Optical Dispersion Characteristics of Polyvinyl Alcohol Reinforced with a Nanoceramic Filler

Polymer films with high refractive index are suitable for a wide range of applications, such as optical fibers, lens and other components for optoelectronic devices. In this work, polyvinyl alcohol films were prepared from aqueous solutions, which were homogenized by ultrasonication. In order to increase the refractive index, the polymer was reinforced with barium titanate nanoparticles, which are previously ultrasonicated for an adequate dispersion inside the host polymer. The dispersion of the refractive index in visible domain was analyzed as a function of filler percent introduced in polymer, showing that an increase in sample s polarizability determined an increase in the refractive index values. The reinforcement caused a decrease of Abbe number indicating a higher light dispersion in the samples. Optical dispersion parameters were extracted from dispersion curves, revealing a reduction of band gap from 3.448 eV for pure polymer to 2.605 eV for the sample containing 2% barium titanate. Doping with the ceramic nanofiller determined a increase in optical conductivity and real part of dielectric constant as a result of appearance of new level states in the band gap. The increase of third order nonlinear optical susceptibility and nonlinear refractive index indicates the suitability of the analyzed nanocomposites for nonlinear optics applications.

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Preparation and Characterization of Polyvinylidene Fluoride/ZrO2-TiO2 Optical Film with Wide Band Gap and High Refractive Index

Journal of Inorganic Materials ◽

10.3724/sp.j.1077.2013.12747 ◽

2013 ◽

Vol 28 (6) ◽

pp. 671-676 ◽

Cited By ~ 4

Author(s):

Yu-Qing ZHANG ◽

Li-Li ZHAO ◽

Shi-Long XU ◽

Chao ZHANG ◽

Xiao-Ying CHEN ◽

...

Keyword(s):

Refractive Index ◽

Band Gap ◽

Polyvinylidene Fluoride ◽

Wide Band ◽

High Refractive Index ◽

Wide Band Gap ◽

Optical Film

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Cellulose derivative/barium titanate composites with high refractive index, conductivity and energy density

Cellulose ◽

10.1007/s10570-021-04343-2 ◽

2022 ◽

Author(s):

Andreea Irina Barzic ◽

Marius Soroceanu ◽

Razvan Rotaru ◽

Florica Doroftei ◽

Mihai Asandulesa ◽

...

Keyword(s):

Refractive Index ◽

Energy Density ◽

Barium Titanate ◽

High Refractive Index ◽

Cellulose Derivative

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Coated High-Refractive-Index Barium Titanate Glass Microspheres for Optically Trapped Microsphere Super-Resolution Microscopy: A Simulation Study

Photonics ◽

10.3390/photonics7040084 ◽

2020 ◽

Vol 7 (4) ◽

pp. 84

Author(s):

Xi Liu ◽

Song Hu ◽

Yan Tang

Keyword(s):

Refractive Index ◽

Barium Titanate ◽

Optical Trapping ◽

Super Resolution ◽

High Refractive Index ◽

Trapping Efficiency ◽

Single Beam ◽

Imaging Performance ◽

Super Resolution Microscopy ◽

Optically Trapped

As water is normally used as the immersion medium in optically trapped microsphere microscopy, the high-refractive-index barium titanate glass (BTG) microsphere shows a better imaging performance than the low-index polystyrene (PS) or melamine formaldehyde (MF) microsphere, but it is difficult to be trapped by single-beam optical trapping due to its overly high refractive index. In this study, coated BTG microspheres with a PS coating have been computationally explored for the combination of optical trapping with microsphere-assisted microscopy. The PS coating thickness affects both the optical trapping efficiency and photonic nanojet (PNJ) property of the coated BTG sphere. Compared to the uncoated BTG sphere, the coated BTG sphere with a proper PS coating thickness has a highly improved trapping efficiency which enables single-beam optical trapping, and a better PNJ with a higher optical intensity Imax and a narrower full width at half maximum (FWHM) corresponding to better imaging performance. These coated BTG spheres also have an advantage in trapping efficiency and imaging performance over conventional PS and MF spheres. The coated BTG microsphere is highly desirable for optically trapped microsphere super-resolution microscopy and potentially beneficial to other research areas, such as nanoparticle detection.

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Generation of lossy mode resonances by deposition of high-refractive-index coatings on uncladded multimode optical fibers

Journal of Optics ◽

10.1088/2040-8978/12/9/095503 ◽

2010 ◽

Vol 12 (9) ◽

pp. 095503 ◽

Cited By ~ 58

Author(s):

I Del Villar ◽

C R Zamarreño ◽

P Sanchez ◽

M Hernaez ◽

C F Valdivielso ◽

...

Keyword(s):

Refractive Index ◽

Optical Fibers ◽

High Refractive Index

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Comparative study of solution concentration variations for polymer optical fibers sensor

Malaysian Journal of Fundamental and Applied Sciences ◽

10.11113/mjfas.v16n2.1451 ◽

2020 ◽

Vol 16 (2) ◽

pp. 140-144

Author(s):

Hazura Haroon ◽

Muhamad Naeem Mohd Nazri ◽

Siti Khadijah Idris ◽

Hanim Abdul Razak ◽

Anis Suhaila Mohd Zain ◽

...

Keyword(s):

Refractive Index ◽

Comparative Study ◽

Output Power ◽

Optical Fibers ◽

Refractive Index Change ◽

Solution Concentration ◽

High Refractive Index ◽

Fiber Optic Sensors ◽

Polymer Optical Fibers ◽

Set Up

In this paper, we report a comparative study of fiber optic sensors for the application of aqueous solutions concentration monitoring. A simple, economical, and efficient set-up for liquid concentration measurement system was developed using polymer optical fibers (POFs). Cornstarch, sucrose, and salt solutions with different concentrations were tested, and the output power and the refractive index obtained were compared. The sensitivity of the sensor is found ranging from 0.938 μW/ RIU to 96.9 μW/RIU in term of refractive index change and 0.04298 μW/molL-1 to 0.097 μW/molL-1 in terms of concentration. It has been found that the concentration is proportionally related to its refractive index where high refractive index will experience greater loss since the light rays tend to be refracted out of the fiber instead of being internally reflected. The experimental results also show that as the solution’s concentration increases, the output power decreases.

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One-step vapor-phase synthesis of transparent high refractive index sulfur-containing polymers

Science Advances ◽

10.1126/sciadv.abb5320 ◽

2020 ◽

Vol 6 (28) ◽

pp. eabb5320 ◽

Cited By ~ 4

Author(s):

Do Heung Kim ◽

Wontae Jang ◽

Keonwoo Choi ◽

Ji Sung Choi ◽

Jeffrey Pyun ◽

...

Keyword(s):

Refractive Index ◽

Vapor Phase ◽

Elemental Sulfur ◽

Chemical Vapor ◽

Deposition Process ◽

High Refractive Index ◽

Visible Range ◽

Wide Range ◽

One Step ◽

Vapor Phase Synthesis

High refractive index polymers (HRIPs) have recently emerged as an important class of materials for use in a variety of optoelectronic devices including image sensors, lithography, and light-emitting diodes. However, achieving polymers having refractive index exceeding 1.8 while maintaining full transparency in the visible range still remains formidably challenging. Here, we present a unique one-step vapor-phase process, termed sulfur chemical vapor deposition, to generate highly stable, ultrahigh refractive index (n > 1.9) polymers directly from elemental sulfur. The deposition process involved vapor-phase radical polymerization between elemental sulfur and vinyl monomers to provide polymer films with controlled thickness and sulfur content, along with the refractive index as high as 1.91. Notably, the HRIP thin film showed unprecedented optical transparency throughout the visible range, attributed to the absence of long polysulfide segments within the polymer, which will serve as a key component in a wide range of optical devices.

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Interfacing optical fibers and high refractive index contrast waveguide circuits using diffractive grating couplers

10.1117/12.808909 ◽

2009 ◽

Cited By ~ 2

Author(s):

G. Roelkens ◽

D. Taillaert ◽

F. Van Laere ◽

D. Vermeulen ◽

J. Schrauwen ◽

...

Keyword(s):

Refractive Index ◽

Optical Fibers ◽

High Refractive Index ◽

Grating Couplers ◽

Refractive Index Contrast ◽

Index Contrast

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TEMPERATURE-TUNED BAND GAP ENERGY AND OSCILLATOR PARAMETERS OF TlInSeS LAYERED SINGLE CRYSTALS

International Journal of Modern Physics B ◽

10.1142/s021797920804867x ◽

2008 ◽

Vol 22 (22) ◽

pp. 3931-3939 ◽

Cited By ~ 7

Author(s):

N. M. GASANLY ◽

I. GULER

Keyword(s):

Refractive Index ◽

Band Gap ◽

Band Gap Energy ◽

Rate Of Change ◽

Dispersion Parameters ◽

Absorption Data ◽

Gap Energy ◽

Single Oscillator Model ◽

Layered Crystals ◽

Indirect Band Gap

The parameters of monoclinic unit cell of TlInSeS layered crystals were determined from X-ray powder diffraction study. The optical properties of TlInSeS have been investigated by means of transmission and reflection measurements in the wavelength range of 500–1100 nm. The optical indirect transitions with band gap energy of 2.05 eV and direct transitions with band gap energy of 2.21 eV were found by means of the analysis of the absorption data at room temperature. Transmission measurements carried out in the temperature range of 10–300 K revealed that the rate of change of the indirect band gap with temperature is γ = -4.7 × 10-4 eV/K. The dispersion of the refractive index is discussed in terms of the single oscillator model. The refractive index dispersion parameters: oscillator wavelength and strength were found to be 2.78 × 10-7 m and 1.21 × 1014 m -2, respectively.

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Оптические свойства пленок ниобата бария стронция SBN61

Физика твердого тела ◽

10.21883/ftt.2018.05.45801.228 ◽

2018 ◽

Vol 60 (5) ◽

pp. 993

Author(s):

В.Б. Широков ◽

А.В. Павленко ◽

Д.В. Стрюков ◽

Ю.В. Ревинский

Keyword(s):

Refractive Index ◽

Single Crystal ◽

Band Gap ◽

Optical Transmission ◽

Visible Range ◽

Transmission Spectra ◽

X Ray Diffraction ◽

Dispersion Parameters ◽

X Ray ◽

Optical Transmission Spectra

AbstractHeteroepitaxial Sr_0.61Ba_0.39Nb_2O_6 films have been formed on MgO(001) substrates by RF deposition in an oxygen atmosphere. The film orientation with respect to the substrate is investigated using X-ray diffraction. The permittivity dispersion parameters in the visible range are determined by measuring optical transmission spectra. The films are found to have a wider band gap and a smaller refractive index as compared with the single-crystal material.

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