Abstract:The resonant energy transfer enhancement from a plasmonic random laser has been investigated by means of a dye-covered PVA film embedded with silver nanoplates with different sizes and morphologies.
“…According to the results, we understand that the bird feather consists of keratin, one structural protein, which tolerates less exciting energy than chitin, the main material of butterfly wings 34 . However, the threshold of this framework is competitive with the metallic nanoparticles embedded in polymers 21 . Figure 5 ( a ) Emission spectra of S0 with 2.3 μJ (green) and 4.9 μJ (red) pump energy for different exposure times.…”
Section: Resultsmentioning
confidence: 99%
“…Weng et al studied that adding a patterned sapphire substrate efficiently reduced the lasing threshold from 2.55 to 0.15 μJ in CH 3 NH 3 PbBr 3 perovskite thin films 18 . Hsiao et al tuned the resonant energy transfer by different sizes of silver nanoparticles, and the threshold of random lasers from the dye-doped polymer is manipulated from 15.75 to 1.12 μJ 21 . Wan et al reported plasmonic titanium nitride (TiN) nanoparticles enhanced low-threshold random lasing from dye-doped nematic liquid crystals 22 , the laser threshold decreases from 6.13 to 2.37 μJ/pulse when the number density of TiN nanoparticles increases from 5.613 × 10 10 /ml to 5.314 × 10 11 /ml.…”
Random lasers had been made by some biomaterials as light scattering materials, but natural photonic crystals have been rarely reported as scattering materials. Here we demonstrate the ability of natural photonic crystals to drive laser actions by sandwiched the feathers of the Turquoise-Fronted Amazon parrot and dye between two plastic films. Parrot feathers comprise abundant photonic crystals, and different color feathers compose of different ratios of the photonic crystal, which directly affect the feather reflectance. In this study, the multi-reflection scattering that occurred at the interface between the photonic crystal and gain media efficiently reduce the threshold; therefore, the more photonic crystal constitutes in the feathers; the lower threshold can be obtained. The random lasers can be easily made by the integration of bird feather photonic crystals and dye with a simple and sustainable manufacturing approach.
“…According to the results, we understand that the bird feather consists of keratin, one structural protein, which tolerates less exciting energy than chitin, the main material of butterfly wings 34 . However, the threshold of this framework is competitive with the metallic nanoparticles embedded in polymers 21 . Figure 5 ( a ) Emission spectra of S0 with 2.3 μJ (green) and 4.9 μJ (red) pump energy for different exposure times.…”
Section: Resultsmentioning
confidence: 99%
“…Weng et al studied that adding a patterned sapphire substrate efficiently reduced the lasing threshold from 2.55 to 0.15 μJ in CH 3 NH 3 PbBr 3 perovskite thin films 18 . Hsiao et al tuned the resonant energy transfer by different sizes of silver nanoparticles, and the threshold of random lasers from the dye-doped polymer is manipulated from 15.75 to 1.12 μJ 21 . Wan et al reported plasmonic titanium nitride (TiN) nanoparticles enhanced low-threshold random lasing from dye-doped nematic liquid crystals 22 , the laser threshold decreases from 6.13 to 2.37 μJ/pulse when the number density of TiN nanoparticles increases from 5.613 × 10 10 /ml to 5.314 × 10 11 /ml.…”
Random lasers had been made by some biomaterials as light scattering materials, but natural photonic crystals have been rarely reported as scattering materials. Here we demonstrate the ability of natural photonic crystals to drive laser actions by sandwiched the feathers of the Turquoise-Fronted Amazon parrot and dye between two plastic films. Parrot feathers comprise abundant photonic crystals, and different color feathers compose of different ratios of the photonic crystal, which directly affect the feather reflectance. In this study, the multi-reflection scattering that occurred at the interface between the photonic crystal and gain media efficiently reduce the threshold; therefore, the more photonic crystal constitutes in the feathers; the lower threshold can be obtained. The random lasers can be easily made by the integration of bird feather photonic crystals and dye with a simple and sustainable manufacturing approach.
“…2 By means of their broad emission bandwidth, structural tunability and large stimulated emission cross section, organic laser dyes have played a vital role in the development of ultrafast lasers and have been recognized as promising gain media in emerging laser systems. To date, many commercially available laser dyes such as rhodamine 6G (R6G), pyrromethene 597 (PM597) and dichloromethane (DCM) 3 have been adopted as active media to produce random lasers (RLs) in cooperation with nanostructure materials such as liquid crystals, 4 TiO 2 , 5 polymers 6,7 and electro-spun fiber. 8 In contrast to conventional lasers with cavity mirrors, the generated photons of RLs can be efficiently trapped in a disordered nano-structure by recurrent light scattering to form a number of closed loops.…”
Amplified spontaneous emission and random lasing behavior are demonstrated from our synthesized donor–acceptor–donor dye-covered biocompatible silk fibroin (DC-SF) film and the DC-SF film with embedded silver nanoprisms, respectively.
“…Polymer composites not only limit their arms to sensors and energy generators, but they also govern breakthroughs in fields such as light-emitting diodes (LEDs), lasers, solar cells, field effect transistors, memory devices, and soft robots [12][13][14]. For instance, polymeric composite light emissive layers empower the efficiency and stability of the LEDs [15,16].…”
The Conducting of polymers belongs to the class of polymers exhibiting excellence in electrical performances because of their intrinsic delocalized π- electrons and their tunability ranges from semi-conductive to metallic conductive regime. Conducting polymers and their composites serve greater functionality in the application of strain and pressure sensors, especially in yielding a better figure of merits, such as improved sensitivity, sensing range, durability, and mechanical robustness. The electrospinning process allows the formation of micro to nano-dimensional fibers with solution-processing attributes and offers an exciting aspect ratio by forming ultra-long fibrous structures. This review comprehensively covers the fundamentals of conducting polymers, sensor fabrication, working modes, and recent trends in achieving the sensitivity, wide-sensing range, reduced hysteresis, and durability of thin film, porous, and nanofibrous sensors. Furthermore, nanofiber and textile-based sensory device importance and its growth towards futuristic wearable electronics in a technological era was systematically reviewed to overcome the existing challenges.
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