Random laser materials: from ultrahigh efficiency to very low threshold (Anderson localization)

Wetter, Niklaus Ursus; Jiménez‐Villar, Ernesto

doi:10.1007/s10854-019-01289-x

Cited by 6 publications

(4 citation statements)

References 51 publications

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“…The lasing threshold of GCCaF shows the highest value because of the small fluoride phase droplet as well as the small crystal size and low crystallinity. In contrast, GCSrF shows the best lasing performance with the lowest threshold value, which can be explained by the larger fluoride phase separation droplet, crystal size, and higher crystallinity 75 . Although GCBaF should have been the best random lasing candidate among these three samples theoretically, the interpenetrated fluoride phase and the co‐existence of two crystalline phases (BaF 2 and BaAlF 5 ) disrupt the light path during the optical feedback process, resulting in the higher threshold 76 .…”

Section: Resultsmentioning

confidence: 96%

“…In contrast, GCSrF shows the best lasing performance with the lowest threshold value, which can be explained by the larger fluoride phase separation droplet, crystal size, and higher crystallinity. 75 Although GCBaF should have been the best F I G U R E 5 Photoluminescence (PL) excitation and emission spectra of Er 3+ (A), Eu 3+ (B) and Eu 2+ (C). In (C), λ ex = 340 nm for GBaF, λ ex = 290 nm for GCBaF, and excitation spectra of G/GCBaF were monitored at 445 nm.…”

Section: Selective Enrichment Of Rare Earth Ions To Enhance Luminesmentioning

confidence: 99%

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Ca²⁺/Sr²⁺/Ba²⁺ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass

Zhao

Chen

et al. 2020

J Am Ceram Soc

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Fluoride phase separation is the initial stage of nanocrystallization in oxyfluoride glasses, and it is a key step in achieving transparent glass‐ceramics with good luminescence. In this work, we combine molecular dynamics (MD) simulations and experimental studies to investigate the phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass and glass‐ceramics containing alkali earth fluoride (MF2). The results reveal different phase separation behaviors due to the field strength difference of M2+. The composition and size similarity between the fluoride‐rich regions in the MD simulated glass and the fluoride nanocrystals in the experimental prepared glass‐ceramics are observed, suggesting that the separated fluoride phase is the structural origin of the observed MF2 nanocrystals. Besides, in order to understand the M2+ dependent glass structural features, the crystallization temperatures, the luminescent properties of Eu3+ and Eu2+ doped glass‐ceramics, and the lasing performance of Er3+ doped glass‐ceramics are discussed. Based on these comprehensions, some strategies are proposed to help to efficiently design oxyfluoride glass with desired luminescence performance.

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Section: Resultsmentioning

confidence: 96%

Section: Selective Enrichment Of Rare Earth Ions To Enhance Luminesmentioning

confidence: 99%

Ca²⁺/Sr²⁺/Ba²⁺ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass

Zhao

Chen

et al. 2020

J Am Ceram Soc

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“…They are so-called random lasers where an electromagnetic (EM) field propagates through a disordered medium possessing the gain [50]. Technically, for random lasers, we can exploit a number of disordered materials, which provide light diffusion and amplification; see, e.g., [51]. In Figure 2, we represent a sketch of a random laser operating in two physically well-distinguished limits.…”

Section: Random Lasersmentioning

confidence: 99%

Random Lasers as Social Processes Simulators

Alodjants,

Zacharenko,

Tsarev

et al. 2023

Entropy

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In this work, we suggest a quantum-like simulator concept to study social processes related to the solution of NP-hard problems. The simulator is based on the solaser model recently proposed by us in the framework of information cascade growth and echo chamber formation in social network communities. The simulator is connected with the random laser approach that we examine in the A and D-class (superradiant) laser limits. Novel network-enforced cooperativity parameters of decision-making agents, which may be measured as a result of the solaser simulation, are introduced and justified for social systems. The innovation diffusion in complex networks is discussed as one of the possible impacts of our proposal.

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“…Alternatively, it has also been possible to control the random laser through the socalled post-control, being carried out by controlling external parameters such as the temperature, shed electric field, and optics (Ye et al, 2017). As for the random laser directionality, several techniques have been utilized to control this important characteristic using optical waveguides, lowdimensional cavities, and a specific structure for the random laser (Turitsyn et al, 2014;Schönhuber et al, 2016;Wetter and Jimenez-Villar 2019;Kumar et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Dye-Doped Fe3O4 Nanoparticles for Magnetically Controlling Random Laser Parameters at Visible Wavelengths: Literature Review and Experiment

Al-Samak¹,

Jassim²

2022

Indonesian J. Sci. Technol

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The development of light-controlled electronic devices requires new possibilities of optical control via tuning of laser input parameters. Here, Fe3O4 superparamagnetic nanoparticles (SNPs) were doped with dye, and the controllability of parameters of a random laser, including the wavelength, threshold energy, and intensity under the absence and presence of an external magnetic field was studied. The prepared dye laser (Rh-640) showed strong magnetic controllability and switch ability under different pumping energies (1‒7 mJ), as well as good responsivity and durability at visible wavelengths. The applied magnetic field was utilized to modify the distribution of Fe3O4 SNPs with different concentrations and scattering behavior, altering the generation of coherent loops and laser action properties. Thus, it was possible to employ the magnetically controllable random laser in a variety of technological applications, including biology and optical communications

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Random laser materials: from ultrahigh efficiency to very low threshold (Anderson localization)

Cited by 6 publications

References 51 publications

Ca²⁺/Sr²⁺/Ba²⁺ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass

Ca²⁺/Sr²⁺/Ba²⁺ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass

Random Lasers as Social Processes Simulators

Dye-Doped Fe3O4 Nanoparticles for Magnetically Controlling Random Laser Parameters at Visible Wavelengths: Literature Review and Experiment

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Random laser materials: from ultrahigh efficiency to very low threshold (Anderson localization)

Cited by 6 publications

References 51 publications

Ca2+/Sr2+/Ba2+ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass

Ca2+/Sr2+/Ba2+ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass

Random Lasers as Social Processes Simulators

Dye-Doped Fe3O4 Nanoparticles for Magnetically Controlling Random Laser Parameters at Visible Wavelengths: Literature Review and Experiment

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Product

Resources

About

Ca²⁺/Sr²⁺/Ba²⁺ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass

Ca²⁺/Sr²⁺/Ba²⁺ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass