Random lasers with coherent feedback from highly transparent polymer films embedded with silver nanoparticles

Meng, Xianwei; Fujita, Koji; Zong, Yanhua; Murai, Shinji; Tanaka, Katsuhisa

doi:10.1063/1.2912527

Cited by 139 publications

(116 citation statements)

References 17 publications

(19 reference statements)

Supporting

Mentioning

113

Contrasting

Unclassified

Order By: Relevance

“…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. II.…”

Section: Resultsmentioning

confidence: 99%

Random laser action from flexible biocellulose-based device

Santos

Dominguez

Schiavon

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

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

show abstract

Section: Resultsmentioning

confidence: 99%

Random laser action from flexible biocellulose-based device

Santos

Dominguez

Schiavon

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…Several authors have demonstrated that metal-nanoparticles dye random laser systems not only operate better than the dielectric based random lasers, but that they also work at extremely weak scattering strengths, as a result of the highly localized optical modes due to surface plasmon resonance (SPR) [37]. Moreover the lasing properties were dramatically improved when the SPR or the 'scattering resonance' wavelength of the metal particles overlapped the dye emission [35].…”

Section: Resultsmentioning

confidence: 99%

“…In these systems, metal nanoparticles may enhance the lasing efficiency by intensifying the scattering strength and/or the dye fluorescence by means of an enhanced localized field. Incoherent and coherent feedback have been demonstrated and related both to scattering and plasmon efficiency [34][35][36][37].…”

Section: Resultsmentioning

confidence: 99%

Effects of Au nanoparticles on photoluminescence emission from Si-vacancy in diamond

Orlanducci

Cianchetta

Tamburri

et al. 2012

Chemical Physics Letters

View full text Add to dashboard Cite

“…Such a situation is not achievable in formerly considered RL: in the fixed disorder case [4], the structure cannot be externally changed; while in the colloidal RL [6] the considered dielectric nano-particles, [18][19][20][21] are too light to exhibit a switchable granular behavior. Various authors also investigated RL by metallic nano-particles [22][23][24][25], however, so far, only particles with diameters of tens of nanometers were considered, which do not exhibit granular behavior because are not substantially affected by gravity. In these systems, thermal equilibrium largely limits the observable fluctuations with respect to out-of-equilibrium granulars.…”

mentioning

confidence: 99%

Shaken Granular Lasers

et al. 2012

View full text Add to dashboard Cite

Granular materials have been studied for decades, also driven by industrial and technological applications. These very simple systems, composed by agglomerations of mesoscopic particles, are characterized, in specific regimes, by a large number of metastable states and an extreme sensitivity (e.g., in sound transmission) on the arrangement of grains; they are not substantially affected by thermal phenomena, but can be controlled by mechanical solicitations. Laser emission from shaken granular matter is so far unexplored; here we provide experimental evidence that it can be affected and controlled by the status of motion of the granular, we also find that competitive random lasers can be observed. We hence demonstrate the potentialities of gravity affected moving disordered materials for optical applications, and open the road to a variety of novel interdisciplinary investigations, involving modern statistical mechanics and disordered photonics.Introduction -In random lasers (RLs) stimulated emission is achieved by disorder-induced light scattering [1][2][3][4][5][6][7][8][9][10][11], as observed in colloidal systems, composed by small particles suspended in thermal equilibrium in a solution, or in materials exhibiting a fixed disorder, achieved, e.g., by nano-fabrication. RLs in shaken grains were not reported. Granular materials (sands, powders, seeds, cements, etc.) [12,13] are an extensively studied branch of statistical mechanics, with several important applications in chemistry or engineering. These systems are not affected by temperature, and are mostly dominated by dynamical effects, while being one of the paradigms of the statistical mechanics of disordered systems and still lacking general and universal theoretical descriptions. Granular gases [14,15], i.e., massive particles in rapid movement with inelastic collisions, are obtained by putting grains under mechanical oscillation. By a driving solicitation, a gravity-sedimented ensemble of grains switches, above a critical mechanical energy, from a solid-like state to a gaseous one, whose essential feature is the strong enhancement of fluctuations and the non-equilibrium character [16,17]: even in such a dilute configuration, regions with high density may appear. Such a state can only be maintained by continuously furnishing mechanical energy. This circumstance may have relevant implications when considering random lasing in shaken granulars, which happens when energy is furnished to the system not only mechanically, but also optically, by employing a lightemitting active medium. The specific and characteristic arrangements of the shaken grains not only can alter the RL features, but, as we demonstrate in this work, in the gaseous-like phase, may lead to the occurrence of competing RL emissions, which can be controlled by acting on the external mechanical solicitation. Such a situation is not achievable in formerly considered RL: in the fixed disorder case [4], the structure cannot be externally changed; while in the colloidal RL [6] the considered diele...

show abstract

Random lasers with coherent feedback from highly transparent polymer films embedded with silver nanoparticles

Cited by 139 publications

References 17 publications

Random laser action from flexible biocellulose-based device

Random laser action from flexible biocellulose-based device

Effects of Au nanoparticles on photoluminescence emission from Si-vacancy in diamond

Shaken Granular Lasers

Contact Info

Product

Resources

About