Electro-optic and Piezoelectric Coefficients and Refractive Index of Gallium Phosphide

1974 ◽  
pp. 170-176
Author(s):  
D.F. NELSON ◽  
E.H. TURNER
Keyword(s):  
Refractive Index ◽  
Gallium Phosphide ◽  
Electro Optic

Refractive index gratings in electro-optic polymer thin films

2016 ◽  
Vol 55 (17) ◽  
pp. 4676 ◽  
Author(s):  
D. Bogunovic ◽  
S. G. Raymond ◽  
S. Janssens ◽  
D. Clarke ◽  
O. Bodley ◽  
...  
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Polymer Thin Films ◽  
Electro Optic

Variable gradient refractive index engineering: design, growth and electro-deflective application of KTa1−xNbxO3

2015 ◽  
Vol 3 (42) ◽  
pp. 10968-10973 ◽  
Author(s):  
Hao Tian ◽  
Peng Tan ◽  
Xiangda Meng ◽  
Chengpeng Hu ◽  
Bo Yao ◽  
...  
Keyword(s):  
Refractive Index ◽  
Engineering Design ◽  
Single Crystals ◽  
Coefficient Distribution ◽  
Electro Optic ◽  
Refractive Index Material ◽  
Gradient Refractive Index

A variable gradient refractive index material is proposed, utilizing the controllable quadratic electro-optic coefficient distribution in single crystals of KTa1−xNbxO3.

Electro-Optic Effects in Nanophase Polymer Dispersed Liquid-Crystal Systems

1997 ◽  
Vol 488 ◽  
Author(s):  
R. S. Blacker ◽  
K. L. Lewis ◽  
I. Mason ◽  
I. Sage ◽  
K. Webb
Keyword(s):  
Refractive Index ◽  
Composite Material ◽  
Liquid Crystal ◽  
Spectral Band ◽  
Essential Difference ◽  
New Class ◽  
Polymer Dispersed Liquid Crystal ◽  
Electro Optic ◽  
Polymer Dispersed ◽  
Polymeric Host

AbstractResearch into electro-optic effects in nanophase polymer dispersed liquid crystal (PDLC) materials has highlighted their potential as materials for a new class of tuneable filters. The structures, based on UV cured phase separated composites, contain liquid crystal both as discrete nano-scale droplets, and as material dissolved in the polymeric host. The essential difference between these materials and more conventional PDLC's is the scale of the refractive index inhomogeneity which is considerably smaller than the wavelength of visible light. Based upon effective medium approximations, the composite thus acts as a single isotropic medium, whose average refractive index is dependant on the level of applied electric field. Tuneable filters have been fabricated using the composite material for use in the visible spectral band.

scholarly journals Organic crystal-based THz source for complex refractive index measurements of window materials using single-shot THz spectroscopy

2021 ◽  
Vol 127 (11) ◽  
Author(s):  
Lufan Du ◽  
Franz Roeder ◽  
Yun Li ◽  
Mostafa Shalaby ◽  
Burgard Beleites ◽  
...  
Keyword(s):  
Refractive Index ◽  
Complex Refractive Index ◽  
Accurate Determination ◽  
Laser Pulses ◽  
Thz Spectroscopy ◽  
Thz Radiation ◽  
Single Shot ◽  
Detection Scheme ◽  
Electro Optic

AbstractWe employed N-benzyl-2-methyl-4-nitroaniline (BNA) crystals bonded on substrates of different thermal conductivity to generate THz radiation by pumping with 800 nm laser pulses. Crystals bonded on sapphire substrate provided four times more THz yield than glass substrate. A pyrodetector and a single-shot electro-optic (EO) diagnostic were employed for measuring the energy and temporal characterisation of the THz pulse. Systematic studies were carried out for the selection of a suitable EO crystal, which allowed accurate determination of the emitted THz spectrum from both substrates. Subsequently, the THz source and single-shot electro-optic detection scheme were employed to measure the complex refractive index of window materials in the THz range.

Epitaxially induced secondary grain growth in Ti:LiNbO3 optical waveguides

1989 ◽  
Vol 47 ◽  
pp. 424-425
Author(s):  
M. A. McCoy
Keyword(s):  
Electron Microscopy ◽  
Solid Solution ◽  
Transmission Electron Microscopy ◽  
Refractive Index ◽  
Lithium Niobate ◽  
Grain Growth ◽  
Optical Waveguides ◽  
Waveguide Devices ◽  
Transmission Electron ◽  
Electro Optic

Lithium niobate (LiNbO3) is one of the most promising materials for use in hybrid optical waveguide devices because of its high electro-optic coefficient and its availability as large single crystals. Optical waveguides in LiNbO3 are most commonly made by Ti indiffusion in which strips of Ti metal (between 10 and 100 nm thick) are deposited on a single crystal LiNbO3 substrate. The device is then heated to temperatures around 1000°C typically for 6 hours. During this time, the Ti diffuses into the LiNbO3 to form a Ti-rich LiNbO3 solid solution. This solid solution has a higher refractive index than the substrate and forms the waveguide region. Factors controlling the indiffusion process, however, are not very well understood and very little is known about the microstructural changes which occur during Ti indiffusion. In this study, the microstructure of Ti:LiNbO3 optical waveguides was examined as a function of time and temperature using transmission electron microscopy (TEM).

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