Amplified spontaneous emission from a conjugated polymer undergone a high-temperature lithography cycle

Pisignano, Dario; Mele, Elisa; Persano, Luana; Paladini, Giovanni; Cingolani, R.

doi:10.1063/1.1946189

Cited by 14 publications

(10 citation statements)

References 29 publications

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“…Moreover, they are comparable to those of typical semiconducting polymers [17,22,26,27,28,29,30,31,32]. It is important to note, that in the case of PS films doped with TPD the lowest thresholds were obtained with films doped with 20-30 wt% of active material, while in the case of polymers they are neat films (100% of active material).…”

Section: Resultssupporting

confidence: 57%

“…TPD presents ASE thresholds [ 22 ] as low as 1 kW/cm 2 for PS doped with 30 wt% of TPD, that are among the lowest reported in the literature for molecular materials. Moreover, they are comparable to those of typical semiconducting polymers [ 17 , 22 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. It is important to note, that in the case of PS films doped with TPD the lowest thresholds were obtained with films doped with 20-30 wt% of active material, while in the case of polymers they are neat films (100% of active material).…”

Section: Resultsmentioning

confidence: 54%

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Optimization of the Laser Properties of Polymer Films Doped with N,N´-Bis(3-methylphenyl)-N,N´-diphenylbenzidine

2009

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This review compiles the work performed in the field of organic solid-state lasers with the hole-transporting organic molecule N,N´-bis(3-methylphenyl)-N,N´-diphenyl-benzidine system (TPD), in view of improving active laser material properties. The optimization of the amplified spontaneous emission characteristics, i.e., threshold, linewidth, emission wavelength and photostability, of polystyrene films doped with TPD in waveguide configuration has been achieved by investigating the influence of several materials parameters such as film thickness and TPD concentration. In addition, the influence in the emission properties of the inclusion of a second-order distributed feedback grating in the substrate is discussed.

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Section: Resultssupporting

confidence: 57%

Section: Resultsmentioning

confidence: 54%

Optimization of the Laser Properties of Polymer Films Doped with N,N´-Bis(3-methylphenyl)-N,N´-diphenylbenzidine

2009

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“…The measured loss coefficient of the MC waveguide is R ) 5.7 ( 0.7 cm -1 . This value is quite interesting, 1 order of magnitude lower than that found in the poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene], 32 and of the same order of the best results reported for conjugated polyfluorenes 33 and poly[(9,9-hexylfluorenyl-2,7ditl)-alt-co-(9-ethyl-3,6-carbazole)]s. 34 The Stokes' shift for the investigated MC is indeed in the range 270-430 meV (i.e., a wavelength distance between the absorption and the emission maxima, ∆λ, of 80-140 nm depending on the emission spectral profile), determining low self-absorption losses.…”

Section: Resultsmentioning

confidence: 90%

Amplified Spontaneous Emission and Waveguiding Properties of the Colored Merocyanine Form of (1‘,3‘-Dihydro-1‘,3‘,3‘-trimethyl-6- nitrospiro[2H-1-benzopyran-2,2‘-(2H)-indole] Molecules

et al. 2006

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We report a complete study of the properties of amplified spontaneous emission (ASE) of the merocyanine form of the photochromic system, 1′,3′-dihydro-1′,3′,3′-trimethyl-6-nitrospiro[2H-1benzopyran-2,2′-(2H)-indole], under nanosecond excitation conditions. ASE line narrowing is clearly observed for excitation densities larger than 400 µJ cm -2 with a threshold pumping length in the range 0.5-1.2 mm. Remarkable waveguiding properties were observed, with losses throughout the organic slab of about 5.7 cm -1 . The observation of ASE is discussed in terms of a possible S 1 -dominated photoconversion and excitation/de-excitation dynamics of the photochromic system. These results are important in view of the application of merocyanine-based films as active layers for potentially gateable laser devices.

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“…4b which exhibits a fast increase below 0.4 kW cm −2 , then slows down and becomes almost saturated at ∼ 2 kW cm −2 . This behavior resembles the amplified spontaneous emission (ASE) assisted by a waveguide mode from the substrate [31]. The saturation of the emission intensity is probably due to the intrinsic absorption limit of molecules and the amount of the gain material.…”

Section: Emission Spectra As a Function Of Pump Powermentioning

confidence: 76%

Inducing lasing in organic materials with low optical gain by three-dimensional plasmonic nanocavity arrays

Han

Wang

et al. 2019

Opt. Express

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Lasing in organic media with very low gain has been pursued for a long time in optoelectronics. Here, we experimentally demonstrate that plasmonic lasing in the visible regime at room temperature can be achieved by hybridizing active media of very low optical gain such as ionic liquid and polymethylmethacrylate with three-dimensional (3D) plasmonic metamaterials. The 3D nanostructure consists of a double-layer N-shaped silver wire-hole array with strongly coupled multiple hot spots densely packed in each unit cell. These hot spots overlap perfectly with the gain media, allowing efficient gain-plasmon coupling in subwavelength volumes. The periodic arrangement of hot spots, as the metal and dielectric are distributed in an alternate manner along both transverse and vertical directions, results in ultrastrong suppression of scattering losses. In addition, the lasing characteristics, including threshold, intensity and polarization can be controlled by the lattice constant and geometry of metamaterials. Such a plasmonic nanolaser proves to be of low threshold and low gain requirement, providing an essential step towards easy-processing organic based optoelectronics.

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Amplified spontaneous emission from a conjugated polymer undergone a high-temperature lithography cycle

Abstract: Articles you may be interested inEnhancement of optical gain and amplified spontaneous emission due to waveguide geometry in the conjugated polymer poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylene vinylene] Appl.

Cited by 14 publications

References 29 publications

Optimization of the Laser Properties of Polymer Films Doped with N,N´-Bis(3-methylphenyl)-N,N´-diphenylbenzidine

Optimization of the Laser Properties of Polymer Films Doped with N,N´-Bis(3-methylphenyl)-N,N´-diphenylbenzidine

Amplified Spontaneous Emission and Waveguiding Properties of the Colored Merocyanine Form of (1‘,3‘-Dihydro-1‘,3‘,3‘-trimethyl-6- nitrospiro[2H-1-benzopyran-2,2‘-(2H)-indole] Molecules

Inducing lasing in organic materials with low optical gain by three-dimensional plasmonic nanocavity arrays

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