Dependence of random laser emission on silver nanoparticle density in PMMA films containing rhodamine 6G

Dominguez, C. Tolentino; Maltez, R.L.; Reis, Roberto dos; Melo, Letícia Santos Alves de; Araújo, Cid B. de; Gomes, Anderson S. L.

doi:10.1364/josab.28.001118

Cited by 61 publications

(45 citation statements)

References 28 publications

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“…Similar to the case of the BC-silica NPs as well as in Ref. 13, the RL wavelength was centered at %567 nm, near the maximum of the luminescence band.…”

Section: Resultssupporting

confidence: 77%

“…RLs using Ag NPs as responsible for enhanced emission was reported before with poly(methylmethacrylate)-PMMA-as the host medium 13 or other polymers, 33,34 whereby even in the weakly scattering regime arising from the NPs smaller size and crosssection, coherent RL emission has been observed. 34 In the present case, the Ag NPs were introduced in the BC membrane as described in Sec.…”

Section: Resultsmentioning

confidence: 63%

“…13 and the RL threshold is of the same order of magnitude. In RL with metallic NPs besides the feedback mechanism due to multiple scattering of light, the local field in the vicinity of the NPs is large and then the molecules located nearby the NPs present larger radiative transition probability than the molecules far from the metallic particles.…”

Section: Resultsmentioning

confidence: 90%

“…7-11. After the demonstration by Lawandy et al 12 of RLs based on dye solutions containing TiO 2 nanoparticles (NPs), there has been a rapid growth in this field and RL action has been observed in a large variety of systems such as dye doped polymer films, 13 semiconductor powders, 14,15 organic-inorganic hybrids, 16 and optical fibers. 17 From the biophotonics point of view, RLs in biomaterials have been reported in Refs.…”

Section: Introductionmentioning

confidence: 99%

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Random laser action from flexible biocellulose-based device

Santos

Dominguez

Schiavon

et al. 2014

Journal of Applied Physics

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A flexible organic random laser based on poly(9,9-dioctylfluorene) deposited on a surface corrugated polyphthalate-carbonate substrate Appl. Phys. Lett. 98, 253304 (2011) We demonstrate random lasing action in flexible bacterial cellulose (BC) membrane containing a laser-dye and either dielectric or metallic nanoparticles (NPs). The novel random laser system consists of BC nanofibers attached with Rhodamine 6G molecules and having incorporated either silica or silver NPs. The laser action was obtained by excitation of the samples with a 6 ns pulsed laser at 532 nm. Minimum laser threshold of %0.7 mJ/pulse was measured for the samples with silica NPs, whereas a laser threshold of 2.5 mJ/pulse for a system based on silver NPs was obtained. In both cases a linewidth narrowing from %50 to %4 nm was observed. Potential applications in biophotonics and life sciences are discussed for this proof-of-concept device. V C 2014 AIP Publishing LLC. [http://dx

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“…Similar to the case of the BC-silica NPs as well as in Ref. 13, the RL wavelength was centered at %567 nm, near the maximum of the luminescence band.…”

Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Random laser action from flexible biocellulose-based device

Santos

Dominguez

Schiavon

et al. 2014

Journal of Applied Physics

Self Cite

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“…[1][2][3][4][5][6][7][8][9][10][11] The random structures can be expected to be utilized for easily fabricated and low-cost applications such as surfaceemitting devices, because the disorder (i.e., simple nanoparticle assembly or self-generated surface roughness) plays an important role for randomly distributed feedback due to the interference effects of recurrent multiple scattered light. However, considering the potential applications, the randomness should also raise issues of lasing mode controllability such as wavelength, location, and number of lasing modes.…”

mentioning

confidence: 99%

Low-threshold and quasi-single-mode random laser within a submicrometer-sized ZnO spherical particle film

Fujiwara¹,

Niyuki²,

Ishikawa³

et al. 2013

Applied Physics Letters

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Metal–Dielectric Core–Shell Nanoparticles: Advanced Plasmonic Architectures Towards Multiple Control of Random Lasers

Meng

Fujita

Moriguchi

et al. 2013

Advanced Optical Materials

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Random lasing properties of dye solutions suspended with gold–silica core–shell nanoparticles are investigated. The core–shell architecture allows adjustment of plasmon coupling strength between metal and optical gain media by varying the thickness of dielectric shell. Consequently, multiple aspects of random lasers can be controlled, such as mode interactions, lasing spikiness, and pump threshold. The results show that bare gold nanoparticles give rise to the most profound lasing spikes that are evenly separated in resonant wavelength. The lowest threshold is observed when the shell thickness is ~14.6 nm. The experimental observations are interpreted in terms of resonant coupling between metal nanoparticles and fluorophores, localization of pump light and lasing modes at the surface of metal, as well as plasmonic modifications of absorption and pump rates of fluorophores. The results suggest that metal–dielectric core–shell nanostructures can serve as promising candidates towards development of well‐controlled random lasers.

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Dependence of random laser emission on silver nanoparticle density in PMMA films containing rhodamine 6G

Cited by 61 publications

References 28 publications

Random laser action from flexible biocellulose-based device

Random laser action from flexible biocellulose-based device

Low-threshold and quasi-single-mode random laser within a submicrometer-sized ZnO spherical particle film

Metal–Dielectric Core–Shell Nanoparticles: Advanced Plasmonic Architectures Towards Multiple Control of Random Lasers

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