Plasmon-polariton transport in metal-nanoparticle chains embedded in a gain medium

Citrin, D. S.

doi:10.1364/ol.31.000098

Cited by 113 publications

(111 citation statements)

References 17 publications

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“…Such use of gain media has been demonstrated experimentally [4,5]. It has also been suggested that the incorporation of media with realistic gain coefficients in plasmonic devices can lead to low-attenuation or even lossless propagation of surface plasmons in plasmonic waveguides [6][7][8], increase of the resolution of negative-refractive-index near-field lenses [9], and control of the group velocity of nanoscale plasmonic waveguides [10].…”

Section: Introductionmentioning

confidence: 98%

Gain-induced switching in metal-dielectric-metal plasmonic waveguides

Veronis

Brongersma

et al. 2008

SPIE Proceedings

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The authors show that the incorporation of gain media in only a selected device area can annul the effect of material loss, and enhance the performance of loss-limited plasmonic devices. In addition, they demonstrate that optical gain provides a mechanism for on/off switching in metal-dielectric-metal (MDM) plasmonic waveguides. The proposed gain-assisted plasmonic switch consists of a subwavelength MDM plasmonic waveguide side-coupled to a cavity filled with semiconductor material. In the absence of optical gain in the semiconductor material filling the cavity, an incident optical wave in the plasmonic waveguide remains essentially undisturbed by the presence of the cavity. Thus, there is almost complete transmission of the incident optical wave through the plasmonic waveguide. In contrast, in the presence of optical gain in the semiconductor material filling the cavity, the incident optical wave is completely reflected. They show that the principle of operation of such gain-assisted plasmonic devices can be explained using a temporal coupled-mode theory. They also show that the required gain coefficients are within the limits of currently available semiconductor-based optical gain media.

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Section: Introductionmentioning

confidence: 98%

Gain-induced switching in metal-dielectric-metal plasmonic waveguides

Veronis

Brongersma

et al. 2008

SPIE Proceedings

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“…Broader analyses of 2D periodic arrays of both nanospheres and isotropic nanoscatterers have been carried out in [11,[25][26][27][28]. Likewise, mode propagation in 1D periodic arrays of nanospheres has been analyzed in [21,[29][30][31][32][33][34][35], and broader analyses of 1D periodic arrays of isotropic nanoscatterers and radiators in [36][37][38][39][40]. A review of the state of the art of linear and planar arrays of plasmonic nanospheres has recently been presented in [41].…”

Section: Introductionmentioning

confidence: 99%

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

et al. 2011

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Two-dimensional periodic arrays of noble metal nanospheres support a variety of optical phenomena, including bound and leaky modes of several types. The scope of this paper is the characterization of the modal dispersion diagrams of planar arrays of silver nanospheres, with the ability to follow individual modal evolutions. The metal spherical nanoparticles are described using the single dipole approximation technique by including all the retarded dynamic field terms. Polarizability of the nanospheres is provided by the Mie theory. Dispersion diagrams for both physical and nonphysical modes are shown for a square lattice of Ag nanospheres for the case of lossless and lossy metal particles, with dipole moments polarized along the x, y, and z directions. Though an array with one set of parameters has been studied, the analysis method and classification are general. The evolution of modes through different Riemann sheets and analysis of guidance and radiation are studied in detail.

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“…3 , 4 However, energy loss due to radiation and absorption in MNPs can be serious, and thus the design of low loss MNP waveguides become a priority concern. [5][6][7][8][9][10][11] To investigate the waveguide modes of periodic MNP chains, some authors calculated the dispersion relations. 2,[12][13][14][15][16][17] In the presence of dissipation, the guided modes have a finite life-time, and cannot be described completely by a simple dispersion relation between the real ω and real k .…”

mentioning

confidence: 99%

Plasmonic modes in periodic metal nanoparticle chains: a direct dynamic eigenmode analysis

2007

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We demonstrate an efficient eigen-decomposition method for analyzing the guided modes in metal nanoparticle chains. The proposed method has the advantage of showing the dispersion relation and mode quality simultaneously. It can also separate the material and geometrical properties, so its efficiency does not depend on the complexity of the material polarizability.The method is applied to analyze the guided modes of a single and a pair of metal chains. The more accurate dynamic dipole polarizability typically gives a red-shift compared with the results obtained with the broadly used quasistatic dipole polarizability with radiation correction.There are recent interests of using metal nanoparticle (MNP) chains to function as a designable subwavelength waveguide to transport optical signals. 1,2Wave propagation along MNP chains is mediated by coupled plasmonic resonances. Such plasmonic waveguides may serve as the building blocks for making nanoscale optical devices. 3 , 4 However, energy loss due to radiation and absorption in MNPs can be serious, and thus the design of low loss MNP waveguides become a priority concern. 5-11To investigate the waveguide modes of periodic MNP chains, some authors calculated the dispersion relations. 2,[12][13][14][15][16][17] In the presence of dissipation, the guided modes have a finite life-time, and cannot be described completely by a simple dispersion relation between the real ω and real k . It is customary to allow either one of ω and k to be a complex number. Operationally, this requires root searching of a complex function in the complex number plane. Such kind of root searching is time consuming, especially when full dynamic effect is considered. Some authors, therefore, only calculate the dispersion relation within quasistatic approximation. 2,14To include the retardation effect associated with radiation, other authors use the quasistatic dipole approximation (DA) with radiation correction. 12,13,15,16 However, such an approximation is not accurate for particle size greater than 50 nm when absorption loss is not negligible. 18Here, we demonstrate an eigen decomposition (ED) method 19,20 with a more accurate dynamic DA 21,22 to account for material properties. Such method does not require a root searching in the complex plane. The method consider both ω and k on the real line and, at the same time, shows effectively the qualities of the guided modes.We begin by considering an infinite periodic chain of MNPs along the z -direction, with particle diameter d = 50 nm and center-to-center distance of adjacent particles a = 75 nm.

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Plasmon-polariton transport in metal-nanoparticle chains embedded in a gain medium

Cited by 113 publications

References 17 publications

Gain-induced switching in metal-dielectric-metal plasmonic waveguides

Gain-induced switching in metal-dielectric-metal plasmonic waveguides

Characterization of complex plasmonic modes in two-dimensional periodic arrays of metal nanospheres

Plasmonic modes in periodic metal nanoparticle chains: a direct dynamic eigenmode analysis

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