Currently, it is a challenge to obtain the highly stable optical trapping with low power and less damage. The fano resonance is in principle the interference between two resonant modes of distinct lifetimes. Aug 23, 2010 the steep dispersion of the fano resonance profile promises applications in sensors, lasing, switching, and nonlinear and slowlight devices. However, it remains challenging to achieve stable trapping with low incident laser intensity. Investigation of fano resonance in plasmonic nanostructures and metamaterials promises new applications nanowerk news nanostructures with fano resonance fabricated from plasmonic materials and metamaterials could give rise to a range of applications such as labelfree chemical and bioanalysis probes that are adaptable to highthroughput applications. Here, we demonstrate a fano resonant plasmonic nanostructure with the highest simulated and experimental qfactor values of 79 and 38, respectively. Fanoresonant, asymmetric, metamaterialassisted tweezers. Moshchalkov, interacting plasmonic nanostructures beyond the quasistatic limit. It reveals the role played by the electromagnetic modes and material losses in the system, and enables the engineering of fano resonances in arbitrary geome tries. A nano plasmonic sensor employing fano resonance in. Fano resonanceassisted plasmonic trapping of nanoparticles. Electrical modulation of fano resonance in plasmonic.
This effect is exploited in a graphenenanoantenna hybrid device where fano resonant plasmonic nanostructures are fabricated on top of a graphene sheet. Plasmonic clusters can support fano resonances, where the line shape characteristics are controlled by cluster geometry. Enhanced figure of merit in fano resonance based plasmonic. Change in quality factors qfactors of the fano resonance by substrate etching was also investigated in detail.
A dualdisk ring ddr structure with broken symmetry and weakly dissipating material, silver, is proposed to achieve fano resonance in visible wavelength range. Polarization dependent fano resonance in a metallic. Plasmonic devices based on fano resonance exhibit great sensitivity and large figure of merit fom 14,21. A number of other planar fano systems with resonant responses controllable by symmetry breaking of metamolecules have been recently proposed, including those based on metallic truncated nanoshells 77, plasmonic fano resonances in nanocrosses 78 and diskring plasmonic nanostructures with record values of quality factors 79, 80. Fano resonance in dualdisk ring plasmonic nanostructures. Here we introduce an infrared plasmonic surface based on a fano resonant asymmetric metamaterial exhibiting sharp resonances caused by. Fano resonances in the nonlinear optical response of coupled. The steep dispersion of the fano resonance profile promises applications in sensors, lasing, switching, and nonlinear and slowlight devices. Maier and naomi j halas and peter j nordlander and harald giessen and chong tow chong, journalnature materials, year2010. Although, sensitivity is an important parameter of sensor to detect the. In this paper, we propose fano resonance assisted selfinduced backaction. Fano resonances have been studied in a broad variety of complex plasmonic nanostructures and metamaterials, their analysis relies.
Fano like resonance in largearea magnetic metamaterials fabricated by the nanoimprint technique xia zhang1, hui liu2, yunjie xia1, qiang wang2, fufang su1, xuebo sun1, xin dong1, yan li1, and shining zhu2. We will then also show that this enables experimental observation of a. Wudeng wang, yudong li, jingyang peng, zongqiang chen, jun qian, jing chen, jingjun xu and qian sun. Gao3 1college of electronic and information engineering, shenzhen graduate school, harbin institute of technology, xili, shenzhen 518055, china. Fanolike resonance in largearea magnetic metamaterials. Plasmonic fano resonances, which arise from the coupling and the interference of the superradiant and the subradiant surface plasmon modes in metal micro nanostructures 12 3 4, have been.
Polarization dependent fano resonance in a metallic triangle embedded in split ring plasmonic nanostructures. Martin nanophotonics and metrology laboratory nam, swiss fe deral institute of technology lausanne epfl, 1015. Mechanism of the fano resonance in a planar metamaterials arxiv. It is named after italianamerican physicist ugo fano, who in 1961 gave a theoretical explanation for the scattering lineshape of inelastic scattering of electrons from. The shape of this resonance is distinctively different from that of conventional symmetric resonance curves. Fano resonances in thz metamaterials composed of continuous metallic wires and split ring resonators zhaofeng li,1,3, semih cakmakyapan,1 bayram butun,1 christina daskalaki,2 stelios tzortzakis,2,4 xiaodong yang,3,5 and ekmel ozbay1,6 1nanotechnology research center, and department of physics, and department of electrical and electronics. It reveals the role played by the electromagnetic modes and material losses in the system, and enables the engineering of fano resonances in arbitrary geometries. Abstract mechanism of the fano resonances in planar metamaterials. Lukyanchuk b1, zheludev ni, maier sa, halas nj, nordlander p, giessen h, chong ct. Plasmonic multibowtie aperture antenna with fano resonance. A nano plasmonic sensor employing fano resonance in 1d nanogratings patterned on ultra thin ag films offers the sensing resolution of 1. The subradiant mode of fano resonance can result in significant nearfield enhancement due to its light trapping capability into the socalled hotspots. Fano resonances in plasmonic nanostructures infoscience.
Among these structures, plasmonic oligomers consisting of packed metallic nanoelements with certain configurations have been of significant interest. Improvement of sensitivity to the refractive index environment was demonstrated by using plasmonic metamaterials with fano resonance based on far field interference. Investigation of fano resonance in plasmonic nanostructures. Fanoenhanced pulling and pushing optical force on active. A proper combination of plasmonic nanostructures can support fano resonances arising from the interference between a nonradiative mode and a continuum of radiative electromagnetic waves. Maier and naomi j halas and peter j nordlander and harald giessen and chong tow. The asymmetrical nature of fano resonance is also tested in a plasmonic structure coupled to mim waveguide. Infrared plasmonic metamaterials are especially attractive because their resonant response can be accurately tuned to that of the vibrational modes of the target biomolecules. May 05, 2016 plasmonic devices based on fano resonance exhibit great sensitivity and large figure of merit fom 14,21. Jul 19, 2011 we introduce an ultrasensitive labelfree detection technique based on asymmetric fano resonances in plasmonic nanoholes with far reaching implications for pointofcare diagnostics. Fano resonances in plasmonic nanostructures although fano resonances occur in light scattering from simple spherical particles, the damping of typical metals is too large for the fano resonance to. Fano resonance is also observed in metamaterials and plasmonic nanostructures and could be explained by the coupling of two classical lorentz oscillators.
Fano resonances in thz metamaterials composed of continuous metallic wires and split ring resonators zhaofeng li,1,3, semih cakmakyapan,1 bayram butun,1 christina daskalaki,2 stelios tzortzakis,2,4 xiaodong yang,3,5 and ekmel ozbay1,6 1nanotechnology research center, and department of physics, and department of electrical and electronics engineering, bilkent university, bilkent, 06800 ankara. Infrared plasmonic metamaterials are especially attractive because their. Appearance of these highly localized hotspots at the excitation and or stokes wavelengths of the analytes makes such oligomers promising sers active. Plasmonic nanostructures overcome abbes diffraction limit to create strong gradient electric fields, enabling efficient optical trapping of nanoparticles. Fano resonance in novel plasmonic nanostructures request pdf. Ab initio theory of fano resonances in plasmonic nanostructures. Fano resonances in thz metamaterials composed of continuous. Osa influence of fano resonance on sers enhancement in fano.
As the structural symmetry of the metamaterial is broken a fano resonance evolves in the lowfrequency flank of the symmetric fundamental dipole mode resonance. Fano resonance based on metalinsulatormetal waveguide. Nov, 2011 plasmonic nanostructures are known to be an attractive platform for highly sensitive molecular sensors, although they often lack specificity. We introduce an ultrasensitive labelfree detection technique based on asymmetric fano resonances in plasmonic nanoholes with far reaching implications for pointofcare diagnostics.
Fano resonance induced by magnetic toroidal moment in hybrid plasmonicdielectric nanostructures junjun xiao1. Steep dispersion of the plasmonic fano resonance profiles. The fano resonance in plasmonic nanostructures and metamaterials, nat. Recently, the fano resonance has been found in plasmonic nanoparticles, photonic crystals, and electromagnetic metamaterials. Fano resonance induced by magnetic toroidal moment in hybrid. In this paper, we propose fano resonanceassisted selfinduced backaction. Investigation of fano resonance in plasmonic nanostructures and metamaterials promises new applications nanowerk news nanostructures with fano resonance fabricated from plasmonic materials and metamaterials could give rise to a range of applications such as labelfree chemical and bioanalysis probes that are adaptable to highthroughput applications, electronicsfree.
Osa influence of fano resonance on sers enhancement in. An ab initio theory for fano resonances in plasmonic nanostructures and metamaterials is developed using feshbach formalism. Recently, the fano resonance has been found in plasmonic nanoparticles, photonic crystals, and electro magnetic metamaterials. It is shown theoretically and numerically that a simple gratingsbased. Pdf the fano resonance in plasmonic nanostructures and.
Optical fano resonance of an individual semiconductor. Fano resonance induced by magnetic toroidal moment in hybrid plasmonic dielectric nanostructures junjun xiao1. Double fano resonance in a plasmonic double grating structure. Polarization dependent fano resonance in a metallic triangle. Surface plasmons are able to generate extremely strong and confined optical fields at a deepsubwavelength scale, far beyond the diffraction limit, and now play a central role in nanosciences. Integration of fano resonance into nonlinear optics is. Plasmonic nanostructures have gained much attention due to their ability to confine, tune and manipulate light for specific applications simply by varying their geometries and local dielectric.
Impact of substrate etching on plasmonic elements and. Appearance of these highly localized hotspots at the excitation andor stokes wavelengths of the analytes makes such oligomers promising sers active. By exploiting extraordinary light transmission phenomena through highquality factor q solution. Fanolike resonance in largearea magnetic metamaterials fabricated by the nanoimprint technique xia zhang1, hui liu2, yunjie xia1, qiang wang2, fufang su1, xuebo sun1, xin dong1, yan li1, and shining zhu2 1shandong province key lab of laser polarization and information, qufu normal university, qufu 273165, peoples republic of china 2national laboratory of solid state microstructures. Fano resonance, viewed as a quantum interference between continuum and discrete states, demonstrates an asymmetric spectral line shape. Recently, the fano resonance has been found in plasmonic nanoparticles, photonic crystals, and electromagnetic. Fano resonance in novel plasmonic nanostructures rahmani. As a spectacular demonstration of the extraordinary sensitivity and the quality of the fabricated biosensors, we show. Fano resonance in plasmonic nanostructures and metamaterials, nat. The fano resonance in plasmonic nanostructures and metamaterials. The use of fano resonant elements enhances the interaction of incident radiation with the graphene sheet and enables efficient electrical modulation of the plasmonic resonance. When this structure is incorporated into an uniquely.
Fanoresonant asymmetric metamaterials for ultrasensitive spectroscopy and identi. The insights into the physical understanding of fano resonances gained this way will be of great interest for the design of plasmonic sensing platforms and metamaterials. The plasmonic nanostructure containing a spherical core with optical gain and a metallic shell shows much larger optical pulling force than a pure gain sphere. It can play a vital role to extend optical manipulation tools from micrometer to nanometer scale level. Fano resonance induced by magnetic toroidal moment in. The spiral nature of rad depicts the asymmetrical nature in resonance spectrum. Fano resonances in the nonlinear optical response of. Fano resonances have been observed in various dielectric or plasmonic nanostructures such as metamaterials 26, oligomers 7. The interference between these plasmonic modes can result in strong fano resonance. Plasmonic sensing and modulation based on fano resonances. Gao3 1college of electronic and information engineering, shenzhen graduate school, harbin institute of. Analysis of transition from lorentz resonance to fano. Symmetry breaking of a metallic ring is realized by placing two disks inside the ring. The high q fano resonances are enabled by the excitation of.
A variety of fano resonant nanostructures ranging from periodic planar arrays to simple clusters. Plasmonic oligomers can provide profound fano resonance in their scattering responses. The excitation of the fano resonance is interpreted in terms of coupling of the ring and the dualdisk plasmonic modes. Recently, a large number of experimental and theoretical works have revealed a variety of plasmonic nanostructures with the capabilities of fano resonance fr generation. Fanoresonant plasmonic metamaterials and their applications. Here we show that clusters with a hemicircular central disk surrounded by a circular ring of closely spaced, coupled nanodisks yield fanolike and nonfanolike spectra for orthogonal incident polarization orientations. It is named after italianamerican physicist ugo fano, who in 1961 gave a theoretical explanation for the scattering line. At last, the development and challenges of plasmonic sensing and modulation based on fano resonances are discussed. We observe electrically controlled damping in the fano resonances. Sharp fano resonances in thz metamaterials oklahoma state. Plasmonic nanostructures are known to be an attractive platform for highly sensitive molecular sensors, although they often lack specificity.
Here, we demonstrate fano resonance assisted plasmonic optical tweezers for single nanoparticle trapping in an array of asymmetrical split. A plasmonic fano switch nano letters acs publications. Fanoresonant asymmetric metamaterials for ultrasensitive. Published 21 february 2014 2014 iop publishing ltd journal of optics, volume 16, number 3.
Here we show that clusters with a hemicircular central disk surrounded by a circular ring of closely spaced, coupled nanodisks yield fano like and non fano like spectra for orthogonal incident polarization orientations. Jun 28, 2016 plasmonic optical trapping is widely applied in the field of bioscience, microfluidics, and quantum optics. Through the fano resonance, the electromagnetic energy can be trapped in the so called dark mode and induce strong local field enhancement. In complex plasmonic systems, usually, two or more resonant modes exist. The fano resonance in plasmonic nanostructures and. Analysis of asymmetry of fano resonance in plasmonic metal. Since its discovery, the asymmetric fano resonance has been a characteristic feature of interacting quantum systems. Recent years, manipulating the scattering signature of objects using metamaterials and plasmonics, is one of research hotspots. The plasmonic nanostructure containing a spherical core with optical gain and a metallic shell shows much larger optical pulling force than a pure. Linear and nonlinear fano resonance on twodimensional. Tuning fano resonance by plasmonic coreshell nanostructure. Plasmonic optical trapping is widely applied in the field of bioscience, microfluidics, and quantum optics.
Interference between a background and a resonant scattering process produces the asymmetric lineshape. Fanoresonance in hybrid metalgraphene metamaterial. Fano resonance response, magnetic plasmon resonance for waveguiding and hot electron induced photochemistry. Fano resonances have been studied in a broad variety of complex plasmonic nanostructures and metamaterials, their analysis relies either on a classical oscillator model,16,17 phenomenological models,4,18 a coupledmode formalism,19 or the quantummechanical approach used by fano1 to. Fano resonances in the nonlinear optical response of coupled plasmonic nanostructures jeremy butet and olivier j. Jan 12, 2016 fano resonance, viewed as a quantum interference between continuum and discrete states, demonstrates an asymmetric spectral line shape. We demonstrate tunable pulling and pushing optical forces on plasmonic nanostructures around fano resonance. In physics, a fano resonance is a type of resonant scattering phenomenon that gives rise to an asymmetric lineshape. Especially the fano resonance based on the coupling of different, orthogonal scattering orders of the plasmonic nanoparticle is attracting great attention due to its broaden applications in optical switching, chemical and biological.
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