Enhanced green and red upconversion emissions in Er 3+ -doped boro-tellurite glass containing gold nanoparticles

Dousti, M. Reza; Amjad, Raja J.; Mahraz, Zahra Ashur Said

doi:10.1016/j.molstruc.2014.08.040

Cited by 36 publications

(10 citation statements)

References 26 publications

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“…Gold nanoparticles resulted in upconversion enhancement mostly between 2 and 30. [120][121][122][123] Silver nanoparticles produced enhancement ranging from 1.35 to 17. [124][125][126][127][128][129][130][131][132][133][134][135] The upconverted luminescence intensity generally increases with increasing metal nanoparticle concentration until it reaches a maximum and begins to decrease as quenching dominates over enhancement.…”

Section: Plasmon Enhancement Of Emissionmentioning

confidence: 99%

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Plasmon enhancement of luminescence upconversion

2015

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Frequency conversion has always been an important topic in optics. Nonlinear optics has traditionally focused on frequency conversion based on nonlinear susceptibility but with the recent development of upconversion nanomaterials, luminescence upconversion has begun to receive renewed attention. While upconversion nanomaterials open doors to a wide range of new opportunities, they remain too inefficient for most applications. Incorporating plasmonic nanostructures provides a promising pathway to highly efficient upconversion. Naturally, a plethora of theoretical and experimental studies have been published in recent years, reporting enhancements up to several hundred. It is however difficult to make meaningful comparisons since the plasmonic fields are highly sensitive to the local geometry and excitation condition. Also, many luminescence upconversion processes involve multiple steps via different physical mechanisms and the overall output is often determined by a delicate interplay among them. This review is aimed at offering a comprehensive framework for plasmon enhanced luminescence upconversion. We first present quantum electrodynamics descriptions for all the processes involved in luminescence upconversion, which include absorption, emission, energy transfer and nonradiative transitions. We then present a bird's eye view of published works on plasmon enhanced upconversion, followed by more detailed discussion on comparable classes of nanostructures, the effects of spacer layers and local heating, and the dynamics of the plasmon enhanced upconversion process. Plasmon enhanced upconversion is a challenging and exciting field from the fundamental scientific perspective and also from technological standpoints. It offers an excellent system to study how optical processes are affected by the local photonic environment. This type of research is particularly timely as the plasmonics is placing heavier emphasis on nonlinearity. At the same time, efficient upconversion could make a significant impact on many applications including solar energy conversion and biomedical imaging. The marriage of luminescent materials research with nanophotonics currently being initiated with plasmon enhanced upconversion research explores a new frontier in photonics that could potentially spawn many exciting new fields.

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Section: Plasmon Enhancement Of Emissionmentioning

confidence: 99%

“…136 Even in such cases, enhanced upconversion has been observed. 122,123 In these cases, however, it is difficult to attribute the enhanced upconversion to plasmon enhancement. Instead, enhanced light scattering by the small gold nanoparticles may be the origin of the observed enhancement.…”

Section: Plasmon Enhancement Of Emissionmentioning

confidence: 99%

Plasmon enhancement of luminescence upconversion

2015

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“…Glass incorporated with 0.1 mol% of Au NPs shows the optimum enhancement, ascribed to local field effect of Au NPs in the vicinity of Nd 3+ ions (Ghoshal et al, 2015). Even frequently mention as possible mechanism in assisting UC PL improvement, energy transfer process from Au Nd is less likely to occur due to short plasmon lifetime of Au NPs compare to Nd 3+ ion (Dousti et al, 2014). Emission band near expected plasmon band of Au NPs (565-597nm) may promote more inverse population responsible for PL action, thus green emission (545 nm) enhanced better than blue emission (420 nm) (Ghoshal et al, 2015).…”

Section: Temmentioning

confidence: 99%

Optical Properties of Neodymium Doped Magnesium Zinc Sulfo- Phopshate Glass: Impact of Gold Nanoparticles Inclusion

Yusof

Ghoshal

2018

JSML

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Gold (Au) nanoparticles (NPs) incorporated in magnesium zinc sulfo-phosphate glass with the molar composition of (58.5P2O5-20MgO-20ZnSO4-1.5Nd2O3-xAu NPs (where x = 0.0, 0.1, 0.2, 0.3, and 0.4 mol%) were prepared via melt quench technique. The effect of Au NPs as incorporated in Nd 3+ doped glasses were studied using X-ray diffraction (XRD), High Resolution-Transmission Electron Microscope (HR-TEM), UV-Visible-NIR absorption spectrometer and photoluminescence spectrometer. The amorphous nature of glass is confirmed via XRD measurements and existence of Au NPs inside the glass is reveal by HR-TEM. The typical absorption bands of Nd 3+ are attained which positioned around 352, 430, 459, 474, 512, 525, 581, 626, 682, 744, 801and 875 nm. Up-conversion (UC) photoluminescence (PL) demonstrated six prominent emission bands located around 420, 445, 460, 484, 515 and 545 nm corresponding transition 2 P1/2 4 I9/2, 2 D5/2 4 I11/2, 2 P1/2 4 I11/2, 2 D5/2 4 I13/2, 2 K15/2, 4 G7/2 4 I11/2, 4 I9/2 and 2 D5/2 4 I15/2 respectively. Glass containing 0.1 mol% of Au NPs shows utmost PL enhancement and the emission decrease beyond 0.1 mol% of Au NPs depicts re-absorption of SPR and increase of non-radiative channel. The improvement of PL intensity attributed to local field effect of Au NPs that altered the environment in proximity Nd 3+ ions. The proposed glass could be potential for improvement of solid state laser design.

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“…Thus, a much stronger 1.53 lm fluorescence emission can be expected. [30,31]. It is clearly seen that the co-doping of Ce 3+ ions greatly suppresses the up-conversion emission, which is attributed to the obvious decrease of Er 3+ population at 4 I 11/2 level due to the ET from Er 3+ : 4 I 11/2 to Ce 3+ : 2 F 7/2 levels as discussed above, since the Er 3+ ions joining the up-conversion emission decrease if the total population at 4 I 11/2 level decreases.…”

Section: Absorption Spectrummentioning

confidence: 99%