Low-loss, low-cost, high refractive index machinable ceramic for THz optical components

2017 ◽  
Author(s):  
Andreas K. Klein ◽  
Jonathan M. Hammler ◽  
Dagou Zeze ◽  
Claudio Balocco ◽  
Andrew J. Gallant
Keyword(s):  
Refractive Index ◽  
Low Cost ◽  
High Refractive Index ◽  
Low Loss ◽  
Optical Components ◽  
Machinable Ceramic

scholarly journals Scalable High Refractive Index polystyrene-sulfur nanocomposites via in situ inverse vulcanization

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Vijay S. Wadi ◽  
Kishore K. Jena ◽  
Kevin Halique ◽  
Brigita Rožič ◽  
Luka Cmok ◽  
...  
Keyword(s):  
Refractive Index ◽  
Low Cost ◽  
High Refractive Index ◽  
Extrusion Process ◽  
Melt Processing ◽  
Process Formation ◽  
Polystyrene Matrix ◽  
One Step ◽  
Extrusion Method

Abstract In this work, we demostrate the preparation of low cost High Refractive Index polystyrene-sulfur nanocomposites in one step by combining inverse vulcanization and melt extrusion method. Poly(sulfur-1,3-diisopropenylbenzene) (PS-SD) copolymer nanoparticles (5 to 10 wt%) were generated in the polystyrene matrix via in situ inverse vulcanization reaction during extrusion process. Formation of SD copolymer was confirmed by FTIR and Raman spectroscopy. SEM and TEM further confirms the presence of homogeneously dispersed SD nanoparticles in the size range of 5 nm. Thermal and mechanical properties of these nanocomposites are comparable with the pristine polystyrene. The transparent nanocomposites exhibits High Refractive Index n = 1.673 at 402.9 nm and Abbe’y number ~ 30 at 10 wt% of sulfur loading. The nanocomposites can be easily processed into mold, films and thin films by melt processing as well as solution casting techniques. Moreover, this one step preparation method is scalable and can be extend to the other polymers.

scholarly journals Polymer Waveguide Coupled Surface Plasmon Refractive Index Sensor: A Theoretical Study

2020 ◽  
Vol 10 (4) ◽  
pp. 353-363
Author(s):  
Lanting Ji ◽  
Shuqing Yang ◽  
Rongna Shi ◽  
Yujie Fu ◽  
Juan Su ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon ◽  
Low Cost ◽  
High Refractive Index ◽  
Waveguide Layer ◽  
Polymer Materials ◽  
Refractive Index Sensor ◽  
Polymer Waveguide ◽  
Compact Size ◽  
Potential Applications

Abstract A waveguide coupled surface plasmon sensor for detection of liquid with high refractive index (RI) is designed based on polymer materials. The effects of variation of the thickness of the Au film, polymethyl methacrylate (PMMA) buffer, and waveguide layer on the sensing performance of the waveguide are comprehensively investigated by using the finite difference method. Numerical simulations show that a thinner gold film gives rise to a more sensitive structure, while the variation of the thickness of the PMMA buffer and waveguide layer has a little effect on the sensitivity. For liquid with high RI, the sensitivity of the sensor increases significantly. When RI of liquid to be measured increases from 1.45 to 1.52, the sensitivity is as high as 4518.14nm/RIU, and a high figure of merit of 114.07 is obtained. The waveguide coupled surface plasmon RI sensor shows potential applications in the fields of environment, industry, and agriculture sensing with the merits of compact size, low cost, and high integration density.

scholarly journals Broadband and low loss high refractive index metamaterials in the microwave regime

2013 ◽  
Vol 102 (9) ◽  
pp. 091108 ◽  
Author(s):  
T. Campbell ◽  
A. P. Hibbins ◽  
J. R. Sambles ◽  
I. R. Hooper
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Low Loss ◽  
Microwave Regime

Low loss high refractive index niobium oxide waveguide platform for visible light applications

2018 ◽  
Author(s):  
Kristof Lodewijks ◽  
Suseendran Jayachandran ◽  
Tangla David Kongnyuy ◽  
Silvia Lenci ◽  
Sayantan Das ◽  
...  
Keyword(s):  
Refractive Index ◽  
Visible Light ◽  
Niobium Oxide ◽  
High Refractive Index ◽  
Low Loss

scholarly journals High refractive index and extreme biaxial optical anisotropy of rhenium diselenide for applications in all-dielectric nanophotonics

Nanophotonics ◽  
2020 ◽  
Vol 9 (16) ◽  
pp. 4737-4742
Author(s):  
Anton A. Shubnic ◽  
Roman G. Polozkov ◽  
Ivan A. Shelykh ◽  
Ivan V. Iorsh
Keyword(s):  
Refractive Index ◽  
Dimensionless Parameter ◽  
Dielectric Materials ◽  
High Refractive Index ◽  
Wide Frequency Range ◽  
Visible Range ◽  
Low Loss ◽  
Optical Susceptibility ◽  
Valence Bands ◽  
Rhenium Diselenide

AbstractWe establish a simple quantitative criterium for the search of new dielectric materials with high values of refractive index in the visible range. It is demonstrated, that for light frequencies below the bandgap, the latter is determined by the dimensionless parameter η calculated as the ratio of the sum of the widths of conduction and valence bands and the bandgap. Small values of this parameter, which can be achieved in materials with almost flat bands, lead to dramatic increase of the refractive index. We illustrate this rule with a particular example of rhenium dichalcogenides, for which we perform ab initio calculations of the band structure and optical susceptibility and predict the values of the refractive index $n{ >}5$ in a wide frequency range around 1 eV together with comparatively low losses. Our findings open new perspectives in search for the new high-index/low-loss materials for all-dielectric nanophotonics.

High-refractive index, low-loss oxyfluorosilicate glasses for sub-THz and millimeter wave applications

2019 ◽  
Vol 125 (15) ◽  
pp. 151609 ◽  
Author(s):  
Doddoji Ramachari ◽  
Chan-Shan Yang ◽  
Osamu Wada ◽  
Takashi Uchino ◽  
Ci-Ling Pan
Keyword(s):  
Refractive Index ◽  
Millimeter Wave ◽  
High Refractive Index ◽  
Low Loss
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