It is an irreversible process, which is delirious to laser action in doped polymer hosts. Photobleaching of cresyl violet in polymethyl methacrylate. There has been phenomenal effort synthesizing new lowband gap polymer holeconductors which absorb into the nearinfrared nir, leading to 10% efficient allorganic solar cells. As cladding material, a guesthost polymer system is employed comprising the nonlinear optical dye disperse red 1 dr1 doped in a poly. Nearinfrared nir fluorescence sensing is desirable for in vivo biological measurements, but the method is currently limited by the availability of nir fluorescent markers as well as by their poor performance, such as selfaggregation and dim fluorescence, in a physiological environment. Organic dye doped polymer films are use d for 1 optical amplification, 2 rewritable optical data storag e, 3 optical i nformation stor age, 4 spatial l ight modulation, 5. Material gain concentration quenching in organic dyedoped. Improvement of luminescent solar concentrators using. Although in the above example, the doping of solid polymer pieces with a fluorescent dye which can be extended to many other polymers as we have. Nonlinear effetcts in dyedoped polymer optical fibres for.
Copolymer and dyedoped polymer fiber and fiber preform. When the dyedoped microspheres are embedded in polymer and subjected to planar shock compression, the. Firstly, uv light induced photochromism of a synthesized dye daecho in solution and in the solid state is investigated to understand the relationship between their structure and optical properties, especially. The scattering losses due to nontir angular spectral components in a dyedoped dielectric waveguide are expected to be lower than those in a nonluminescent waveguide because of isotropic emission by lumi. Solidstate dye lasers are organic tunable lasers that use a variety of organic gain media, such as laser dyedoped polymers ddp, laser dyedoped ormosil ddo, and laser dyedoped polymernanoparticle ddpn matrices ddo and ddpn gain media are subsets of a larger class of organicinorganic hybrid materials used as laser matrices. Nonlinear characterization of mercurochrome dye for. The electrooptical properties of the liquid crystal device dependent on rm and dye composition were investigated. Spectroscopic properties of azodye doped pmma films studied by multiphoton absorption lisong yang 1,2, guiying wang 1, jiangang wang 1, guangbin wang 1, zhizhan xu 1 1 laboratory for high intensity optics, shanghai institute of optics and fine mechanics, chinese academy of sciences, shanghai 201800, p.
The rhbdoped polymer nanofibers were fabricated by a direct drawing method 16 from polymer solutions with. The first probe was dyedoped silica microspheres, which were found to have 3. The fiber is observed to bend when light is launched offaxis. We can determine the forster radius, r0, using the equation where n is the index of refraction 1. The conversion efficiency of 43% and the tunable range of 63 nm have been reached with the use of polymethine dye in a polyurethane matrix. High contrast switching of distributedfeedback lasing in. A unique dye, ir165, was found to act as both a heater and a thermometer. The concentration of methyl red in polystrene and bcp in styrene acrylonitrile was varied from 0. Joshi 2 1school of mechanical and building sciences.
Osa tunable solidstate lasers incorporating dyedoped. Solventenhanced dye diffusion in polymer thisfilms for. To address this issue, this paper describes a nir fluorescent polymer dot pdot that emits at 777 nm. Whispering gallery mode emission from dyedoped polymer. Vertically emitting, dyedoped polymer laser in the green. Polarization and gain phenomena in dyedoped polymer microlasers.
Nonlinear effetcts in dye doped polymer optical fibres for optical communication submitted by emmanuel lemoine on mon, 06022014 18. The first report of the observation of photobleaching in polymerhost. The picture of pure pva and pva doped with red bs dye thin films are presented in fig. Synthesis and investigation of phenol red dye doped. We report on what we believe is the first demonstration of an optically activated cantilever due to photomechanical effects in a dyedoped polymer optical.
We observed both transverse electric te and transverse magnetic tm wgep that have room temperature splitting values of 190 mev and 125 mev, respectively, that are on the same order as those measured in systems of jaggregates embedded in micro cavities. Chemical doping involves exposing a polymer such as. Osa optically activated cantilever using photomechanical. Here we report a machzehnder interferometer mzi waveguide with photochromic dyedoped polymer sensing films for uv light detection.
Such explanation can be supported by the fact that the blue emission of coumarin is suppressed and only sharp emission of pdmsimpsi dominates. Removal of doped polymethylmetacrylate from tungsten and. Photophysics and dynamics of dyedoped conjugated polymer nanoparticles by timeresolved and fluorescence correlation spectroscopy. The dye doped polymer films were prepared as follows. Ji5 1school of electrical and electronic engineering, nanyang technological university, nanyang avenue, singapore 639798, singapore. Additionally, bright and fullcolor magnetic nanoparticles were obtained by mixing different colored magnetic nanoparticles that were prepared by copolymerization of 2acetoacetoxy ethyl methacrylate and dye monomers. Strong coupling between excitons in jaggregates and. Dyedoped pqpmma phase holographic materials for dfb. Control of triboelectric charges on common polymers by. Dyedoped polymer dispersed liquid crystal films for. The repeating group is known as monomer or single unit. We apply standard emission and absorption techniques in conjunction with the sideillumination fluorescence sif technique to characterize both copolymer and dyedoped polymer fibers and fiber preforms. Spatial angle dependent lasing from a dyedoped two.
From their studies it was shown that the bleached dye molecular fragments did not absorb in the visible portion of the spectrum. Preparation of singledyedoped selfreferenced ratiometric nanoprobe ssrn the amphiphilic polymer co720ma 10 mg and hbpy 1 mg were dissolved in 1 ml thf and well stirred. Polymer photonic crystal dye lasers as optofluidic cell. Then, the above mixture was quickly injected into 10 ml of water by means of vigorous sonication. For the first time, tunable lasing from a dye laser with an active polymer medium has been obtained using 1. A strip of a liquid crystal elastomer doped with a near. James, tunable solidstate lasers incorporating dyedoped, polymer nanoparticle gain media, opt. Comparative study of nanoslot silicon waveguides covered by. The polymer network formed by rm cotributed to the random orientation. In this work, we have developed a new method for measuring the tpa crosssection of a dye in a transparent polymer thin. For a bragg grating having a periodicity and depth of 360 2 nm and 78 5 nm, respectively, a coumarin 540 polymer laser operates at 535.
Spectral characteristics of single and coupled microresonator lasers comprising a replicamolded bragg grating and dyedoped polymer j. Crosslinked, dye doped pva fibers are utilized to sense the ethanol concentration in ethanolwater mixtures and actuation mechanisms are evaluated by comparison to theoretical spectra. Luminescent solar concentrators lscs incorporating a dye doped thin film coating can be used as a waveguide to absorb and redirect light to coupled solar cells. Pdf the optical properties of the pure polymer film and polymer films doped with phenol red dye at different concentrations were investigated. Known weight of the dye is dissolved in this mixture. However, organic light absorbers have relatively narrow bandwidths, making it challenging to obtain panchromatic absorption in a single organic semiconductor.
Spectroscopic properties of azodye doped pmma films. Photobleaching is the lightinducedfragmentation of the active laser dye molecules into components that no longer absorb at the pump wavelength. Based on the change of the absorption for rhb dye incorporation into different transparent polymer hosts, heat sensor testing has been investigated via recording. Highly reproducible co copolymer and dyedoped polymer fiber fabrication is of great interest for many nonlinear optical applications. Polymers free fulltext whitelight emission of dyedoped. Other methods to pattern the color emission from polymers make use of this fact, for example inkjet printing of a dye solution on a substrate previously coated with polymer 7, or photobleaching of a dye 8. Whitelight emission of dyedoped polymer submicronic fibers. Fabrication of dye doped polymer composite and specific resistance aditya bhagat 1, rutwesh shirbhate 1, fastin telare 1, mayank pandey 2, moumita khutia 2, pankaj tambe 1, kalim deshmukh 3, girish m. As a result, dyedoped lc droplets act as light scattering centers, and pdlc. My system features pfbt nanoparticles and a class of merocyanine dyes. Fabrication of dye doped polymer composite and specific. High efficiency lasing of a dyedoped polymer laser with 1. The demonstration of high q resonances within nfes polymer microfibers is a critical step toward simple, cost effective, highvolume fabrication of wgm. Conjugated polymer nanoparticles cpns harvest energy from photons and transfer it efficiently to dye molecules in their proximity.
A negative lc rta93000100, rm and black dye corresponding to it were used in our experiment. We report on what we believe is the first demonstration of an optically activated cantilever due to photomechanical effects in a dyedoped polymer optical fiber. Conductive polymers can be doped by adding chemical reactants to oxidize, or sometimes reduce, the system so that electrons are pushed into the conducting orbitals within the already potentially conducting system. Picosecond timeresolved studies of multiple energy. Fabrication of planar optical waveguides by electrical. Electrospun polymer fibers represent an interesting type of such microscopic structures. Unlimited viewing of the articlechapter pdf and any associated supplements and figures. This produced a polymer film thickness of 700 a as measured by stylus profilometry. Solutionmediated cladding doping of commercial polymer. Photobleaching and its severity in dye lasers were first studied by ippen et ap3. Pictured in figure 4 are various dyedoped polymer samples. High power and highgain organic dyedoped polymer optical fiber.
Analysis of dyedoped and polymer blended cpns shows that the doped cpns exhibit bright, redshifted emission, owing to the highly efficient energy transfer from the host polymer pfbt to the respective dopants the fluorescent dye perylene red in dyedoped cpns, and the polymer mehppv in. A mode filter was fabricated using bcp doped san films and methyl red doped polystyrene films were coated over them. Pbd, or copolymer was spin coated onto the ito substrate from a 28 mgml solution total solids in 1,2dichloroethane at 3500 to 4000 rpm in a nitrogen glove box. Fullcolor magnetic nanoparticles based on holmiumdoped. The journal of physical chemistry c 20, 117 50, 2675026759. The linear absorption spectrum curve a is measured by using a scanning spectrophotometer uv3101pc from shimadzu with a 3nm spectral. Wavelengthconverted waveguiding in dyedoped polymer. The material gain in these dyedoped polymer thin films was. Guided transportation, turning in locomotion, and autonomous motion. Whitelight emission of dyedoped polymer submicronic fibers produced by electrospinning. Pdf abcd analysis of dye doped polymers for photonic. Improvement of luminescent solar concentrators using liquid crystal polymer abstract.
Synthesis of dye doped polymer films methylmethacrylate mma is used as the monomer for the preparation of the dye doped polymer ddp films. Novel lanthanidepolymer complexes for dyefree dual modal probes for mri and fluorescence imaging. This was then cut into small pieces for spectral measurement. Nearinfrared fluorescent dyedoped semiconducting polymer. Spatial angle dependent lasing from a dyedoped twodimensional hexagonal photonic crystal made of holographic polymerdispersed liquid crystals d. An optically activated cantilever using photomechanical. Effect of dye concentration on the optical properties of redbs dye. The irdye concentration was chosen to obtain a linear absorption coef. The absorption and fluorescence spectra of the dye doped grating film are shown in fig. We have measured the tpa crosssection of a series of twophoton materials 1a3a 12 in pmma. Appropriate amount of poly methylmethacrylate pmma polymer was dissolved in a mixture of chloroform solvent and 5% of the vo.
Pdf optical properties of rhodamine b dye doped in. Dyedoped polymers have been studied in detail from the point of view of. The emitted lasing wavelength is expected to be between 540 nm to 600 nm. Ultrafast temperature jump study of energy transfer in dye.
A phenol red dye solution with certain concentration was prepared by dissolving appropriate amount of dye powder in a mixture of chloroform and 5% of the volume of methanol. Solution doping of commercial polymethyl methacrylate pmma polymer optical fibers. Fabrication and characterization of dyedoped polymeric. Using perylenedoped polymer nanotubes as fluorescence. The properties of ir165 containing polymers such as stability, absorption coefficient, saturation intensity, and absorption recovery time, under the intense optical pumping conditions required to obtain large and uniform temperature jumps are experimentally determined and. Pdf synthesis and investigation of phenol red dye doped. The displacement angle monotonically increases as a function of the distance between the illumination point and the fiber axis and is consistent with differential light.
Crosslinked, dyedoped pva fibers are utilized to sense the ethanol concentration in ethanolwater mixtures and actuation mechanisms are evaluated by comparison to theoretical spectra. The pure and dye doped polymer films were prepared using the casting technique. Eden department of electrical and computer engineering, university of illinois, urbana, illinois 61801, usa. Photobleaching of dyedoped polymers using lasers or uv light is another technique used commonly for the fabrication of planar waveguides.
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