Efficiency and photostability of dye-doped solid-state lasers in different hosts

Yariv, Eli; Schultheiss, Silke; Saraidarov, Tsiala; Reisfeld, R.

doi:10.1016/s0925-3467(00)00056-2

Cited by 121 publications

(65 citation statements)

References 17 publications

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“…Fluorescence lifetimes of PM597 and PM580, on the other hand, are reported to be higher in ethanol, being closer to 7 ns. 25 Therefore, we expect that the lifetimes of the PM dyes in the LC host will be slightly longer than those already measured for DCM.…”

Section: Fluorescence Lifetimesmentioning

confidence: 80%

Comparison of the performance of photonic band-edge liquid crystal lasers using different dyes as the gain medium

Mowatt

Morris

Song

et al. 2010

Journal of Applied Physics

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The primary concern of this work is to study the emission characteristics of a series of chiral nematic liquid crystal lasers doped with different laser dyes ͑DCM, pyrromethene 580, and pyrromethene 597͒ at varying concentrations by weight ͑0.5-2 wt %͒ when optically pumped at 532 nm. Long-wavelength photonic band-edge laser emission is characterized in terms of threshold energy and slope efficiency. At every dye concentration investigated, the pyrromethene 597-doped lasers exhibit the highest slope efficiency ͑ranging from 15% to 32%͒ and the DCM-doped lasers the lowest ͑ranging from 5% to 13%͒. Similarly, the threshold was found to be, in general, higher for the DCM-doped laser samples in comparison to the pyrromethene-doped laser samples. These results are then compared with the spectral properties, quantum efficiencies and, where possible, fluorescence lifetimes of the dyes dispersed in a common nematic host. In accordance with the low thresholds and high slope efficiencies, the results show that the molar extinction coefficients and quantum efficiencies are considerably larger for the pyrromethene dyes in comparison to DCM, when dispersed in the liquid crystal host.

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Section: Fluorescence Lifetimesmentioning

confidence: 80%

Comparison of the performance of photonic band-edge liquid crystal lasers using different dyes as the gain medium

Mowatt

Morris

Song

et al. 2010

Journal of Applied Physics

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“…φ f was estimated by comparing the absorption and emission spectra to those of a known standard φ x according to the following relation [15]:…”

Section: Methods Of Calculationmentioning

confidence: 99%

Optical, photo-physical properties and photostability of pyrromethene (PM-597) in ionic liquids as benign green-solvents

AL-Aqmar

Abdelkader

Kana

2015

Journal of Luminescence

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“…[2] Due to the inherent characteristics of dye lasers, they have found applications in a wide range of fields, from medicine and industry to science (mainly in chemistry, physics and biology). [3] The development of new active media for improving the lasing efficiency is focused on three different aspects: a) the modification of the dye structure, looking for more rigid structures that diminish the nonradiative processes and, hence, increase the fluorescence quantum yield; [4] b) the incorporation of the dye in new environments, such as polymers, sol-gel materials, nanocomposites, [5][6][7][8][9] looking for good solid-state dye lasers that provide more technological and commercial advantages (i.e., absence of bulky flow systems and solvents, better manageability and miniaturisation of the experimental setup) than those obtained in the liquid state and c) the synthesis of new laser dye families.…”

Section: Introductionmentioning

confidence: 99%

Intramolecular Charge Transfer in Pyrromethene Laser Dyes: Photophysical Behaviour of PM650

et al. 2004

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Absorption and fluorescence (steady-state and time-correlated) techniques are used to study the photophysical characteristics of the pyrromethene 650 (PM650) dye. The presence of the cyano group at the 8 position considerably shifts the absorption and fluorescence bands to lower energies with respect to other related pyrromethene dyes; this is attributed to the strong electron-acceptor character of the cyano group, as is theoretically confirmed by quantum mechanical methods. The fluorescence properties of PM650 are intensively solvent-dependent. The fluorescence band is shifted to lower energies in polar/protic solutions, and the evolution of the corresponding wavelength with the solvent is analysed by a multicomponent linear regression. The fluorescence quantum yield and the lifetime strongly decrease in polar/protic solvents, which can be ascribed to an extra nonradiative deactivation, via an intramolecular charge-transfer state (ICT state), favoured in polar media.

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Efficiency and photostability of dye-doped solid-state lasers in different hosts

Cited by 121 publications

References 17 publications

Comparison of the performance of photonic band-edge liquid crystal lasers using different dyes as the gain medium

Comparison of the performance of photonic band-edge liquid crystal lasers using different dyes as the gain medium

Optical, photo-physical properties and photostability of pyrromethene (PM-597) in ionic liquids as benign green-solvents

Intramolecular Charge Transfer in Pyrromethene Laser Dyes: Photophysical Behaviour of PM650

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