Spectral shifts of stimulated Rayleigh–Mie scattering in Ag nanoparticle colloids

Ерохин, А. И.; Smetanin, I. V.; Михайлов, С И; Булычев, Н. А.

doi:10.1364/ol.43.001570

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…On the other hand, different UV−vis and fluorescence responses were found after the addition of water to DPP1•F in anhydrous acetone. The whole spectrum blue-shifted from 569 to 527 nm and from 433 to 420 nm without peak shape change, but had a leveled-off tail in the visible region due to the Mie effect of the nanoparticles 51,52 DLS confirmed aggregates of DPP1•F in the presence of water. DPP1•F in anhydrous acetone was homogeneous, but DPP1•F formed approximately 30 nm size aggregates after addition of 2.5% water (Figure S13).…”

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confidence: 95%

Excited State Intramolecular Proton Transfer Plus Aggregation-Induced Emission-Based Diketopyrrolopyrrole Luminogen: Photophysical Properties and Simultaneously Discriminative Detection of Trace Water in Three Organic Solvents

Wang

Tang

et al. 2019

Anal. Chem.

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Developing solid state near-IR (NIR) emitters and simultaneously discriminative detection of trace water in organic solvents has long been a significant challenge. In this work, a novel diketopyrrolopyrrole-based luminogen (DPP1) with excited state intramolecular proton transfer (ESIPT) and aggregation-induced emission (AIE) characteristics has been designed and synthesized. Its amorphous and crystal solids show red and NIR-emissive fluorescence at 625 and 675 nm, respectively. When DPP1 reacts with fluoride anion, the resulting system (DPP1·F) can discriminatively detect the water content in aprotic solvents with colorimetric and fluorescent dual modes. Distinct fluorescent responses of “turn-on”, “ratiometric turn-off”, and “ratiometric turn-on” and low limits of detection of 0.0064, 0.042, and 0. The water-induced sensitive and fast change in THF was applied to the determination of water in foodstuffs in practical solid state indicator paper strips.

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confidence: 95%

Excited State Intramolecular Proton Transfer Plus Aggregation-Induced Emission-Based Diketopyrrolopyrrole Luminogen: Photophysical Properties and Simultaneously Discriminative Detection of Trace Water in Three Organic Solvents

Wang

Tang

et al. 2019

Anal. Chem.

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“…In our previous reports [ 13 , 14 ], we have reconsidered the experimental results on measured zero spectral shift of 2PA SRMS in nanocolloids which has been reported in [ 5 , 12 ]. Our measurements have been undertaken in Ag nanoparticle colloidal solutions in toluene and hexane and reveal the appearance of non-zero anti-Stokes spectral shifts in backscattered signal for both these colloids.…”

Section: Introductionmentioning

confidence: 99%

Stimulated Thermal Scattering in Two-Photon Absorbing Nanocolloids under Laser Radiation of Nanosecond-to-Picosecond Pulse Widths

et al. 2022

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Recent discoveries in nonlinear optical properties of nanoparticle colloids make actual the challenge to lower the energy threshold of phase conjugation and move it into the domain of shorter pulse widths. A novel effect of the stimulated Rayleigh-Mie scattering (SRMS) in two-photon absorbing nanocolloids is considered as a promising answer to this challenge. We report the results of experimental and theoretical study of the two-photon-assisted SRMS in Ag and ZnO nanocolloids in the nanosecond-to-picosecond pulse width domain. For 12 ns 0.527 μm laser pulses, the four-wave mixing SRMS scheme provides lasing and amplification of backscattered anti-Stokes signal in Ag nanocolloids in toluene at the threshold 0.2 mJ and the spectral shifts up to 150 MHz. For 100 ps 0.532 μm pulses, we observed for the first time efficient (over 50% in signal-to-pump ratio of pulse energies) SRMS backscattering of the anti-Stokes signal in Ag nanocolloids in toluene and predominantly Stokes signal in ZnO nanocolloids in water, with the spectral shifts up to 0.25 cm−1. We develop the first order-in-perturbation model of the four-wave mixing two-photon absorption-assisted SRMS process which shows that at nanosecond pulses, amplification is predominantly due to the thermal-induced coherent oscillations of polarization while the slow temperature wave acts also as a dynamic spatial grating which provides a self-induced optical cavity inside the interaction region. At a picosecond pulse width, according to our model, the spectral overlap between pump and signal pulses results in formation of only the dynamic spatial temperature grating, and we succeeded at recovering the linear growth of the spectral shift with the pump power near the threshold.

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“…Up today, the SMS effect has also been investigated in a number of other Mie scattering media, including nanoparticles of Au, Ag, and Au/Ag alloy suspended in toluene, − nanospheres of ZnO in water, nanocrystals of CuS in toluene, and organic nanospheres in water. , …”

Section: Introductionmentioning

confidence: 99%

Two-Photon Excitation Enhanced High-Efficiency and Phase-Conjugate Stimulated Mie Scattering of Perovskite Nanocrystals Suspended in n-Hexane

Chen

Liu

et al. 2020

J. Phys. Chem. C

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Two-photon excitation enhanced backward stimulated Mie scattering (SMS) is generated in a system of perovskite (CsPbBr x I 3-x ) nanocrystals (NCs) of ∼11 nm size suspended in nhexane, when pumped with ∼816 nm and ∼10 ns laser pulses. The major linear absorbance band of these PCs is in the 550−300 nm spectral range; thereby, at the pump wavelength (∼800 nm), a considerable two-photon excitation enhanced spatial redistribution of the PCs leads to the formation of an effective Bragg grating that ensures a lower pump threshold requirement and a higher energy transfer efficiency (η) from the pump pulse to the SMS output pulse. Under optimized experimental conditions, the measured efficiency in this system reaches a high value of η = 40%. In addition, the output backward SMS beam exhibits a superior optical phase-conjugation property, and the temporal behavior of SMS output has also verified the proposed theoretical model.

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Spectral shifts of stimulated Rayleigh–Mie scattering in Ag nanoparticle colloids

Cited by 10 publications

References 11 publications

Excited State Intramolecular Proton Transfer Plus Aggregation-Induced Emission-Based Diketopyrrolopyrrole Luminogen: Photophysical Properties and Simultaneously Discriminative Detection of Trace Water in Three Organic Solvents

Excited State Intramolecular Proton Transfer Plus Aggregation-Induced Emission-Based Diketopyrrolopyrrole Luminogen: Photophysical Properties and Simultaneously Discriminative Detection of Trace Water in Three Organic Solvents

Stimulated Thermal Scattering in Two-Photon Absorbing Nanocolloids under Laser Radiation of Nanosecond-to-Picosecond Pulse Widths

Two-Photon Excitation Enhanced High-Efficiency and Phase-Conjugate Stimulated Mie Scattering of Perovskite Nanocrystals Suspended in n-Hexane

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