scholarly journals Gyroids: Tuning the Refractive Index in Gyroid Photonic Crystals via Lead-Chalcogenide Nanocrystal Coating (Advanced Optical Materials 2/2016)

2016 ◽  
Vol 4 (2) ◽  
pp. 225-225
Author(s):  
Elena Goi ◽  
Benjamin S. Mashford ◽  
Benjamin P. Cumming ◽  
Min Gu
Keyword(s):  
Refractive Index ◽  
Photonic Crystals ◽  
Optical Materials ◽  
Lead Chalcogenide

Tuning the Refractive Index in Gyroid Photonic Crystals via Lead-Chalcogenide Nanocrystal Coating

2015 ◽  
Vol 4 (2) ◽  
pp. 226-230 ◽  
Author(s):  
Elena Goi ◽  
Benjamin S. Mashford ◽  
Benjamin P. Cumming ◽  
Min Gu
Keyword(s):  
Refractive Index ◽  
Photonic Crystals ◽  
Lead Chalcogenide

New Hierarchically Structured Optical Materials for Dynamic Refractive Index Changes

2003 ◽  
Author(s):  
Bradley F. Chmelka ◽  
Earl Danielson ◽  
Michael D. Wyrsta
Keyword(s):  
Refractive Index ◽  
Optical Materials ◽  
Index Changes

Effects of geometric and refractive index disorder on wave propagation in two-dimensional photonic crystals

2000 ◽  
Vol 62 (4) ◽  
pp. 5711-5720 ◽  
Author(s):  
A. A. Asatryan ◽  
P. A. Robinson ◽  
L. C. Botten ◽  
R. C. McPhedran ◽  
N. A. Nicorovici ◽  
...  
Keyword(s):  
Refractive Index ◽  
Wave Propagation ◽  
Photonic Crystals ◽  
Two Dimensional

Local decomposition of solid solutions, nanostructures and optical materials with negative refractive index

2016 ◽  
Vol 30 (07) ◽  
pp. 1650088
Author(s):  
Valeriy M. Ishchuk ◽  
Vladimir Sobolev
Keyword(s):  
Refractive Index ◽  
Electric Conductivity ◽  
Solid Solutions ◽  
Lead Zirconate Titanate ◽  
Perovskite Structure ◽  
Optical Materials ◽  
Negative Refractive Index ◽  
Lead Zirconate ◽  
The State ◽  
Interphase Boundaries

In this paper, a possibility of use of the controlled decomposition of solid solutions of oxides with perovskite structure in the state of coexisting domains of the antiferroelectric (AFE) and ferroelectric (FE) phases for manufacturing materials with the negative refractive index is demonstrated. The lead zirconate titanate-based solid solutions are considered as an example of substances suitable for creation of such materials. Manufactured composites constitute a dielectric AFE matrix with a structure of conducting interphase boundaries separating domains of the FE and AFE phases. The electric conductivity of the interphase boundaries occurs as a result of the local decomposition of the solid solutions in the vicinity of these boundaries. The decomposition process and consequently the conductivity of the interphase boundaries can be controlled by means of external influences.

Development of Low-Cost Abbe Refractometer

2018 ◽  
Vol 879 ◽  
pp. 227-233
Author(s):  
Weeratouch Pongruengkiat ◽  
Thitika Jungpanich ◽  
Kodchakorn Ittipornnuson ◽  
Suejit Pechprasarn ◽  
Naphat Albutt
Keyword(s):  
Refractive Index ◽  
Optical Materials ◽  
Low Cost ◽  
Optical Component ◽  
Refractive Indices ◽  
Constant Number ◽  
Optical Wavelength ◽  
Refractive Index Spectrum ◽  
Transparent Polymers ◽  
Abbe Refractometer

Refractive index and Abbe number are major physical properties of optical materials including glasses and transparent polymers. Refractive index is, in fact, not a constant number and is varied as a function of optical wavelength. The full refractive index spectrum can be obtained using a spectrometer. However, for optical component designers, three refractive indices at the wavelengths of 486.1 nm, 589.3 nm and 656.3 nm are usually sufficient for most of the design tasks, since the rest of the spectrum can be predicted by mathematical models and interpolation. In this paper, we propose a simple optical instrumental setup that determines the refractive indices at three wavelengths and the Abbe number of solid and liquid materials.

scholarly journals Titania Photonic Crystals with Precise Photonic Band Gap Position via Anodizing with Voltage versus Optical Path Length Modulation

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 651 ◽  
Author(s):  
Ermolaev ◽  
Kushnir ◽  
Sapoletova ◽  
Napolskii
Keyword(s):  
Refractive Index ◽  
Photonic Crystals ◽  
Band Gap ◽  
Titanium Oxide ◽  
Effective Refractive Index ◽  
Photonic Band Gap ◽  
Voltage Versus ◽  
Research Attention ◽  
Anodic Titanium Oxide ◽  
Photonic Band

Photonic crystals based on titanium oxide are promising for optoelectronic applications, for example as components of solar cells and photodetectors. These materials attract great research attention because of the high refractive index of TiO2. One of the promising routes to prepare photonic crystals based on titanium oxide is titanium anodizing at periodically changing voltage or current. However, precise control of the photonic band gap position in anodic titania films is a challenge. To solve this problem, systematic data on the effective refractive index of the porous anodic titanium oxide are required. In this research, we determine quantitatively the dependence of the effective refractive index of porous anodic titanium oxide on the anodizing regime and develop a model which allows one to predict and, therefore, control photonic band gap position in the visible spectrum range with an accuracy better than 98.5%. The prospects of anodic titania photonic crystals implementation as refractive index sensors are demonstrated.

scholarly journals Suppression of scattering for small dielectric particles: anapole mode and invisibility

2017 ◽  
Vol 375 (2090) ◽  
pp. 20160069 ◽  
Author(s):  
Boris Luk'yanchuk ◽  
Ramón Paniagua-Domínguez ◽  
Arseniy I. Kuznetsov ◽  
Andrey E. Miroshnichenko ◽  
Yuri S. Kivshar
Keyword(s):  
Refractive Index ◽  
Electric Dipole ◽  
Fano Resonance ◽  
Optical Materials ◽  
High Refractive Index ◽  
Destructive Interference ◽  
Total Scattering ◽  
Dipole Radiation ◽  
New Horizons ◽  
Dielectric Particles

We reveal that an isotropic, homogeneous, subwavelength particle with high refractive index can produce ultra-small total scattering. This effect, which follows from the inhibition of the electric dipole radiation, can be identified as a Fano resonance in the scattering efficiency and is associated with the excitation of an anapole mode in the particle. This anapole mode is non-radiative and emerges from the destructive interference of electric and toroidal dipoles. The invisibility effect could be useful for the design of highly transparent optical materials. This article is part of the themed issue ‘New horizons for nanophotonics’.

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