Parametric optimization of visible wavelength gold lattice geometries for improved plasmon-enhanced fluorescence spectroscopy

Norville, Casey; Smith, Kyle Z.; Dawson, Jeremy

doi:10.1364/ao.384653

Cited by 3 publications

(3 citation statements)

References 177 publications

(517 reference statements)

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“…The interest in and the importance of fluorescence measurements in sensing technology, particularly for bio-diagnostic-related problems, has been emphasized in a large part of the literature [ 1 , 2 , 3 , 4 , 5 , 6 ], whereby a wide variety of ways to enhance the fluorescence signal have been explored. Over the past years, the technological evolution of nanostructured materials and the possibilities of producing metasurfaces with peculiar optical properties allowed the exploitation of photonic and plasmonic systems to amplify and improve the fluorescence efficiency [ 7 , 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Modes and Fluorescence Enhancement Coupling Mechanism: A Case with a Nanostructured Grating

et al. 2022

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The recent development and technological improvement in dealing with plasmonic metasurfaces has triggered a series of interesting applications related to sensing challenges. Fluorescence has been one of the most studied tools within such a context. With this in mind, we used some well characterized structures supporting plasmonic resonances to study their influence on the emission efficiency of a fluorophore. An extended optical analysis and a complementary investigation through finite-difference time-domain (FDTD) simulations have been combined to understand the coupling mechanism between the excitation of plasmonic modes and the fluorescence absorption and emission processes. The results provide evidence of the spectral shape dependence of fluorescence on the plasmonic field distribution together with a further relationship connected with the enhancement of its signal. It has made evident that the spectral region characterized by the largest relative enhancement closely corresponds to the strongest signatures of the plasmonic modes, as described by both the optical measurements and the FDTD findings.

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Section: Introductionmentioning

confidence: 99%

Plasmonic Modes and Fluorescence Enhancement Coupling Mechanism: A Case with a Nanostructured Grating

et al. 2022

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“…Metallic nanostructures have the ability to confine light within the subwavelength area, which is very important for light harvesting enhancement. The optical properties of metallic nanostructures have been employed in many applications like sensing, imaging, and laser [10]. In addition to the size and shape of metallic nanostructures, another important factor is the gap between metallic nanostructures that can play a vital role in optical response and eventually light confinement.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the size and shape of metallic nanostructures, another important factor is the gap between metallic nanostructures that can play a vital role in optical response and eventually light confinement. As a result, light confinement between metallic nanostructures in the subwavelength area has become very important for many light-related devices [10,11].…”

Section: Introductionmentioning

confidence: 99%

Light harvesting enhancement using metal nanoparticles

Yaseen¹

2021

EEJET

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Metal nanoparticles are very important for their optical properties when they interact with light. Metal nanoparticles have the ability to confine the collective oscillation of electrons, which is called localized surface plasmon resonance (LSPR). In this work, silver nanoparticles have been proposed to enhance light harvesting, which could be useful for different applications. Metal nanoparticles such as gold and silver nanoparticles have the ability to concentrate field in a very small space. In this study, gold and silver nanoparticles optical response was investigated using frequency domain simulation. The resonance wavelength of gold and silver nanoparticles was about 550 nm and 400 nm, respectively. Silver nanoparticles showed better LSPR performance than gold nanoparticles. Therefore, silver nanoparticles were chosen for optical field enhancement. Here silver nanoparticles were placed on a silicon substrate for optical field enhancement. To study the effect of size on the optical response of silver nanoparticles, the optical properties of this structure with different silver nanoparticles diameter values were investigated. Silver nanoparticles with 40 nm diameters showed a better optical response. To study the effect of the distance between silver nanoparticles on the optical response, different gap values were put between silver nanoparticles. The gap value of 4 nm showed a better optical response. The obtained results showed that the localized field is strongly dependent on the metal type, size, and space between nanoparticles. In addition, the optical field concentration can be controlled by tuning the size and space between silver nanoparticles. This will support localized field enhancement. The enhanced localized field will increase the field absorption near the surface, which can be beneficial for energy harvesting applications such as solar cells and detectors

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Plasmon-modulated photoluminescence enhancement in hybrid plasmonic nano-antennas

et al. 2020

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In this work, we performed a systematic study on a hybrid plasmonic system to elucidate a new insight into the mechanisms governing the fluorescent enhancement process. Our lithographically defined plasmonic nanodisks with various diameters act as receiver and transmitter nano-antennas to outcouple efficiently the photoluminescence of the coupled dye molecules. We show that the enhancement of the spontaneous emission rate arises from the superposition of three principal phenomena: (i) metal enhanced fluorescence, (ii) metal enhanced excitation and (iii) plasmon-modulated photoluminescence of the photoexcited nanostructures. Overall, the observed enhanced emission is attributed to the bi-directional near-field coupling of the fluorescent dye molecules to the localized plasmonic field of nano-antennas. We identify the role of exciton–plasmon coupling in the recombination rate of the sp-band electrons with d-band holes, resulting in the generation of particle plasmons. According to our comprehensive experimental analyses, the mismatch between the enhanced emission and the emission spectrum of the uncoupled dye molecules is attributed to the plasmon-modulated photoluminescence of the photoexcited hybrid plasmonic system.

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Parametric optimization of visible wavelength gold lattice geometries for improved plasmon-enhanced fluorescence spectroscopy

Abstract: The exploitation of spectro-plasmonics will allow for innovations in optical instrumentation development and the realization of more efficient optical biodetection components. Biosensors

Cited by 3 publications

References 177 publications

Plasmonic Modes and Fluorescence Enhancement Coupling Mechanism: A Case with a Nanostructured Grating

Plasmonic Modes and Fluorescence Enhancement Coupling Mechanism: A Case with a Nanostructured Grating

Light harvesting enhancement using metal nanoparticles

Plasmon-modulated photoluminescence enhancement in hybrid plasmonic nano-antennas

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