Plasmon-enhanced two-photon excitation fluorescence of rhodamine 6G and an Eu-diketonate complex by a picosecond diode laser

Rabor, Janice B.; Kawamura, Kazutaka; Kurawaki, Junichi; Niidome, Yasuro

doi:10.1039/c9an00247b

Cited by 6 publications

(7 citation statements)

References 29 publications

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“…Since then, examples of the application of Eu III [15,[159][160][161][162], Tb III [33], Dy III [33], Yb III [32,163], and Sm III [15,163] complexes in 2P-luminescence imaging have been demonstrated. High 2P brightness (B (2) ), one of the critical factors for obtaining good quality luminescence imaging, is achieved by the presence of charge transfer states (CT) [40,164,165], high complex rigidity [166], or use of plasmonic bands [167]. For example, 2P-sensitized emission, using λ exc = 975 nm, of the [Eu(dbm) 3 (phen-NH 2 )] complex deposited onto a glass substrate is only observed when a layer of triangular silver nano prisms is present [167].…”

Section: Two-photon Excitation Ln III Complexes In Bioimagingmentioning

confidence: 99%

Recent Advances in Luminescence Imaging of Biological Systems Using Lanthanide(III) Luminescent Complexes

Monteiro

2020

Molecules

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The use of luminescence in biological systems allows one to diagnose diseases and understand cellular processes. Molecular systems, particularly lanthanide(III) complexes, have emerged as an attractive system for application in cellular luminescence imaging due to their long emission lifetimes, high brightness, possibility of controlling the spectroscopic properties at the molecular level, and tailoring of the ligand structure that adds sensing and therapeutic capabilities. This review aims to provide a background in luminescence imaging and lanthanide spectroscopy and discuss selected examples from the recent literature on lanthanide(III) luminescent complexes in cellular luminescence imaging, published in the period 2016–2020. Finally, the challenges and future directions that are pointing for the development of compounds that are capable of executing multiple functions and the use of light in regions where tissues and cells have low absorption will be discussed.

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Section: Two-photon Excitation Ln III Complexes In Bioimagingmentioning

confidence: 99%

Recent Advances in Luminescence Imaging of Biological Systems Using Lanthanide(III) Luminescent Complexes

Monteiro

2020

Molecules

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“…19−23 Recent progress in nano-optics has made it possible to enhance the two-photon-excitation process through near-field confinement of the excitation field by plasmonic nanostructures. 24,25 The local electromagnetic field around the plasmonic structures can be enhanced 26 by one or more orders of magnitude, depending on their shapes, sizes, and the materials. 27−29 Among all kinds of plasmonic structures, wet chemically synthesized gold nanorods have been widely exploited in the context of field-enhanced spectroscopy, mainly due to their high single-crystalline quality, 30,31 facile synthesis compared to other fabrication techniques, 32,33 and narrow tunable plasmon resonances.…”

Section: Introductionmentioning

confidence: 99%

Two-Photon-Excited Single-Molecule Fluorescence Enhanced by Gold Nanorod Dimers

Punj

Orrit

2022

Nano Lett.

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We demonstrate two-photon-excited single-molecule fluorescence enhancement by single end-to-end self-assembled gold nanorod dimers. We employed biotinylated streptavidin as the molecular linker, which connected two gold nanorods in endto-end fashion. The typical size of streptavidin of around 5 nm separates the gold nanorods with gaps suitable for the access of fresh dyes in aqueous solution, yet small enough to give very high two-photon fluorescence enhancement. Simulations show that enhancements of more than 7 orders of magnitude can be achieved for two-photon-excited fluorescence in the plasmonic hot spots. With such high enhancements, we successfully detect two-photonexcited fluorescence for a common organic dye (ATTO 610) at the single-molecule, single-nanoparticle level.

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“…The plasmon-assisted TPA is used to improve efficiency of silicon photodetectors for optical correlators in the near-infrared [9] as well as to enhance the TPA in photoluminescent semiconductor nanocrystals [10] and fluorophores [11].…”

Section: Introductionmentioning

confidence: 99%

Plasmon-assisted two-photon absorption in a semiconductor quantum dot -- metallic nanoshell composite

Nugroho,

Iskandar,

Malyshev

et al. 2020

Preprint

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Tho-photon absorption holds potential for many practical applications. We theoretically investigate the onset of this phenomenon in a semiconductor quantum dot -metallic nanoshell conjugate subjected to a resonant CW excitation. Two-photon absorption in this system may occur in two ways: incoherent -due to a consecutive ground-to-one-exciton-to-biexciton transition and coherent -due to a coherent two-photon process, involving the direct ground-to-biexciton transition in the quantum dot. The presence of a nanoshell nearby a quantum dot gives rise to two principal effects: (i) -renormalization of the applied field amplitude and (ii) -renormalization of the resonance frequencies and radiative relaxation rates of the quantum dot, both depending on the the quantum dot level populations. We show that in the perturbative regime, when the excitonic levels are only slightly populated, each of these factors may give rise to either suppression or enhancement of the two-photon absorption. The complicated interplay of the two determines the final effect. Beyond the perturbative regime, it is found that the two-photon absorbtion experiences a drastic enhancement, which occurs independently of the type of excitation, either into the one-exciton resonance or into the two-photon resonance. Other features of the two-photon absorption of the conjugate, that emerge due to the nanoparticles coupling, are bistability and self-oscillations, having no analog in the two-photon absorption of an isolated quantum dot.

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Plasmon-enhanced two-photon excitation fluorescence of rhodamine 6G and an Eu-diketonate complex by a picosecond diode laser

Abstract: A low-power picosecond diode laser was used for two-photon excitation fluorescence enhancement by plasmonic materials.

Cited by 6 publications

References 29 publications

Recent Advances in Luminescence Imaging of Biological Systems Using Lanthanide(III) Luminescent Complexes

Recent Advances in Luminescence Imaging of Biological Systems Using Lanthanide(III) Luminescent Complexes

Two-Photon-Excited Single-Molecule Fluorescence Enhanced by Gold Nanorod Dimers

Plasmon-assisted two-photon absorption in a semiconductor quantum dot -- metallic nanoshell composite

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