Coherent Excitation Transport in Metal−Nanoparticle Chains

Citrin, D. S.

doi:10.1021/nl049679l

Cited by 150 publications

(133 citation statements)

References 15 publications

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“…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.…”

Section: -11mentioning

confidence: 99%

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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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Section: -11mentioning

confidence: 99%

“…12,13,15,16 However, such an approximation is not accurate for particle size greater than 50 nm when absorption loss is not negligible.…”

Section: 14mentioning

confidence: 99%

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

2007

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“…Arrays of metallic nanoparticles (MNPs; often referred to as plasmonic arrays) are widely recognized as potential building blocks for nanoscale optical circuitry [1][2][3][4][5][6][7][8][9] (see also Ref. 10 for an overview).…”

Section: Introductionmentioning

confidence: 99%

Optical bistability and hysteresis of a hybrid metal-semiconductor nanodimer

Малышев¹,

2011

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Optical response of an artificial composite nanodimer comprising a semiconductor quantum dot and a metal nanosphere is analyzed theoretically. We show that internal degrees of freedom of the system can manifest bistability and optical hysteresis as functions of the incident field intensity. We argue that these effects can be observed for real-world systems, such as a CdSe quantum dot and an Au nanoparticle hybrid. These properties can be revealed by measuring the optical hysteresis of Rayleigh scattering. We also show that the total dipole moment of the system can be switched abruptly between its two stable states by small changes in the excitation intensity. The latter promises various applications in the field of all-optical processing at the nanoscale, the most basic of them being the volatile optical memory.

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“…Perforating metal films with arrays of holes or slits, or periodically arranging metal nano-particles [1][2][3][4][5] result in the surface plasmonic crystals or plasmonic waveguides, potential applications of which are expected in such diverse areas as subwavelength light localization, negative index materials and perfect lensing, bio-sensing, surface energy transfer and waveguiding [3][4][5][6][7][8]. Recently the concept of surface plasmons have been extended to include perfect metals [9][10][11][12][13], thereby encompassing any phenomena involving strong surface electric field in microwave and terahertz frequency range [14,15].…”

Section: Introductionmentioning

confidence: 99%

Shape resonance omni-directional terahertz filters with near-unity transmittance

Lee¹,

Seo²,

Park³

et al. 2006

Opt. Express

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Terahertz transmission filters have been manufactured by perforating metal films with various geometric shapes using femtosecond laser machining. Two dimensional arrays of square, circular, rectangular, cshaped, and epsilon-shaped holes all support over 99% transmission at specific frequencies determined by geometric shape, symmetry, polarization, and lattice constant. Our results show that plasmonic structures with different geometric shaped holes are extremely versatile, dependable, easy to control and easy to make terahertz filters. J. B. Pendry, "Negative refraction makes a perfect lens," Phys. Rev. Lett. 85, 3966 (2000). 7.J. T. Shen, R. B. Catrysse, and S. Fan, "Mechanism for designing metallic metamaterials with a high index of refraction," Phys. Rev. Lett. 94, 197401 (2005). 8.M. J. Lockyear, A. P. Hibbins, J. R. Sambles, and C. R. Lawrence, "Microwave transmission through a single subwavelength annular aperture in a metal plate," Phys. Rev. Lett. 94, 193902 (2005). 9.

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Coherent Excitation Transport in Metal−Nanoparticle Chains

Cited by 150 publications

References 15 publications

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

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

Optical bistability and hysteresis of a hybrid metal-semiconductor nanodimer

Shape resonance omni-directional terahertz filters with near-unity transmittance

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