Polymeric multilayers for integration into photonic devices

Álvarez, Antonio García; Tito, J.; Vaello, M.B.; Velásquez, Pablo; Mallavia, Ricardo; Sánchez-López, Marı́a del Mar; Ávila, Susana Fernández de

doi:10.1016/s0040-6090(03)00348-1

Cited by 45 publications

(25 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Due to superior optical and mechanical properties of PVA films, like emulsifying, optical transparency, good adhesive properties, and formation of good oxygen resistant films, makes it a good choice for the fabrication of optical devices [8]. The wide range of PVA applications can be even more extended by incorporation of filler into PVA matrix, because well-dispersed filler may enhance various physical properties of the host polymer [9].…”

Section: Introductionmentioning

confidence: 99%

Optical and structural investigation of synthesized PVA/PbS nanocomposites

Abdullah

Tahir

Kadir

2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Polymer nanocomposite based on polyvinyl alcohol (PVA) and lead sulfide (PbS) in the average radius of (1.88-2.23) nm, have been synthesized using the chemical reduction rote and solution casting technique for different concentrations of PbS. The characterization of the polymer nanocomposite films were carried out using UVvisible spectroscopy, SEM, and XRD. The effect of various concentration of PbS NP on the optical properties of the composite has been studied to understand the optimum conditions for the synthesis process. The nanocomposite film shows high UV and visible light absorptions in the wavelength range of (200-500) nm, which correspond to the characteristics of the PbS NPs. The significant decreasing trend of the direct allowed band gap of the nanocomposite was observed upon increasing the Pb source concentration, from (6.27 eV) for pure PVA to (2.34 eV) for 0.04 M PbS concentration, which is much higher than the energy gap of bulk PbS value (0.41 eV). The calculated values of the static refractive index of Cauchy dispersion model were in the range of (1.09-1.20).X-ray diffraction analysis confirmed the cubic nanocrystalline PbS phase formation.

show abstract

Section: Introductionmentioning

confidence: 99%

Optical and structural investigation of synthesized PVA/PbS nanocomposites

Abdullah

Tahir

Kadir

2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…We follow the choice given in Ref. 2 where two polymers, ideal for their optical and mechanical properties, are used. The first polymer is the lower index water soluble poly(vinyl alcohol) (PVA) and the second polymer the higher index toluene soluble poly (N-vinycarbazole) (PVK).…”

Section: Bragg Depositionmentioning

confidence: 99%

<title>Corrugated grating on organic multilayer Bragg reflector</title>

2007

View full text Add to dashboard Cite

Polymeric multilayer Bragg structures are combined with diffractive gratings to produce artificial visual color effects. A particular effect is expected due to the angular reflection dependence of the multilayer Bragg structure and the dispersion caused by the grating. The combined effects can also be used to design particular filter functions and various resonant structures.The multilayer Bragg structure is fabricated by spin-coating of two different low-cost polymer materials in solution on a cleaned glass substrate. These polymers have a refractive index difference of about 0.15 and permit multilayer coatings without interlayer problems. Master gratings of different periods are realized by laser beam interference and replicated gratings are superimposed on the multilayer structure by soft embossing in a UV curing glue. The fabrication process requires only polymer materials. The obtained devices are stable and robust. Angular dependent reflection spectrums for the visible are measured. These results show that it is possible to obtain unexpected reflection effects. A rich variety of color spectra can be generated, which is not possible with a single grating. This can be explained by the coupling of transmission of grating orders and the Bragg reflection band. A simple model permits to explain some of the spectral vs angular dependence of reflected light.

show abstract

“…Although these lattices are very simple, their fabrication can be time and energy demanding. As a consequence, all-polymer DBRs are arising increasing attention due to their mechanical flexibility, low cost and rapid fabrication methods such as self-assembly [19][20][21], coextrusion [22] and spin-coating [23,24].…”

Section: Introductionmentioning

confidence: 99%

“…This process will also affect the matrix refractive index, which is obtained as the volume weighted average of the dielectric function of the components (effective medium) [48,53]. The opportunity to increase the dielectric contrast (with respect to well-known cases [13,23]) joined to the permeability promises might open new perspectives in the use of polymer nanocomposites in PC sensing applications. In this work, we report on the preparation of highly ordered multilayers made by CA and PS where the latter is doped with ZnO nanoparticles (NPs).…”

Section: Introductionmentioning

confidence: 99%

Hybrid ZnO:polystyrene nanocomposite for all‐polymer photonic crystals

Lova

Manfredi

Boarino

et al. 2014

Phys. Status Solidi C

View full text Add to dashboard Cite

We report on ZnO nanoparticles‐polystyrene (PS) nanocomposites (NC) engineered to modify PS matrix permeability and refractive index (n), and to fabricate 1D all‐polymer photonic crystals (PC) for sensing applications. The new NC can be easily processed from solutions to prepare high quality thin films by spin coating. ZnO nanoparticles (n = 1.98) have been synthetized by solvothermal route and grafted with a silane to reduce phase segregation in the PS matrix (n = 1.58). Such procedure led to an increase of the matrix refractive index of about 1%. By casting alternated layers of the NC and cellulose acetate (CA, n = 1.46), we fabricated free‐standing and flexible distributed Bragg reflectors (DBRs) of excellent optical quality. Preliminary results on the use of such DBRs as solvent vapor sensors are reported. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Polymeric multilayers for integration into photonic devices

Cited by 45 publications

References 9 publications

Optical and structural investigation of synthesized PVA/PbS nanocomposites

Optical and structural investigation of synthesized PVA/PbS nanocomposites

<title>Corrugated grating on organic multilayer Bragg reflector</title>

Hybrid ZnO:polystyrene nanocomposite for all‐polymer photonic crystals

Contact Info

Product

Resources

About