Operating characteristics of a traveling-wave semiconducting polymer optical amplifier

Heliotis, G.; Bradley, Donal D. C.; Goossens, M.; Richardson, S.; Turnbull, Graham A.; Samuel, Ifor D. W.

doi:10.1063/1.1835555

Cited by 16 publications

(10 citation statements)

References 16 publications

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“…A maximum gain of 5.5 cm −1 and 4.2 cm −1 is found in LDS 720‐based and IR 140‐based fibers, respectively, making them suitable systems for the potential implementation of nanolaser sources and optical amplifiers assisted by the fiber waveguiding properties . These values have to be related to the local excitation conditions and orientation of transition dipoles in the different electrospun materials.…”

Section: Resultsmentioning

confidence: 99%

Optical Gain in the Near Infrared by Light‐Emitting Electrospun Fibers

Morello

Moffa

Girardo

et al. 2014

Adv Funct Materials

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The potential integration of polymer nanofibers in photonic devices and circuits is a major driver for research on their waveguiding and optical gain properties. Emission in the near‐infrared is especially important in this framework in view of the realization of nanofiber‐based optical amplifiers. Here, the optical gain properties of electrospun fibers embedding near‐infrared light‐emitting molecules are investigated. Upon pulsed optical pumping, line narrowing typical of amplified spontaneous emission is observed, with gain of 5.5 cm−1 and threshold fluence down to 0.25 mJ cm−2. Importantly, the stimulated emission characteristics are strongly dependent on individual fiber characteristics and on the mutual alignment of nanofibers in arrays, thus being tailorable through the fiber architecture and assembling. These results open interesting perspectives for the exploitation of electrospun fibers as active components in the near‐infrared range.

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Section: Resultsmentioning

confidence: 99%

Optical Gain in the Near Infrared by Light‐Emitting Electrospun Fibers

Morello

Moffa

Girardo

et al. 2014

Adv Funct Materials

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“…Such structures provide an elegant way of tuning the wavelength of the output emission by altering the supported resonance frequency through control of the grating dimensions and/or the blend film thickness. [31][32][33][34][35] Fig. 4(a) shows a typical, peak intensity normalised, laser spectrum (659 nm peak) for a 250 nm thickness, 15 wt.…”

Section: Distributed Feedback Laser Characteristicsmentioning

confidence: 99%

“…22,34,35 F8BT also has a suitable lowest unoccupied molecular orbital (LUMO) for relative ease of electron injection and is a good electron transport material, 36 complementing the highest occupied molecular orbital (HOMO) alignment for efficient hole injection from standard anode materials combined with good hole transport properties that are typical of polythiophenes. 2 Another advantage of the RR-P3HT/F8BT blend system is that both components are readily commercially available, unlike a number of other polymers including Red F; a situation that will allow the system to be more widely utilised.…”

Section: Introductionmentioning

confidence: 99%

Efficient optical gain media comprising binary blends of poly(3-hexylthiophene) and poly(9,9-dioctylfluorene-co-benzothiadiazole)

Xia

Stavrinou

Bradley

et al. 2012

Journal of Applied Physics

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Articles you may be interested inImprovement in power conversion efficiency by blending of poly(3,4ethylenedioxythiophene):poly(styrenesulfonate) into poly(3-hexylthiophene):phenyl-C61-butyric acid methyl ester active layer Appl. Phys. Lett. 100, 223901 (2012); 10.1063/1.4723571High-efficiency blue multilayer polymer light-emitting diode based on poly(9,9-dioctylfluorene) Efficient blue-green and white light-emitting electrochemical cells based on poly[9,9-bis(3,6-dioxaheptyl)fluorene-2,7-diyl]We report the results of a study of the optical gain properties of binary blend films of regioregular poly(3-hexylthiophene) (RR-P3HT) and poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT). Efficient optical gain is observed in the 10-20 wt. % RR-P3HT composition range and can be tuned to the $650 nm window utilised for polymer optical fibre data-communications, with maximum gain $50 cm À1 . At higher P3HT fractions, gain thresholds increase substantially, consistent with the observed concomitant improvement in photocharge generation. Distributed feed back lasers with one-dimensional gratings exhibit pump pulse thresholds as low as 8 nJ (26 lJ cm À2 , 2.17 kW cm À2 ), lower than many other polymer-based gain media in this wavelength range. They also provide relatively high slope efficiencies >2%. The confluence of efficient optical gain with electronic properties that are conducive to charge carrier injection and transport is relatively novel and is expected to be a necessary requirement for the achievement of electrically pumped lasing. V C 2012 American Institute of Physics. [http://dx.

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“…Detection occurs when the high electron affinity nitroaromatic analytes bind to the polymer surface introducing nonradiative deactivation pathways 2 that quench the fluorescence by an electron transfer mechanism. CPs have already been demonstrated to exhibit strong optical amplification 7,8 and are highly promising laser materials. [9][10][11] Rose et al 5 have shown that microring lasers based on a poly͑pphenylene vinylene͒ derivative can have enhanced sensitivity for the detection of explosive vapors when operated close to threshold.…”

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confidence: 99%

Chemosensing of 1,4-dinitrobenzene using bisfluorene dendrimer distributed feedback lasers

Richardson

Barcena

Turnbull

et al. 2009

Applied Physics Letters

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Two-dimensional distributed feedback lasers using a broadband, red polyfluorene gain mediumWe report the trace vapor detection of the molecule 1,4-dinitrobenzene, a model analyte for the explosive substance 2,4,6-trinitrotoluene, via fluoresence quenching of a first generation conjugated dendrimer containing a 2 , 2Ј-bis͓9,9-di-n-hexylfluorene͔ core. We show that much greater sensitivity can be obtained by using the material as a surface emitting distributed feedback laser. We find that the slope efficiency of the laser is a convenient and sensitive indicator of the presence of the analyte. The slope efficiency decreases by a factor 50 in the presence of 1,4-dinitrobenzene.

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Operating characteristics of a traveling-wave semiconducting polymer optical amplifier

Cited by 16 publications

References 16 publications

Optical Gain in the Near Infrared by Light‐Emitting Electrospun Fibers

Optical Gain in the Near Infrared by Light‐Emitting Electrospun Fibers

Efficient optical gain media comprising binary blends of poly(3-hexylthiophene) and poly(9,9-dioctylfluorene-co-benzothiadiazole)

Chemosensing of 1,4-dinitrobenzene using bisfluorene dendrimer distributed feedback lasers

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