Comparison of electric field and charge density distributions using the Kerr electro-optic method with blade-plane and point-plane electrodes

2003 ◽  
Author(s):  
A. Helgeson ◽  
M. Zahn
Keyword(s):  
Electric Field ◽  
Charge Density ◽  
Density Distributions ◽  
Electro Optic

On the Calculation of Electric Field Gradients in Layered Compounds

2002 ◽  
Vol 57 (6-7) ◽  
pp. 518-522 ◽  
Author(s):  
Tilman Butz
Keyword(s):  
Electric Field ◽  
Charge Density ◽  
Fourier Expansion ◽  
Fourier Coefficients ◽  
Analytical Formula ◽  
Layered Compounds ◽  
Electric Field Gradients ◽  
Density Distributions ◽  
Field Gradients ◽  
Arbitrary Charge

An analytical formula is derived for the electric field gradient (EFG) of a thin slab with an arbitrary charge density in the - -plane without -dispersion, based on its Fourier expansion. It turns out that the EFG is dominated by the leading Fourier-coefficients for thin slabs and reduces to a contact-term proportional to the charge density at the nucleus in the truly two-dimensional case. An extension to charge density distributions which are factorizable into a function f(x,y) and g(Z) is given with an example for a Gaussian g(Z). The consequences for EFGs in layered compounds such as TaS2 and TaSe2 are discussed

scholarly journals Electro-Optic Control of Lithium Niobate Bulk Whispering Gallery Resonators: Analysis of the Distribution of Externally Applied Electric Fields

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 298
Author(s):  
Yannick Minet ◽  
Hans Zappe ◽  
Ingo Breunig ◽  
Karsten Buse
Keyword(s):  
Lithium Niobate ◽  
Electric Field ◽  
Electric Fields ◽  
Frequency Comb ◽  
Parametric Oscillation ◽  
Pockels Effect ◽  
Optical Mode ◽  
Cylindrical Resonator ◽  
Whispering Gallery ◽  
Electro Optic

Whispering gallery resonators made out of lithium niobate allow for optical parametric oscillation and frequency comb generation employing the outstanding second-order nonlinear-optical properties of this material. An important knob to tune and control these processes is, e.g., the linear electro-optic effect, the Pockels effect via externally applied electric fields. Due to the shape of the resonators a precise prediction of the electric field strength that affects the optical mode is non-trivial. Here, we study the average strength of the electric field in z-direction in the region of the optical mode for different configurations and geometries of lithium niobate whispering gallery resonators with the help of the finite element method. We find that in some configurations almost 100% is present in the cavity compared to the ideal case of a cylindrical resonator. Even in the case of a few-mode resonator with a very thin rim we find a strength of 90%. Our results give useful design considerations for future arrangements that may benefit from the strong electro-optic effect in bulk whispering gallery resonators made out of lithium niobate.

Reconstruction of the Charge Density Wave State Under the Applied Electric Field

2012 ◽  
Vol 25 (5) ◽  
pp. 1323-1327 ◽  
Author(s):  
Tianyou Yi ◽  
Yulang Luo ◽  
Alvaro Rojo-Bravo ◽  
Natacha Kirova ◽  
Serguei Brazovskii
Keyword(s):  
Electric Field ◽  
Charge Density ◽  
Applied Electric Field ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave State

Measurement of linear electro-optic effect in temperature/electric-field poled optical fibres

1994 ◽  
Vol 30 (25) ◽  
pp. 2162-2163 ◽  
Author(s):  
X.-C. Long ◽  
R.A. Myers ◽  
S.R.J. Brueck
Keyword(s):  
Electric Field ◽  
Optical Fibres ◽  
Electro Optic
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