scholarly journals Precise Measurements of the Quadratic Electro-Optic Effect in KH2PO4 Crystals Using a Sénarmont-Type System

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5435
Author(s):  
Marek Izdebski
Keyword(s):  
Electric Field ◽  
Applied Electric Field ◽  
Type System ◽  
Induced Polarization ◽  
Transmission Characteristic ◽  
Specific Point ◽  
Relative Temperature ◽  
New Approach ◽  
Temperature Changes ◽  
Electro Optic

This paper presents precise measurements of the temperature dependencies of the quadratic electro-optic coefficients g1111−g1122 and ne3g3333−no3g1133 in KH2PO4 crystals. In addition to traditional electro-optic coefficients describing changes in the function of an applied electric field, intrinsic coefficients, defined in terms of induced polarization, are also considered. Both intrinsic coefficients decrease with increases in temperature, but the relative temperature changes are of different orders of magnitude: 10−4 and 10−3 K−1. A Sénarmont-type setup was used for the electro-optic measurements. To achieve the best accuracy, a new approach was developed, in which, instead of using only one specific point on the modulator’s transmission characteristic, the operating point is changed during the measurements.

Comparison between Ferromagnetic and Ferroelectric Optical Switch Devices in Terms of the Response to the Electric Field

2018 ◽  
Vol 23 ◽  
pp. 1-7
Author(s):  
Rabi Noori Hammudi ◽  
Sudad Salman Al-Bassam ◽  
Rawa Khalil Ibrahim ◽  
Aseel Ibrahim Mahmood ◽  
Peter Kopčanský ◽  
...  
Keyword(s):  
Magnetic Material ◽  
Electric Field ◽  
Response Time ◽  
Applied Electric Field ◽  
Optical Switch ◽  
Ferroelectric Material ◽  
Optical Effect ◽  
Constituent Material ◽  
Electro Optic ◽  
The Difference

In this work we have studied the electro-optical effect of two types of ferronematic nanoparticles. The first sample doped with magnetic material Fe3O4 and the second sample doped with a ferroelectric material SbSI. The difference in the two types of material that has been vaccinated led to different values of electro-optic properties because of the different susceptibility of materials. We have noticed that the material SbSI was more responsive to the applied electric field due to the nature of the constituent material (electric material) than the Fe3O4 ferromagnetic. The response time for the material SbSI is less than the response time of the ferromagnetic Fe3O4, that led to make the material SbSI best in the optical switch applications.

ELECTRO-OPTIC EFFECT IN A SEMI-PARABOLIC QUANTUM WELL WITH AN APPLIED ELECTRIC FIELD

2003 ◽  
Vol 17 (09) ◽  
pp. 347-354 ◽  
Author(s):  
LI ZHANG ◽  
HONG-JING XIE
Keyword(s):  
Electric Field ◽  
Quantum Well ◽  
Applied Electric Field ◽  
Field Effect ◽  
Harmonic Oscillation ◽  
Electric Field Effect ◽  
Confining Potential ◽  
Compact Density ◽  
Electro Optic ◽  
Potential Frequency

By using the compact density matrix approach, the electro-optic effect (EOE) in a semi-parabolic quantum well (QW) with an applied electric field has been theoretically investigated. Via a variant of displacement harmonic oscillation, the exact electronic states in the semi-parabolic QW with an applied electric field are obtained. Numerical results on typical GaAs material reveal that the electro-optic effect nearly linearly increases with the increasing of magnitude of the electric field, but it monotonously decreases with the increasing of confining potential frequency of the semi-parabolic QW. The EOE in the model investigated is 102 times larger than that in the symmetric parabolic QW under the same electric field and the same frequency of parabolic confining potential, which is due to the self-asymmetry of the system and the electric field effect.

scholarly journals Metaelectric multiphase transitions in a highly polarizable molecular crystal

2020 ◽  
Vol 11 (24) ◽  
pp. 6183-6192
Author(s):  
Sachio Horiuchi ◽  
Shoji Ishibashi ◽  
Rie Haruki ◽  
Reiji Kumai ◽  
Satoshi Inada ◽  
...  
Keyword(s):  
Electric Field ◽  
Applied Electric Field ◽  
Molecular Crystal ◽  
Organic Crystal ◽  
Temperature Changes

An applied electric field and/or temperature changes can interconvert the low- and high-dipole states of molecules in a metaelectric organic crystal.

Dynamic Response of the Electro-Optic Effect in Epitaxial Ferroelectric Thin Films

1999 ◽  
Vol 597 ◽  
Author(s):  
B. H. Hoerman ◽  
J. C. Majewski ◽  
B. M. Nichols ◽  
A. Teren ◽  
B. W. Wessels
Keyword(s):  
Thin Films ◽  
Electric Field ◽  
Dynamic Response ◽  
Applied Electric Field ◽  
Physical Mechanism ◽  
Ferroelectric Thin Films ◽  
Epitaxial Thin Films ◽  
Electronic Polarizability ◽  
Electro Optic ◽  
Logarithmic Dependence

AbstractThe dynamic response of the electro-optic coefficients and the electronic polarizability for epitaxial thin films of KnbO3 and BaTiO3 are measured. For these two systems a logarithmic dependence of the electro-optic response and the polarization on time was observed after removal of an applied electric field. The dynamic response of the electro-optic effect and the polarization of the films are attributed to the same physical mechanism, which we associate with the dynamic response of ferroelectric nanodomains.

LIQUID CRYSTLASLIGHT SCATTERING BY FLUCTUATIONS INDUCED BY AN APPLIED ELECTRIC FIELD IN A NEMATIC LIQUID CRYSTAL (APAPA)

1972 ◽  
Vol 33 (C1) ◽  
pp. C1-63-C1-67 ◽  
Author(s):  
M. BERTOLOTTI ◽  
B. DAINO ◽  
P. Di PORTO ◽  
F. SCUDIERI ◽  
D. SETTE
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Applied Electric Field

Improved technique for measuring mechanical deformations induced by an applied electric field to an organic insulator

2012 ◽  
Vol 15 (2-3) ◽  
pp. 127-139
Author(s):  
Tung Tran Anh ◽  
Laurent Berquez ◽  
Laurent Boudou ◽  
Juan Martinez-Vega ◽  
Alain Lacarnoy
Keyword(s):  
Electric Field ◽  
Applied Electric Field ◽  
Mechanical Deformations ◽  
Improved Technique

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.

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