Subradiant Plasmon Modes in Multilayer Metal–Dielectric Nanoshells

Wang, Meng; Cao, Min; Chen, Xin; Gu, Ning

doi:10.1021/jp205736d

Cited by 47 publications

(45 citation statements)

References 32 publications

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“…In these complex nanostructures, subradiant modes, which cannot be directly excited by incident light, can be obtained via the coupling interaction of parent plasmons. Subradiant modes are spectrally narrow without the radiative damping [22,26,27]. Different from subradiant modes, superradiant modes corresponding to symmetrically coupling (bonding) are able to couple with the incident light directly and easily and present a broadband because of the radiative damping and the imaginary part of the dielectric function of the metal [22].…”

Section: Introductionmentioning

confidence: 99%

“…Different from subradiant modes, superradiant modes corresponding to symmetrically coupling (bonding) are able to couple with the incident light directly and easily and present a broadband because of the radiative damping and the imaginary part of the dielectric function of the metal [22]. The low-energy bonding superradiant mode coupling to higher-order subradiant modes could lead to Fano resonances by controlling symmetry breaking, particularly in shellcore particles by displacing the center particle with respect to the center of the surrounding ring or shell [22,26,27] or multi-shell nanostructures [27]. Two types of symmetry breaking are usually found to introduce the coupling between the superradiant and subradiant modes.…”

Section: Introductionmentioning

confidence: 99%

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Subradiant, Superradiant Plasmon Modes and Fano Resonance in a Multilayer Nanocylinder Array Standing on a Thin Metal Film

Cai

Liu

et al. 2015

Plasmonics

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The optical properties of a novel nanostructure consisting of a hexagonal array of aligned vertically threelayered metal-dielectric-metal nanodisks on a silver film are theoretically studied through the finite-difference time-domain method. The novel nanostructure exhibits three obvious optical transmission bands due to the excitation of subradiant plasmon modes, superradiant plasmon modes, and Fano resonances. Surface plasmon polaritons of the underlying Ag film also play a significant role on these three optical transmission bands via coupling with localized surface plasmons of nanodisk pairs. Moreover, the nanostructure also exhibits a good tunability of optical response by modifying the sizes of cylinders, the thickness of underlying metal film, and the dielectric constant of middle layer. These results demonstrate the nanostructure with great advantages in optical sensors and filters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Subradiant, Superradiant Plasmon Modes and Fano Resonance in a Multilayer Nanocylinder Array Standing on a Thin Metal Film

Cai

Liu

et al. 2015

Plasmonics

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“…The plasmon resonances of Au nanoshells depend dramatically on the geometric parameters and local dielectric environment. Recently, the Au-silica-Au multilayer nanoshells have been fabricated and widely studied [5][6][7][8][9][10][11][12][13][14][15][16][17]. Compared with Au nanoshell, the Au-silica-Au nanoshells can provide more abundant and tunable plasmon resonances because of the interaction between the plasmon resonance mode of the inner Au sphere and the outer Au shell, as explained by plasmon hybridization theory [18].…”

Section: Introductionmentioning

confidence: 99%

Dual Symmetry Breaking in Gold-Silica-Gold Multilayer Nanoshells

et al. 2014

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In this study, the optical properties induced by dual symmetry breaking including both shell cutting and core offsetting in the gold-silica-gold multilayer nanoshells have been studied by the discrete dipole approximation simulations and the plasmon hybridization theory. The influences of the incident polarization and geometrical parameters on the plasmon resonances of these dual-symmetry-breaking Au-silicaAu multilayer nanoshells (DSMNS) are investigated. Under the combined effect of the two types of symmetry breaking, it is found that the polarization-dependent multiple plasmon resonances can be induced in the DSMNS. By changing the polarization of 90 o , the switching of the two transparency windows can be flexibly adjusted in the DSMNS with different types of Au core offsetting. This polarization-controlled transparency is likely to generate a wide range of photonic applications such as filters and color displays. Furthermore, the local refractive index sensitivity of the DSMNS is also investigated, and the triple extinction peaks simultaneous shift is found as the surrounding medium changed, which suggests the potential applications for biological sensors.

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“…The TE wave propagating through the ACNW array can be studied by using the 2D-FEM [34]. The FEM has been proved to be an efficient numerical tool to investigate the optical properties of the metallic nanostructures [35][36][37]. We calculate the scattering parameters S 11 and S 21 of the ACNW array.…”

Section: Electromagnetic Scattering Modelmentioning

confidence: 99%

Plasmon–exciton induced transparency in plexcitonic Ag–CuCl-coated nanowires and associated arrays

Jiang

Xie

2015

Appl. Phys. B

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when they are in close proximity [5,7]. The weak couplings between the plasmon and exciton resonances can lead to the induced transparency, enhanced absorption, increased emission, and increased optical nonlinearity [4,[8][9][10][11][12][13]. The strong plasmon-exciton couplings will modify the responses of the plasmon and exciton modes. J aggregates can strongly couple with the surface plasmon polariton [14][15][16] or the localized surface plasmon resonance (LSPR) [17,18] leading to new hybridized plasmon-exciton states (plexcitons). The dispersion curves of two plexcitonic modes show an avoided crossing, which is known as Rabi splitting [5]. Fofang et al. [19,20] further reported the enhanced and tunable nonlinear optical properties in the Au nanoshell-J aggregate complexes. As a quantum emitter (QE) locates at the center of a dimer nanoantenna, a Rabi splitting has been found in the scattering spectrum [21]. It was also found that the interaction between the quantum emitter and the gap plasmon can result in a Fano resonance in the metallic dimer-QE system [22]. In addition, Marinica et al. [23] found that the electron transfer of the excited electron into the metal can decrease the lifetime of the exciton in the QE.Recently, Manassah [24] investigated the electrodynamics of CuCl-coated Ag nanoshells. Semiconductor CuCl exhibits a strong Z 3 exciton line at about 3.202 eV [7,25]. The plasmon-exciton couplings in the Ag-CuCl nanoshell lead to a splitting of the excitonic line and a shift in LSPR. In the dimer including a CuCl nanosphere and an Ag nanosphere, the exciton resonances of the CuCl nanosphere interact with the SP resonances of the Ag nanoparticles resulting in the induced transparency and slow light effect [8]. We also found that the plasmon-exciton couplings in the Ag nanoshell with a semiconductor CuCl core can lead to the Rabi splitting and the induced transparency by changing the geometry of the CuCl-Ag nanoshell [26]. To Abstract The plasmon-exciton couplings in Ag-CuClcoated nanowires (ACNWs) have been investigated by using the scattering theory and the finite element method. It is found with increasing the shell thickness that the dipole plasmon resonance of the Ag nanowire can be tuned through the exciton resonance in the CuCl shell. The strong coupling between the plasmon resonance in the Ag nanowire and the exciton resonance in the CuCl shell leads to two new hybridized plexcitonic modes. The dispersion curves of the plexcitonic modes in the ACNWs are studied, and the obtained splitting energy is about 88 meV. We further find that the destructive interference between the plasmon and exciton resonances results in the plasmon-exciton induced transparency. As the TE wave propagates through the ACNW array, an extraordinary transmittance can be found in the ACNW array at the scattering dip of the ACNW.

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Subradiant Plasmon Modes in Multilayer Metal–Dielectric Nanoshells

Cited by 47 publications

References 32 publications

Subradiant, Superradiant Plasmon Modes and Fano Resonance in a Multilayer Nanocylinder Array Standing on a Thin Metal Film

Subradiant, Superradiant Plasmon Modes and Fano Resonance in a Multilayer Nanocylinder Array Standing on a Thin Metal Film

Dual Symmetry Breaking in Gold-Silica-Gold Multilayer Nanoshells

Plasmon–exciton induced transparency in plexcitonic Ag–CuCl-coated nanowires and associated arrays

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