Paloma A. Huidobro, L Martinmoreno, C Tejedor, F J GarciavidalAbstract:Here we present the theoretical foundation of the strong coupling phenomenon between quantum emitters and propagating Surface Plasmons observed in two-dimensional metal Surfaces. For that purpose, we develop a quantum framework that accounts for the coherent coupling between emitters and Surface Plasmons and incorporates the presence of dissipation and dephasing. Our formalism is able to reveal the key physical mechanisms that explain the reported phenomenology and also determine the physical parameters that optimize the strong coupling. A discussion regarding the classical or quantum nature of this phenomenon is also presented.
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conformal Surface Plasmons propagating on ultrathin and flexible films
Proceedings of the National Academy of Sciences of the United States of America, 2013Co-Authors: Xiaopeng Shen, Tie Jun Cui, Diego Martincano, F J GarciavidalAbstract:Surface plasmon polaritons (SPPs) are localized Surface electromagnetic waves that propagate along the interface between a metal and a dielectric. Owing to their inherent subwavelength confinement, SPPs have a strong potential to become building blocks of a type of photonic circuitry built up on 2D metal Surfaces; however, SPPs are difficult to control on curved Surfaces conformably and flexibly to produce advanced functional devices. Here we propose the concept of conformal Surface Plasmons (CSPs), Surface plasmon waves that can propagate on ultrathin and flexible films to long distances in a wide broadband range from microwave to mid-infrared frequencies. We present the experimental realization of these CSPs in the microwave regime on paper-like dielectric films with a thickness 600-fold smaller than the operating wavelength. The flexible paper-like films can be bent, folded, and even twisted to mold the flow of CSPs.
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superradiance mediated by graphene Surface Plasmons
Physical Review B, 2012Co-Authors: Paloma A. Huidobro, Alexey Y Nikitin, Carlos Gonzalezballestero, L Martinmoreno, F J GarciavidalAbstract:We demonstrate that the interaction between two emitters can be controlled by means of the efficient excitation of Surface plasmon modes in graphene. We consider graphene Surface Plasmons supported by either twodimensional graphene sheets or one-dimensional graphene ribbons, showing in both cases that the coupling between the emitters can be strongly enhanced or suppressed. The super- and subradiant regimes are investigated in the reflection and transmission configurations. Importantly, the length scale of the coupling between emitters, which in vacuum is fixed by the free-space wavelength, is now determined by the wavelength of the graphene Surface Plasmons, which can be extremely short and can be tuned at will via a gate voltage.
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efficient unidirectional nanoslit couplers for Surface Plasmons
Nature Physics, 2007Co-Authors: F Lopeztejeira, Eloise Devaux, Thomas W Ebbesen, L Martinmoreno, F J Garciavidal, Joachim R Krenn, Sergio G Rodrigo, Ilya P Radko, Sergey I Bozhevolnyi, M U GonzalezAbstract:The emerging field of plasmonics is based on exploiting the coupling between light and collective electronic excitations within conducting materials known as Surface Plasmons. Because the so-called Surface plasmon polariton (SPP) modes that arise from this coupling are not constrained by the optical diffraction limit, it is hoped that they could enable the construction of ultracompact optical components1,2. But in order that such potential can be realized, it is vital that the relatively poor light–SPP coupling be improved. This is made worse by the fact that the incident light that is conventionally used to launch SPPs in a metal film 3,4,5,6 is a significant source of noise, unless directed away from a region of interest, which then decreases the signal and increases the system’s size. Back-side illumination of subwavelength apertures in optically thick metal films7,8,9,10,11,12,13 eliminates this problem but does not ensure a unique propagation direction for the SPP. We propose a novel back-side slit-illumination method that incorporates a periodic array of grooves carved into the front side of a thick metal film. Bragg reflection enhances the propagation of SPPs away from the array, enabling them to be unidirectionally launched from, and focused to, a localized point.
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scattering of Surface Plasmons by one dimensional periodic nanoindented Surfaces
Physical Review B, 2005Co-Authors: F Lopeztejeira, F J Garciavidal, L MartinmorenoAbstract:In this work, the scattering of Surface Plasmons by a finite periodic array of one-dimensional grooves is theoretically analyzed by means of a modal expansion technique. We have found that the geometrical parameters of the array can be properly tuned to achieve optimal performance of the structure either as a Bragg reflector or as a converter of Surface Plasmons into light. In this last case, the emitted light is collimated within a few degrees cone. Importantly, we also show that a small number of indentations in the array are sufficient to fully achieve its functional capabilities.
Thomas W Ebbesen - One of the best experts on this subject based on the ideXlab platform.
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Surface plasmon interferometry: measuring group velocity of Surface Plasmons.
Optics letters, 2007Co-Authors: Vasily V. Temnov, Eloise Devaux, Ulrike Woggon, José Dintinger, Thomas W EbbesenAbstract:Optical transmission spectroscopy on metal films with slit-groove pairs is conducted. Spectra of the light transmitted through the slit exhibit Fabry-Perot-type interference fringes due to Surface Plasmons propagating between the slit and the groove. The spectral dependence of the period of interference fringes is used to determine the group velocity of Surface Plasmons on flat gold and silver Surfaces.
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efficient unidirectional nanoslit couplers for Surface Plasmons
Nature Physics, 2007Co-Authors: F Lopeztejeira, Eloise Devaux, Thomas W Ebbesen, L Martinmoreno, F J Garciavidal, Joachim R Krenn, Sergio G Rodrigo, Ilya P Radko, Sergey I Bozhevolnyi, M U GonzalezAbstract:The emerging field of plasmonics is based on exploiting the coupling between light and collective electronic excitations within conducting materials known as Surface Plasmons. Because the so-called Surface plasmon polariton (SPP) modes that arise from this coupling are not constrained by the optical diffraction limit, it is hoped that they could enable the construction of ultracompact optical components1,2. But in order that such potential can be realized, it is vital that the relatively poor light–SPP coupling be improved. This is made worse by the fact that the incident light that is conventionally used to launch SPPs in a metal film 3,4,5,6 is a significant source of noise, unless directed away from a region of interest, which then decreases the signal and increases the system’s size. Back-side illumination of subwavelength apertures in optically thick metal films7,8,9,10,11,12,13 eliminates this problem but does not ensure a unique propagation direction for the SPP. We propose a novel back-side slit-illumination method that incorporates a periodic array of grooves carved into the front side of a thick metal film. Bragg reflection enhances the propagation of SPPs away from the array, enabling them to be unidirectionally launched from, and focused to, a localized point.
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Measuring group velocity of Surface Plasmons by Surface plasmon interferometry
2007 Quantum Electronics and Laser Science Conference, 2007Co-Authors: Vasily V. Temnov, Eloise Devaux, Ulrike Woggon, José Dintinger, Thomas W EbbesenAbstract:Broadband optical transmission spectra of metal films with subwavelength slit-groove pairs show pronounced interference fringes by Surface Plasmons travelling between slits and grooves. Interferometric fringe analysis provides accurate values for group velocity of Surface Plasmons.
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launching and decoupling Surface Plasmons via micro gratings
Applied Physics Letters, 2003Co-Authors: Eloise Devaux, Thomas W Ebbesen, Jeanclaude Weeber, Alain DereuxAbstract:Controlling separately the launching of Surface Plasmons and their recovery as freely propagating light is essential for the development of Surface plasmon photonic circuits. With this target in mind, we have studied in the near-field the launching of Surface Plasmons in a well-defined direction by micro-arrays of subwavelength holes milled in a thick metal film. We show that Surface Plasmons can then be converted back to freely propagating light by means of another appropriately designed array. These results not only provide insight into the efficient decoupling of Surface Plasmons but also into their role in the enhanced transmission mechanism.
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Surface Plasmons enhance optical transmission through subwavelength holes
Physical Review B, 1998Co-Authors: H F Ghaemi, Thomas W Ebbesen, T Thio, Daniel E Grupp, Henri J LezecAbstract:Optically thick metal films perforated with a periodic array of subwavelength holes show exceptional transmission properties. The zero-order transmission spectra exhibit well-defined maxima and minima of which the positions are determined by the geometry of the hole array. We show that the minima are the collection of loci for Wood’s anomaly, which occurs when a diffracted beam becomes tangent to the film, and that the maxima are the result of a resonant excitation of Surface Plasmons ~SP’s !. SP’s from both Surfaces of the metal film are apparent in the dispersion diagram, independent of which side of the film is illuminated, indicating an anomalously strong coupling between the two sides. This leads to wavelength-selective transmission with efficiencies that are about 1000 times higher than that expected for subwavelength holes. @S0163-1829~98!06332-2# On the Surface of a metal, collective excitations of the electron density lead to the formation of Surface plasmon ~SP! polaritons. 1 Light in the visible to near-infrared range does not couple to Surface Plasmons on a smooth metal-air interface; however, a periodic structure allows the optical probing of the Surface plasmon dispersion, in a well-defined Brillouin zone. SP polaritons have in general been observed in reflection mode on metallized gratings, appearing as an absorption feature in the intensity of a diffracted order, allowing the study of the band structure. 2‐8 Recently, we reported on the highly unusual transmission properties of metal films perforated with a periodic array of subwavelength holes. 9 In these samples the interaction of the incident radiation with the Surface Plasmons leads to an enhancement of the transmission. The zero-order transmission spectra are characterized by well-defined maxima and minima of which the positions are determined by the geometry of the hole array. Most surprisingly, we have observed transmission at wavelengths up to ten times the hole diameter with efficiencies that can exceed unity when normalized to the area of the holes, where standard aperture theory 10 predicts a transmission efficiency of order 10 23 . In this article we analyze the zero-order transmission spectra in a significant fraction of the Brillouin zone. We have identified the minima as being due to Wood’s anomaly, 11 which is observed in diffraction gratings when a diffracted order becomes tangent to the plane of the grating. We further show that the transmission maxima are the result of a resonant excitation of Surface Plasmons. Moreover, we demonstrate that the Surface Plasmons on both sides of the metal film are excited equally strongly by the incident light. This implies that the very high transmission efficiencies observed are related to an anomalously strong coupling of the SP modes on both sides of the metal film through the holes. The samples are optically thick Ag films of thickness 0.2
Xiaopeng Shen - One of the best experts on this subject based on the ideXlab platform.
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Magnetic localized Surface Plasmons
Physical Review X, 2014Co-Authors: Paloma A. Huidobro, Luis Martín-moreno, Francisco J. Garcia-vidal, Xiaopeng Shen, Javier Cuerda, Esteban Moreno, Tie Jun Cui, John B. PendryAbstract:Surface Plasmons, electromagnetic fields generated by the charge oscillations at the Surface of a light-illuminated metallic nanoparticle, are typically described in terms of effective electric dipoles and their dynamics. Scientists discover that adding periodic grooves to the Surface of subwavelength metallic disks creates localized Surface Plasmons of magnetic character in addition to the typical electric ones.
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ultrathin plasmonic metamaterial for spoof localized Surface Plasmons
Laser & Photonics Reviews, 2014Co-Authors: Xiaopeng Shen, Tie Jun CuiAbstract:The multipolar spoof localized Surface Plasmons (LSPs) on a planar textured metallic disk are proposed and experimentally demonstrated at microwave frequencies. Based on ultrathin metal film printed on a thin dielectric substrate, the designed plasmonic metamaterial clearly shows multipolar plasmonic resonances, including the dipole, quadrupole, hexapole, octopole, decapole, dodecapole, and quattuordecpole modes. Both numerical simulations and experiments are in good agreement. It is shown that the spoof LSP resonances are sensitive to the disk's geometry and local dielectric environments. Hence, the ultrathin textured metallic disk may be used as plasmonic sensors and find potential applications in the microwave and terahertz frequencies.
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conformal Surface Plasmons propagating on ultrathin and flexible films
Proceedings of the National Academy of Sciences of the United States of America, 2013Co-Authors: Xiaopeng Shen, Tie Jun Cui, Diego Martincano, F J GarciavidalAbstract:Surface plasmon polaritons (SPPs) are localized Surface electromagnetic waves that propagate along the interface between a metal and a dielectric. Owing to their inherent subwavelength confinement, SPPs have a strong potential to become building blocks of a type of photonic circuitry built up on 2D metal Surfaces; however, SPPs are difficult to control on curved Surfaces conformably and flexibly to produce advanced functional devices. Here we propose the concept of conformal Surface Plasmons (CSPs), Surface plasmon waves that can propagate on ultrathin and flexible films to long distances in a wide broadband range from microwave to mid-infrared frequencies. We present the experimental realization of these CSPs in the microwave regime on paper-like dielectric films with a thickness 600-fold smaller than the operating wavelength. The flexible paper-like films can be bent, folded, and even twisted to mold the flow of CSPs.
Tie Jun Cui - One of the best experts on this subject based on the ideXlab platform.
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Magnetic localized Surface Plasmons
Physical Review X, 2014Co-Authors: Paloma A. Huidobro, Luis Martín-moreno, Francisco J. Garcia-vidal, Xiaopeng Shen, Javier Cuerda, Esteban Moreno, Tie Jun Cui, John B. PendryAbstract:Surface Plasmons, electromagnetic fields generated by the charge oscillations at the Surface of a light-illuminated metallic nanoparticle, are typically described in terms of effective electric dipoles and their dynamics. Scientists discover that adding periodic grooves to the Surface of subwavelength metallic disks creates localized Surface Plasmons of magnetic character in addition to the typical electric ones.
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ultrathin plasmonic metamaterial for spoof localized Surface Plasmons
Laser & Photonics Reviews, 2014Co-Authors: Xiaopeng Shen, Tie Jun CuiAbstract:The multipolar spoof localized Surface Plasmons (LSPs) on a planar textured metallic disk are proposed and experimentally demonstrated at microwave frequencies. Based on ultrathin metal film printed on a thin dielectric substrate, the designed plasmonic metamaterial clearly shows multipolar plasmonic resonances, including the dipole, quadrupole, hexapole, octopole, decapole, dodecapole, and quattuordecpole modes. Both numerical simulations and experiments are in good agreement. It is shown that the spoof LSP resonances are sensitive to the disk's geometry and local dielectric environments. Hence, the ultrathin textured metallic disk may be used as plasmonic sensors and find potential applications in the microwave and terahertz frequencies.
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conformal Surface Plasmons propagating on ultrathin and flexible films
Proceedings of the National Academy of Sciences of the United States of America, 2013Co-Authors: Xiaopeng Shen, Tie Jun Cui, Diego Martincano, F J GarciavidalAbstract:Surface plasmon polaritons (SPPs) are localized Surface electromagnetic waves that propagate along the interface between a metal and a dielectric. Owing to their inherent subwavelength confinement, SPPs have a strong potential to become building blocks of a type of photonic circuitry built up on 2D metal Surfaces; however, SPPs are difficult to control on curved Surfaces conformably and flexibly to produce advanced functional devices. Here we propose the concept of conformal Surface Plasmons (CSPs), Surface plasmon waves that can propagate on ultrathin and flexible films to long distances in a wide broadband range from microwave to mid-infrared frequencies. We present the experimental realization of these CSPs in the microwave regime on paper-like dielectric films with a thickness 600-fold smaller than the operating wavelength. The flexible paper-like films can be bent, folded, and even twisted to mold the flow of CSPs.
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bidirectional bending splitter of designer Surface Plasmons
Applied Physics Letters, 2011Co-Authors: Yong Jin Zhou, Quan Jiang, Tie Jun CuiAbstract:We propose and experimentally verify a bidirectional bending splitter of designer Surface Plasmons which is composed of two metallic gratings of trapezoid grooves. A metal wire is used to excite the designer Surface Plasmons propagating along the gratings. A full-wave numerical method has been used to simulate the performance of the bending splitter. The experimental verifications in the microwave frequencies have excellent agreements to the simulations. It is demonstrated that the splitter can not only split the electromagnetic waves at different frequencies, but also guide the electromagnetic waves effectively for large-angle bending.
Eloise Devaux - One of the best experts on this subject based on the ideXlab platform.
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Surface plasmon interferometry: measuring group velocity of Surface Plasmons.
Optics letters, 2007Co-Authors: Vasily V. Temnov, Eloise Devaux, Ulrike Woggon, José Dintinger, Thomas W EbbesenAbstract:Optical transmission spectroscopy on metal films with slit-groove pairs is conducted. Spectra of the light transmitted through the slit exhibit Fabry-Perot-type interference fringes due to Surface Plasmons propagating between the slit and the groove. The spectral dependence of the period of interference fringes is used to determine the group velocity of Surface Plasmons on flat gold and silver Surfaces.
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efficient unidirectional nanoslit couplers for Surface Plasmons
Nature Physics, 2007Co-Authors: F Lopeztejeira, Eloise Devaux, Thomas W Ebbesen, L Martinmoreno, F J Garciavidal, Joachim R Krenn, Sergio G Rodrigo, Ilya P Radko, Sergey I Bozhevolnyi, M U GonzalezAbstract:The emerging field of plasmonics is based on exploiting the coupling between light and collective electronic excitations within conducting materials known as Surface Plasmons. Because the so-called Surface plasmon polariton (SPP) modes that arise from this coupling are not constrained by the optical diffraction limit, it is hoped that they could enable the construction of ultracompact optical components1,2. But in order that such potential can be realized, it is vital that the relatively poor light–SPP coupling be improved. This is made worse by the fact that the incident light that is conventionally used to launch SPPs in a metal film 3,4,5,6 is a significant source of noise, unless directed away from a region of interest, which then decreases the signal and increases the system’s size. Back-side illumination of subwavelength apertures in optically thick metal films7,8,9,10,11,12,13 eliminates this problem but does not ensure a unique propagation direction for the SPP. We propose a novel back-side slit-illumination method that incorporates a periodic array of grooves carved into the front side of a thick metal film. Bragg reflection enhances the propagation of SPPs away from the array, enabling them to be unidirectionally launched from, and focused to, a localized point.
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Measuring group velocity of Surface Plasmons by Surface plasmon interferometry
2007 Quantum Electronics and Laser Science Conference, 2007Co-Authors: Vasily V. Temnov, Eloise Devaux, Ulrike Woggon, José Dintinger, Thomas W EbbesenAbstract:Broadband optical transmission spectra of metal films with subwavelength slit-groove pairs show pronounced interference fringes by Surface Plasmons travelling between slits and grooves. Interferometric fringe analysis provides accurate values for group velocity of Surface Plasmons.
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Optimization of Surface Plasmons launching from subwavelength hole arrays: modelling and experiments
Optics Express, 2007Co-Authors: J. Laluet, Eloise Devaux, Alain Dereux, Cyriaque Genet, Thomas Ebbesen, Jeanclaude WeeberAbstract:The launching of Surface Plasmons by micro-gratings of subwavelength apertures milled in a thick metal film is important for the development of Surface plasmon based circuits. By comparing the near-field optical images of such Surface plasmon sources with the results of a Huygens-Fresnel principle based scattering model, we show that the properties of the locally launched SP beams such as divergence or uniformity can be tuned by adjusting the shape of the micro-gratings. This allows us to propose an optimized source array well adapted for providing a narrow, collimated and uniform beam. (c) 2007 Optical Society of America.
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launching and decoupling Surface Plasmons via micro gratings
Applied Physics Letters, 2003Co-Authors: Eloise Devaux, Thomas W Ebbesen, Jeanclaude Weeber, Alain DereuxAbstract:Controlling separately the launching of Surface Plasmons and their recovery as freely propagating light is essential for the development of Surface plasmon photonic circuits. With this target in mind, we have studied in the near-field the launching of Surface Plasmons in a well-defined direction by micro-arrays of subwavelength holes milled in a thick metal film. We show that Surface Plasmons can then be converted back to freely propagating light by means of another appropriately designed array. These results not only provide insight into the efficient decoupling of Surface Plasmons but also into their role in the enhanced transmission mechanism.
