Optical uniform/gradient waveguide sensor structure - characterization

Karasiński, Paweł

doi:10.2478/s11772-010-0069-9

Cited by 16 publications

(5 citation statements)

References 25 publications

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“…33 Ion-exchanged glasses are routinely used for glass strengthening 34 and gradient waveguide fabrication. 35,36 The ion-exchange method leads to a gradient silver ion concentration and is used for surface modification of the glass. The high silver ion concentration in the close vicinity of the glass surface can play an important role for sensor applications.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Recently, the structure of silicate glass could be identified on the atomic scale . Ion-exchanged glasses are routinely used for glass strengthening and gradient waveguide fabrication. , The ion-exchange method leads to a gradient silver ion concentration and is used for surface modification of the glass. The high silver ion concentration in the close vicinity of the glass surface can play an important role for sensor applications. , Recently, we demonstrated that low concentrations of biomolecules can be detected on silver ion-exchanged glasses using surface-enhanced Raman scattering (SERS) …”

Section: Introductionmentioning

confidence: 99%

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Formation Mechanism of Silver Nanoparticles Stabilized in Glassy Matrices

et al. 2012

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In any given matrix control over the final particle size distribution requires a constitutive understanding of the mechanisms and kinetics of the particle evolution. In this contribution we report on the formation mechanism of silver nanoparticles embedded in a soda-lime silicate glass matrix. For the silver ion-exchanged glass it is shown that at temperatures below 410 °C only molecular clusters (diameter <1 nm) are forming which are most likely silver dimers. These clusters grow to nanoparticles (diameter >1 nm) by annealing above this threshold temperature of 410 °C. It is evidenced that the growth and thus the final silver nanoparticle size are determined by matrix-assisted reduction mechanisms. As a consequence, particle growth proceeds after the initial formation of stable clusters by addition of silver monomers which diffuse from the glass matrix. This is in contrast to the widely accepted concept of particle growth in metal-glass systems, in which it is assumed that the nanoparticle formation is predominantly governed by Ostwald ripening processes.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Formation Mechanism of Silver Nanoparticles Stabilized in Glassy Matrices

et al. 2012

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“…/ is the surface sensitivity, n eff is an effective refractive index, n c is a RI of the ambient and w s is a thickness of the sensitive film. High sensitivities are achievable for single modal or bimodal uniform waveguides having high refractive index [11][12][13][14][15][16] . However thicknesses of single or bimodal waveguides which have high refractive index contrast are small, being of the order of wavelength fraction.…”

Section: Introductionmentioning

confidence: 99%

“…Changes of the measurand are transformed into changes of a real part of waveguide modes effective indexes. These changes can be measured using grating couplers 7,8 or planar waveguide interferometers [9][10][11] . The key parameters of PEWS are a homogeneous sensitivity and a surface sensitivity, defined as a derivatives of effective refractive indexes in respect to parameters of a cover: the RI of the ambient and a thickness of the sensitive film.…”

Section: Introductionmentioning

confidence: 99%

Design and characterization of composite planar polarimetric interferometer

et al. 2014

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This paper presents the design and theoretical characterization of a composite uniform-gradient planar waveguide polarimetric interferometer. Presented structure is composed of an Ag + ↔Na + ion-exchange based waveguide formed in Borosilicate 33 glass substrate and a uniform, sol-gel based, silica-titania film. Characteristics of homogeneous sensitivity difference for TE 0 -TM 0 , TE 0 -TE 1 and TM 0 -TM 1 modes in function of the uniform film refractive index and the gradient waveguide refractive index profile are given. Because thermal annealing is an inseparable part of the sol-gel process, the gradient index waveguide is subjected to a rediffusion process. The original refractive index profile is flattened. It was shown that a presence of the gradient waveguide increases sensitivity differences over values which can be obtained for single layer uniform silica-titania waveguides. Moreover, it was shown that a range of uniform film thickness values, for which sensitivity difference of the composite structure is maximized, is downshifted to a range which can be much easier obtained with a sol-gel process.Waveguides, planar; Optical sensing and sensors; Multilayer design

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“…Optical transfer matrix methods are very useful in the analy− sis of the multilayer optical structures [26][27][28][29][30]. In the theo− retical analysis of a solar cell was used the optical transfer matrix 2×2 method [26,31].…”

Section: Calculation Routinementioning

confidence: 99%

Optical optimization of organic solar cell with bulk heterojunction

Gondek

2014

Opto-Electronics Review

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The work is devoted to the optimization of layer thickness in an organic photovoltaic cell. It presents the applied calculation method which is based on the optical transfer matrix 2×2 formalism. We present the influence of thickness of a PEDOT:PSS layer and of an active layer on the normalized modulus squared of optical electric fields distribution inside devices and on the distributions of exciton generation rate. We present the relationship between optimal thicknesses of the PEDOT:PSS layer and the active layer. We also present the influence of antireflection coating on distributions of optical electrical fields, as well as the distributions of exciton generation rate. Perpendicular and oblique illumination of the photovoltaic structure is discussed.

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Optical uniform/gradient waveguide sensor structure - characterization

Cited by 16 publications

References 25 publications

Formation Mechanism of Silver Nanoparticles Stabilized in Glassy Matrices

Formation Mechanism of Silver Nanoparticles Stabilized in Glassy Matrices

Design and characterization of composite planar polarimetric interferometer

Optical optimization of organic solar cell with bulk heterojunction

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