Dye‐Doped POSS Solutions: Random Nanomaterials for Laser Emission

Costela, Á.; García‐Moreno, Inmaculada; Cerdán, Luis; Martín, M.V.; Garcı́a, Olga; Sastre, R.

doi:10.1002/adma.200900799

Cited by 68 publications

(36 citation statements)

References 16 publications

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“…It is a significant result because in the case of varying spectral pattern it would indicate inhomogeneous scattering inside the material and random lasing (RL). [3][4][5][6] An important laser parameter is the dependence of the output from the pump pulse energy (laser curve). It has to be noted that this characteristic is individual for a laser, i.e., it depends on the properties of the resonator as well as pumping conditions.…”

Section: Lasing From the Dye Embedded Transparent Woodmentioning

confidence: 99%

“…For example, vertical-cavity surface-emitting lasers, noncavity scattering feedback lasers, so called "random lasers," lasers implementing surface plasmon polariton resonances-SPASERs, fiber lasers, lasers based on Raman or Brillouin scattering, etc. [1][2][3][4][5][6][7][8][9][10][11][12] The ORCID identification number(s) for the author(s) of this article can be found under http://dx.doi.org/10.1002/adom.201700057.…”

Section: Introductionmentioning

confidence: 99%

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Lasing from Organic Dye Molecules Embedded in Transparent Wood

Vasileva

Sychugov

et al. 2017

Advanced Optical Materials

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In this report, we demonstrate lasing action from a novel gain material containing organic dye Rhodamine 6G (Rh6G) embedded into transparent wood (TW) matrix. Besides the unusual origin and appearance of the investigated material, it has numerous advantages defined by the properties of components used for its fabrication. Organic dyes are of special interest as active media due to their broadband emission/absorption spectra and very high optical gain. [13][14][15] Transparent wood features light weight, modification accessibility, excellent mechanical performance, and structural anisotropy introduced by aligned hollow cells. [16,17] Optical transparency of TW is the most unique property, which extends its applications in various fields, including biosciences, lighting, building industry, and others. [17][18][19] Although this material (TW) is relatively new, it has already been tested for potential applications in optics, but so far only for implementation in passive photonic components. [18] However, due to its compatibility with polymer technology, TW is an interesting alternative for applications requiring optical activity, first of all lasing, where demanded materials should be inexpensive, easily handled and disposable. Material Preparation and CharacterizationAs the TW itself does not possess any optical gain, a host matrix should be "activated" with an additional optically active medium, Rh6G dye in our case. The samples with dye embedded into TW structure were prepared in three technological steps (Figure 1). At the first step, balsa wood (Ochroma pyramidale, purchased from Wentzels Co. Ltd, Sweden) of thickness of 1.0 mm and 3.0 mm was delignified using 1 wt% of sodium chlorite (NaClO 2 , Sigma-Aldrich) in acetate buffer solution (pH 4.6) at 80 °C, until the wood was totally bleached. Then the delignified wood was dehydrated with ethanol and acetone, sequentially; each procedure was repeated three times. At the second step, wood template was put in dye (Rh6G 99%, SIGMA-ALDRICH) acetone solution with a concentration of 1 × 10 −3 mole/L. Finally, the wood template was fully infiltrated into the pre-polymerized MMA solution and then cured at 75 °C for 4 h.The surface and cross-sections of the TW samples were investigated with a field-emission scanning electron microscope (Hitachi S-4800, Japan) operating at an acceleration voltage of 1 kV. The samples were roughly polished and coated with Pt/Pd before SEM imaging. The length of fibers constituting the wood material varies in range of 200-1000 µm, whereas the lumen The report on a study of laser emission from a conceptually new organic material based on transparent wood (TW) with embedded dye Rhodamine 6G molecules is presented in this paper. The lasing performance is compared to a reference organic material containing dye in a poly-methyl-methacrylate matrix. From experimental results, one can conclude that the optical feedback in dye-TW material is realized within cellulose fibers, which play the role of tiny optical resonators. Therefore, the output emis...

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Section: Lasing From the Dye Embedded Transparent Woodmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lasing from Organic Dye Molecules Embedded in Transparent Wood

Vasileva

Sychugov

et al. 2017

Advanced Optical Materials

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“…This fact can be related to our initial hypothesis: the POSS particles, with sizes below 5 nanometers, act as weak scattering centers in the Rayleigh limit (particle size much smaller than the emission wavelength), increasing the effective optical path inside the gain medium in a process known as non-resonant feedback (NRF) lasing, which add up incoherently to the conventional laser action in a way that increases the efficiency of the laser system. [8,22] Under laser irradiation, the opening up of this new non-resonant feedback pathway explains the high laser performance of the new BDP-POSS cluster as well as the lack of correlation with its photophysical properties which are recorded under much lower excitation intensities.…”

Section: Influence Of the Bdp-poss Click Assembly: Mono-substitution mentioning

confidence: 99%

“…[7] We demonstrated, for the first time to the best of our knowledge, the behaviour of POSS doped systems as disordered nanomaterials, a possibility never considered before. [8] The dispersion of POSS nanoparticles at a molecular level defines highly homogeneous materials that, when doped with lasing dyes, allow coherent laser emission but, in addition and in spite of their nanometer size, the POSS particles sustain a weak optical scattering that helps lasing by elongating the light path inside the gain media, thus providing an extra feedback, a phenomenon central to the process called "incoherent random laser" or "lasing with intensity feedback". [9] In this way, the laser action in systems based on dye-doped POSS materials is significantly enhanced, both in liquid-and solidphase.…”

Section: Introductionmentioning

confidence: 99%

Click Assembly of Dye‐Functionalized Octasilsesquioxanes for Highly Efficient and Photostable Photonic Systems

Pérez‐Ojeda

Trastoy

López‐Arbeloa

et al. 2011

Chemistry A European J

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New hybrid organicinorganic dyes based on an azidefunctionalized octasilsesquioxane (POSS) as inorganic part and a 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BDP) chromophore as the organic component have been synthesized by copper(I)-catalyzed 1,3-dipolar cycloaddition of azides to alkynes. We have studied the effect of the linkage group of BDP to the POSS unit and the degree of functionalization of this inorganic core on the optical properties by comparison with model dyes. The high fluorescence ability of the BDP dye is preserved in spite of the linked chain at its meso position and even after attaching one BDP to the POSS core. The laser action of the new dyes has been analyzed under transversal pumping at 532 nm in both liquid phase and when incorporated into solid polymeric matrices. The new hybrid dye exhibits high lasing efficiency of up to 56% with high photostability, with its laser output remaining at the initial value after 4×10 5 pump pulses in the same position of the sample at 30 Hz repetition rate. Nonetheless, the functionalization of the POSS core with eight fluorophores leads to dye aggregation, as quantum mechanics simulation reveals, worsening the optical properties and extinguishing the laser action. The new hybrid systems based on dye-linked POSS nanoparticles opens up the possibility of using these new photonic materials as alternative sources for optoelectronic devices, competing with dendronized or grafted polymers.

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“…That report was followed by a great number of papers from different authors that investigated on other physical systems for efficient RL operation. A large variety of materials has been tested in the past years, and recent publications on RLs describe, for example, experiments with dyes dissolved in transparent liquids, gels or liquid crystals with suspended micro or nanoparticles as light scatterers [12][13][14][15][16][17], powders of semiconductor quantum dots [18,19], dielectric nanocrystals doped with rare-earth ions [20,21], polymers and organic membranes doped by luminescent molecules [22][23][24][25][26][27], semiconductor and metallic nanowires structures [28][29][30][31], and even atomic vapors that present analogies with astrophysical lasers [32].…”

Section: Introductionmentioning

confidence: 99%

Lévy Statistics and Glassy Behavior of Light in Random Fiber Lasers

Araújo¹,

Gomes²,

Raposo³

2017

Preprint

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Abstract:The interest in random fiber lasers (RFLs), first demonstrated one decade ago, is still growing and their basic characteristics have been studied by several authors. RFLs are open systems that present instabilities in the intensity fluctuations due to the energy exchange among their non-orthogonal quasi-modes. In this work, we present a review of the recent investigations on the output characteristics of a continuous-wave erbium-doped RFL, with emphasis on the statistical behavior of the emitted intensity fluctuations. A progression from the Gaussian to Lévy and back to the Gaussian statistical regime was observed by increasing the excitation laser power from below to above the RFL threshold. By analyzing the RFL output intensity fluctuations, the probability density function of emission intensities was determined, and its correspondence with the experimental results was identified, enabling a clear demonstration of the analogy between the RFL phenomenon and the spin-glass phase transition. A replica-symmetry-breaking phase above the RFL threshold was characterized and the glassy behavior of the emitted light was established. We also discuss perspectives for future investigations on RFL systems.

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Dye‐Doped POSS Solutions: Random Nanomaterials for Laser Emission

Cited by 68 publications

References 16 publications

Lasing from Organic Dye Molecules Embedded in Transparent Wood

Lasing from Organic Dye Molecules Embedded in Transparent Wood

Click Assembly of Dye‐Functionalized Octasilsesquioxanes for Highly Efficient and Photostable Photonic Systems

Lévy Statistics and Glassy Behavior of Light in Random Fiber Lasers

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Dye‐Doped POSS Solutions: Random Nanomaterials for Laser Emission

Cited by 68 publications

References 16 publications

Lasing from Organic Dye Molecules Embedded in Transparent Wood

Lasing from Organic Dye Molecules Embedded in Transparent Wood

Click Assembly of Dye‐Functionalized Octasilsesquioxanes for Highly Efficient and Photostable Photonic Systems

L&eacute;vy Statistics and Glassy Behavior of Light in Random Fiber Lasers

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Lévy Statistics and Glassy Behavior of Light in Random Fiber Lasers