Polymeric solid-state dye lasers: Recent developments

Costela, Á.; García‐Moreno, Inmaculada; Sastre, R.

doi:10.1039/b307700b

Cited by 176 publications

(122 citation statements)

References 64 publications

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“…As a result, research has been conducted on determining the photophysical properties of these dyes in polymer hosts in comparison to isotropic liquid solvents. 12,13 It has been found that to a large extent, the photophysical and photochemical processes are determined by the polarity of the solvent. Generally, the emission of the dye is a result of intramolecular charge transfer between electron-donating and electronaccepting units.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…Organic materials have a broad range of applications such as high-resolution fluorescence microscopy [1][2][3][4][5][6][7], second harmonic generation (SHG) microscopy [8][9][10][11][12], dye sensitized and polymer solar cells [13][14][15][16][17], solid state dye/organic lasers [18][19][20], and organic light emitting diodes [21,22], to name a few. Photostability of organic compounds and polymers is often a requirement for applications incorporating light-matter interaction [2-4, 6, 8, 18-20, 23-30].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic studies of the mechanism of reversible photodegradation of 1-substituted aminoanthraquinone-doped polymers

Hung

Bhuyan

Schademan

et al. 2016

The Journal of Chemical Physics

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The mechanism of reversible photodegradation of 1-substituted aminoanthraquinones doped into poly(methyl methacrylate) and polystyrene is investigated. Time-dependent density functional theory is employed to predict the transition energies and corresponding oscillator strengths of the proposed reversibly-and irreversibly-damaged dye species. Ultraviolet-visible and Fourier transform infrared (FTIR) spectroscopy are used to characterize which species are present. FTIR spectroscopy indicates that both dye and polymer undergo reversible photodegradation when irradiated with a visible laser. These findings suggest that photodegradation of 1-substituted aminoanthraquinones doped in polymers originates from interactions between dyes and photoinduced thermally-degraded polymers, and the metastable product may recover or further degrade irreversibly. INTRODUCTIONOrganic materials have a broad range of applications such as high-resolution fluorescence microscopy [1][2][3][4][5][6][7], second harmonic generation (SHG) microscopy [8][9][10][11][12], dye sensitized and polymer solar cells [13][14][15][16][17], solid state dye/organic lasers [18][19][20], and organic light emitting diodes [21,22], to name a few. Photostability of organic compounds and polymers is often a requirement for applications incorporating light-matter interaction [2-4, 6, 8, 18-20, 23-30]. When a material undergoes photodegradation, its characteristic properties deteriorate over time, which is referred to as decay; the reverse change in the characteristic properties of the material is referred to as recovery. Though photodegradation is often irreversible, the recovery process has been observed from a large variety of materials, typically involving polymers and often together with dyes, with various experimental techniques when the photodegraded materials are kept in dark for a long enough time, typically hours to days [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44].Amplified spontaneous emission (ASE) of disperse orange 11 (DO11) doped in poly(methyl methacrylate) (PMMA) bulk sample was observed to fully recover in the dark about 40 hours after photodegradation when irradiated with a 532 nm second harmonic Nd:YAG picosecond laser [33]. This self-healing phenomenon was also observed in various anthraquinone derivatives doped in PMMA and polystyrene (PS) thin films [41,42] and DO11 doped in MMA-styrene copolymers thin films [42,45] probed with transmittance image microscopy and ASE. The photodegraded thin film samples are often observed to recover partially, which suggests there exists both reversible and irreversible photodegradation. The lack of evidence for linear dichroism during photodegradation measurements eliminates orientational hole burning as the mechanism causing reversible photodegra- [38,42,46,[50][51][52][53][54], they have failed to elucidate the underlying mechanism.Several hypotheses of the mechanism responsible for reversible photodegradation in DO11/PMMA have been proposed, including intramolecular proton transfer and ...

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“…Izatez, gaur egun, seguru asko laser sintonizagarrien ingurune-aktibo erabilienetarikoak dira, eta euren laser-portaera ezin hobeagatik erreferentzia-sistematzat hartu dira [8]. Aurreko baldintzak betetzeaz gain, BODIPYen abantaila nagusienetarikoa nukleo kromoforikoaren aldakortasun kimikoan datza [9].…”

Section: Edurne Avellanal-zaballa Ixone Esnal Jorge Bañuelosunclassified

Ikusgai-eremu elektromagnetiko osoan zehar igorpen sintonizagarria duten BODIPY laser-koloratzaileak

Avellanal‐Zaballa

Esnal

Bañuelos

2018

EKAIA

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Laburpena: Lan honetan, molekula-egiturak BODIPY deritzen koloratzaileen propietate fotofisikoetan duen eragina aztertzen da, gehienbat alde ikusgai gorritik urdinera laser sintonizagarrien ingurune aktiboa garatzeko. BODIPYaren ordezkapen-patroiaren arabera propietate espektroskopikoak modula eta optimiza daitezke. Horrela, BODIPYaren oinarrizko kromoforoa abiapuntutzat hartuta (absortzio/igorpen eremu ikusgai berde/horian) aldaketak egin dira egitura molekularrean banda espektralak lerrokatzeko, bai eremu urdinera (heteroatomoak meso posizioan sartuz), bai eremu gorrira (π sistema deslokalizatua hedatuz). Ondorioz, koloratzaile komertzialekin konparatuz gero, eremu espektral ikusgai osoa betetzen duten BODIPY koloratzaile berriak garatu dira, propietate fotofisiko eta laser hobetuekin.Hitz gakoak: laser-koloratzaileak, propietate fotofisikoak, igorpen sintonizagarria. Abstract:The herein reported work deals with the photophysical signatures of the dyes known as BODIPY. In particular, it is focused on the molecular structure impact towards the development of active media for tunable dye lasers from the blue to the red edge of the visible region. The spectroscopic properties of BODIPYs can be finely modulated and improved just changing the substitution pattern. Thus, taking as starting point the simplest core (absorption/emission at the green/yellow visible region) and after suitable chemical modifications of the backbone, its spectral bands can be deeply shifted to the blue (heteroatoms at meso position) as well as to the red-edge (extended π-system). Therefore, novel BODIPY dyes covering the whole visible spectral region have been developed with improved photophysical and laser performance with regard to the comercially available dyes.

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Polymeric solid-state dye lasers: Recent developments

Cited by 176 publications

References 64 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

Spectroscopic studies of the mechanism of reversible photodegradation of 1-substituted aminoanthraquinone-doped polymers

Ikusgai-eremu elektromagnetiko osoan zehar igorpen sintonizagarria duten BODIPY laser-koloratzaileak

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