Optical Transmission Properties and Electric Field Distribution of Interacting 2D Silver Nanorod Arrays

Evans, Paul; Kullock, René; Hendren, William; Atkinson, R.; Pollard, Robert; Eng, Lukas M.

doi:10.1002/adfm.200701289

Cited by 74 publications

(81 citation statements)

References 35 publications

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“…The absorption bands near 400 and 700 nm are caused by TSPRs and LSPRs of the Ag nanowire array, respectively. 26,27 As the average Ag www.acsnano.org length increases from ϳ380 to ϳ650 nm (the electrodeposition charge Q increases from 200 to 360 mC), the strength of the LSPRs increases about 60%, but the peak position of the LSPRs slightly blue shifts from 727 to 708 nm. This blue shift of LSPRs is mainly caused by the resonances of higher order plasmon modes in the strongly coupled array of Ag nanowires.…”

Section: Resultsmentioning

confidence: 99%

Plasmon-Mediated Radiative Energy Transfer across a Silver Nanowire Array via Resonant Transmission and Subwavelength Imaging

Zhou

Yang

et al. 2010

ACS Nano

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D irectional control over the excitation energy transfer between different nanosystems is of critical importance for the emerging field of nanophotonics and has various prospective applications ranging from biological detections to quantum information processing. 1Ϫ14 For instance, the excitation energy transfer between semiconductor quantum dots (QDs) is employed to demonstrate quantum operations, 4 and the stimulated interactions between active optical dipoles and surface plasmons are used to generate plasmonic lasing. 5Ϫ8 Comparing with nonradiative energy transfer (such as Dexter and Fö rster processes), 15,16 radiative energy transfer has sufficient distance range but poor efficiency and directionality. The surface plasmons of the exquisitely designing and optimizing metal nanostructures are powerful tools to enhance the efficiency of both radiative and nonradiative energy transfers. 1,17Ϫ19 The Ag films have been used by Andrew et al. to first demonstrate plasmon-mediated radiative energy transfer from donor to acceptor dye molecules over distances longer than 100 nm, 1 which proceeds in three processes, converting optical dipole of the donors to the surface plasmon on one interface of a Ag film, then cross coupling of two surface plasmons on the opposite interfaces of the film, and finally transferring excitation energy to the acceptors on the opposite side. On the basis of this principle, the corrugated nanostructures have been used by Feng et al. to enhance the cross coupling of the two surface plasmons on the opposite interfaces. 17 A two-dimensional (2D) standing metal nanowire array could be a good candidate to assist radiative energy transfer due to its near-field coupling and imaging behaviors. 20,21 The excitation energy of nanoemitters can be efficiently converted to the surface plasmons through strong coupling near the tips of the Ag nanowires, 10 and the corresponding Purcell factor, P (the ratio of the spontaneous emission rate into the plasmon modes over emission into other channels), is predicted to be as high as 10 3 . 22,23 Metal nanorods support both longitudinal and transverse surface plasmon resonances (abbreviated by LSPRs and TSPRs, respectively) by the free electrons near the metal surface oscillating perpendicularly to and along the long axis of the nanorods. Resonant transmission through a Au nanorod array with a far-field excitation is reported by Lyvers et al.,24 which is found to be caused by the half-

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Section: Resultsmentioning

confidence: 99%

Plasmon-Mediated Radiative Energy Transfer across a Silver Nanowire Array via Resonant Transmission and Subwavelength Imaging

Zhou

Yang

et al. 2010

ACS Nano

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“…Modern nanofabrication methodologies enable the creation of a number of different nanostructures with precisely controlled shapes, sizes, and spacing [3][4][5][6][7][8][9][10]. This has extended to the creation of a range of different metallic nanostructures array designs that produce localized surface plasmon resonances (LSPRs) [8][9][10][11][12][13][14][15]. One such design is based on arrays of quasi self-standing metal nanorods [13][14][15].…”

Section: Papermentioning

confidence: 99%

“…This has extended to the creation of a range of different metallic nanostructures array designs that produce localized surface plasmon resonances (LSPRs) [8][9][10][11][12][13][14][15]. One such design is based on arrays of quasi self-standing metal nanorods [13][14][15]. Whereby metal nanorods are prepared in a host matrix which when removed produces an array of self-standing nanorods.…”

Section: Papermentioning

confidence: 99%

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Plasmon enhanced fluorescence studies from aligned gold nanorod arrays modified with SiO2 spacer layers

Damm

Fedele

Murphy

et al. 2015

Applied Physics Letters

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Here, we demonstrate that quasi self-standing Au nanorod arrays prepared with plasma polymerisation deposited SiO2 dielectric spacers support surface enhanced fluorescence (SEF) while maintaining high signal reproducibility. We show that it is possible to find a balance between enhanced radiative and non-radiative decay rates at which the fluorescent intensity is maximized. The SEF signal optimised with a 30 nm spacer layer thickness showed a 3.5-fold enhancement with a signal variance of <15% thereby keeping the integrity of the nanorod array. We also demonstrate the decreased importance of obtaining resonance conditions when localized surface plasmon resonance is positioned within the spectral region of Au interband transitions. Procedures for further increasing the SEF enhancement factor are also discussed.

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“…3(a), at normal (0 ) incidence, the electric fields of P-polarized and S-polarized component included in the incident light are along the two short axes (X-axis and Y-axis) of the nanowires; thus, only the transverse resonances are excited by the short axes of the gold nanowires, [27][28][29] while the electric field along the long axis (Z-axis) of the nanowires is not excited. 30 This is the key difference to the nanowires or nanorods in solution or dispersed horizontally on a substrate. In our case, there are two possible reasons for extinction peak red shifting with increasing the diameter of nanowires.…”

Section: Resultsmentioning

confidence: 99%

Optical and electrical properties of gold nanowires synthesized by electrochemical deposition

Yao

Duan

et al. 2011

Journal of Applied Physics

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Gold nanowire arrays with different sizes were fabricated by electrochemical deposition in etched ion-track templates. The diameter of the gold nanowires between 30 and 130 nm could be well adjusted by pore sizes in the templates through etching time. Single-crystalline nanowires were achieved by changing the parameters of electrochemical deposition. The morphology and crystal structure of the fabricated gold nanowires were characterized by means of scanning electron microscopy and transmission electron microscopy. The optical properties of the gold nanowire arrays embodied in templates were systematically measured by absorption spectra with a UV/Vis/ NIR spectrophotometer. Due to the surface plasmon resonance effect, the extinction peaks of gold nanowire arrays possessed a red-shift with increasing wires diameter and a blue-shift with decreasing angle between incident light and nanowire arrays. The failure current density of the single gold nanowire as a function of diameter was determined and the failure mechanism was also discussed.

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Optical Transmission Properties and Electric Field Distribution of Interacting 2D Silver Nanorod Arrays

Cited by 74 publications

References 35 publications

Plasmon-Mediated Radiative Energy Transfer across a Silver Nanowire Array via Resonant Transmission and Subwavelength Imaging

Plasmon-Mediated Radiative Energy Transfer across a Silver Nanowire Array via Resonant Transmission and Subwavelength Imaging

Plasmon enhanced fluorescence studies from aligned gold nanorod arrays modified with SiO2 spacer layers

Optical and electrical properties of gold nanowires synthesized by electrochemical deposition

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