Plasmonic Effect of Gold Nanospheroid on Spontaneous Emission

Liaw, Jiunn-Woei; Chen, Chi-San; Chen, Jeng-Hong

doi:10.2528/pierb11041405

Cited by 9 publications

(10 citation statements)

References 28 publications

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“…The excitation rate is found by considering the local electric field at the position and wavelength of excitation, E(x d , λ ex ) and the emitters orientation, e p . If we consider the electric field in the presence of the metal nanoparticle near the fluorophore molecule, then the excitation rate enhancement is [36]:…”

Section: Of 13mentioning

confidence: 99%

See 1 more Smart Citation

Infra-Red Plasmonic Sensors

Centeno

Aid²,

Xie

2018

Chemosensors

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Plasmonic sensors exploiting the localized surface plasmon resonance (LSPR) of noble metal nanoparticles are common in the visual spectrum. However, bio-sensors near the infra-red (NIR) windows (600-900 nm and 1000-1400 nm) are of interest, as in these regions the absorption coefficients of water, melanin deoxyglobin, and hemoglobin are all low. The first part of this paper reviews the work that has been undertaken using gold (Au) and silver (Ag) particles in metal enhanced fluorescence (MEF) in the NIR. Despite this success, there are limitations, as there is only a narrow band in the visual and NIR where losses are low for traditional plasmonic materials. Further, noble metals are not compatible with standard silicon manufacturing processes, making it challenging to produce on-chip integrated plasmonic sensors with Au or Ag. Therefore, it is desirable to use different materials for plasmonic chemical and biological sensing, that are foundry-compatible with silicon (Si) and germanium (Ge). One material that has received significant attention is highly-doped Ge, which starts to exhibit metallic properties at a wavelength as short as 6 µm. This is discussed in the second part of the paper and the results of recent analysis are included.Fluorescent molecules emitting at wavelengths in the infra-red window, in which penetration depth is high and the autofluorescence minimum is of particular interest, are potentially an attractive technology for bio-applications [27]. However, the low quantum yield and poor photostability of near infra-red (NIR) dyes currently limits their applicability. Design and synthesis of NIR dyes with high quantum yield and photostability have proved to be extremely challenging, due to the complex synthetic routes required for these large, complex molecules [27]. The amplification of light from NIR fluorophores by MEF is a promising strategy for dramatically improving both the detection sensitivity and image enhancement, thereby realizing the potential advantages of the NIR fluorophores. Section 2 of this paper discusses the physical process of MEF and reviews some of the published work by the authors.NIR losses arise in Au and Ag from intraband (or Drude) losses. There is, therefore, only a narrow band in the visual and NIR range where losses are low for traditional plasmonic materials. A further challenge associated with noble metals is that they are not compatible with standard silicon manufacturing processes. Further, noble metals diffuse into the semiconductor, forming deep-level traps which have an adverse effect on device performance. While Au and Ag are the obvious choice for visible and NIR applications, there is a desire and need for chemical and biological sensing in the mid-infrared (MIR) range [29][30][31] using materials that are foundry-compatible with silicon (Si) and germanium (Ge), that might lead to on-chip integration of devices governed by plasmonic effects [25,26]. One material that has received significant attention as a potential plasmonic material in the MIR is highly-...

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Section: Of 13mentioning

confidence: 99%

“…From Equations (1)-(6) it is possible to calculate the emission enhancement from a fluorophore in close proximity to metal particle, using computational electromagnetics [1,35,36]. Figure 1 shows the calculated electric field enhancement around cylindrical nanoparticles for an incident plane wave of wavelength 650 nm.…”

Section: Of 13mentioning

confidence: 99%

Infra-Red Plasmonic Sensors

Centeno

Aid²,

Xie

2018

Chemosensors

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“…From Equations (1)-(6) it is possible to calculate the emission enhancement from a fluorophore in close proximity to metal particle using computational electromagnetics [1,28,29]. including nanorods, nanoshells and porous Au films by dealloying [20].…”

Section: Metal Enhanced Fluorescence In the Near Infra-redmentioning

confidence: 99%

“…the metal nano-cylinder is added to the model and enclosed by the surface.The excitation rate is found by considering the local electric field at the position and wavelength of excitation, E(xd, λex) and the emitters orientation ep . If we consider the electric field in the presence of the metal nanoparticle near the fluorophore molecule, then the excitation rate enhancement is[29]:…”

mentioning

confidence: 99%

Infra-Red Plasmonic Sensors

Centeno¹,

Aid²,

Xie³

2017

Preprint

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Plasmonic sensors exploiting the Localized Surface Plasmon Resonance (LSPR) of noble 12 metal nanoparticles are common in the visual spectrum. However, for bio-sensors the near infra-13 red (NIR) windows (600 nm -900 nm and 1000 nm -1400 nm) are of interest, as it is a region where 14 the absorption coefficient of water, melaninm deoxy-and hemoglobin are all low. The first part of 15 this paper reviews the work that has been undertaken on using gold (Au) and silver (Ag) particles 21compatible with silicon (Si) and germanium (Ge). One material that has received significant 22 attention is highly doped Ge which starts to exhibit metallic properties at a wavelength as short as 23 6 μm. This is discussed in the second part of the paper and the results of recent analysis are included. 24

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“…The field of plasmonics which explores the interaction of light with metals has gained tremendous interest over the past few years [1,2]. Several numerical techniques have been proposed to study the interaction/propagation of electromagnetic waves with metals [3], and one of the most popular and widely accepted techniques is the finitedifference time-domain (FDTD) method [4].…”

Section: Introductionmentioning

confidence: 99%

PLRC and Ade Implementations of Drude-Critical Point Dispersive Model for the FDTD Method

Chun¹,

Kim²,

Kim³

et al. 2013

PIER

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Abstract-We describe the implementations of Drude-critical point model for describing dispersive media into finite difference time domain algorithm using piecewise-linear recursive-convolution and auxiliary differential equation methods. The advantages, accuracy and stability of both implementations are analyzed in detail. Both implementations were applied in studying the transmittance and reflectance of thin metal films, and excellent agreement is observed between analytical and numerical results.

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Plasmonic Effect of Gold Nanospheroid on Spontaneous Emission

Cited by 9 publications

References 28 publications

Infra-Red Plasmonic Sensors

Infra-Red Plasmonic Sensors

Infra-Red Plasmonic Sensors

PLRC and Ade Implementations of Drude-Critical Point Dispersive Model for the FDTD Method

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