Epitaxial KNbo3 and its Nonlinear Optical Properties

1998 ◽  
Vol 541 ◽  
Author(s):  
Barbara M. Nichols ◽  
Bruce W. Wessels ◽  
John A. Belot ◽  
Tobin J. Marks
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Volume Fraction ◽  
Second Harmonic ◽  
Strong Dependence ◽  
Chemical Vapor ◽  
Nonlinear Optical Properties ◽  
X Ray Diffraction ◽  
Nonlinear Optical Susceptibility ◽  
Variant Structure

AbstractThe nonlinear optical properties of epitaxial KNbO3 were studied for films grown by metalorganic chemical vapor deposition on different substrates. X-ray diffraction revealed epitaxial KNbO3 with a (110) orientation for layers deposited on single crystal strontium titanate. Whereas, films grown on (100) spinel exhibited a multi-variant structure, consisting of the (110) and (001) orientations. The volume fraction of each crystallographic variant in the film was calculated. Second harmonic generation measurements at 532 nm were performed to determine the ferroelectric domain variants present. The Maker-fringe technique was employed to obtain the effective nonlinear optical susceptibility of the films, which ranged from 0.1 - 1.8 pm/V. The SHG intensity profiles reveal a strong dependence upon substrate type.

scholarly journals Scalable Production of Boron Quantum Dots for Broadband Ultrafast Nonlinear Optical Performance

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 687
Author(s):  
Shuolei Meng ◽  
Qianyuan Chen ◽  
Hongjian Lin ◽  
Feng Zhou ◽  
Youning Gong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Relaxation Time ◽  
Nonlinear Optical ◽  
Average Diameter ◽  
Optical Devices ◽  
Nonlinear Optical Properties ◽  
Saturable Absorption ◽  
Nonlinear Optical Susceptibility ◽  
Tandem Structure

A simple and effective approach based on the liquid phase exfoliation (LPE) method has been put forward for synthesizing boron quantum dots (BQDs). By adjusting the interactions between bulk boron and various solvents, the average diameter of produced BQDs is about 7 nm. The nonlinear absorption (NLA) responses of as-prepared BQDs have been systematically studied at 515 nm and 1030 nm. Experimental results prove that BQDs possess broadband saturable absorption (SA) and good third-order nonlinear optical susceptibility, which are comparable to graphene. The fast relaxation time and slow relaxation time of BQDs at 515 nm and 1030 nm are about 0.394–5.34 ps and 4.45–115 ps, respectively. The significant ultrafast nonlinear optical properties can be used in optical devices. Here, we successfully demonstrate all-optical diode application based on BQDs/ReS2 tandem structure. The findings are essential for understanding the nonlinear optical properties in BQDs and open a new pathway for their applications in optical devices.

scholarly journals Nonlinear Optical Properties of Spheroidal Metallic Inclusions in a Dielectric Medium

2011 ◽  
Vol 2011 ◽  
pp. 1-9
Author(s):  
Bernard de Dormale ◽  
Vo-Van Truong
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Symmetry Axis ◽  
Rotational Symmetry ◽  
Strong Dependence ◽  
Wavelength Region ◽  
Nonlinear Optical Properties ◽  
Linear Absorption ◽  
Direction Parallel ◽  
Depolarization Factor

A model for linear and nonlinear optical properties of a composite material consisting of spheroidal metal inclusions embedded in a host medium has been formulated using an effective medium approach. Both aligned and randomly oriented spheroids have been considered, and the results obtained showed a considerable difference between the two situations. Numerical calculations for metallic Au inclusions in a glass matrix have shown that the linear absorption in the case of aligned spheroids with their symmetry axis parallel to the z-axis is largely dependent on the depolarization factor, exhibiting an absorption in the vicinity of 500 nm when the depolarization factor in the direction parallel to the rotational symmetry axis is small. This structure shifts progressively to higher wavelengths when this depolarization factor is increased. In the case of randomly oriented spheroids, contributions from the different particle depolarization factors are present and prominent structures in the linear absorption appear in the long wavelength region, beyond 700 nm. Nonlinear optical properties for both aligned and randomly oriented spheroids also show a strong dependence on the depolarization factor and significant enhancements of these properties can be observed, suggesting possible tailoring of composite properties for various applications.

Epitaxial Niobate Thin Films and Their Nonlinear Optical Properties

1995 ◽  
Vol 401 ◽  
Author(s):  
B. W. Wessels ◽  
M. J. Nystrom ◽  
J. Chen ◽  
D. Studebaker ◽  
T. J. Marks
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Chemical Vapor ◽  
Nonlinear Optical Properties ◽  
Organic Chemical ◽  
Epitaxial Thin Films ◽  
Non Linear ◽  
Metal Organic ◽  
Linear Optical

AbstractFerroelectric oxide thin films show considerable potential as electro-optic and non-linear optical materials. Of particular interest are the niobates such as strontium barium niobate and potassium niobate. The growth of these epitaxial oxide films by metal-organic chemical vapor deposition (MOCVD) has been investigated. This technique has yielded epitaxial thin films with excellent non-linear optical properties. Issues concerning the epitaxy of these thin films and its relationship to their optical and nonlinear optical properties are discussed.

K2Sn2ZnSe6, Na2Ge2ZnSe6, and Na2In2GeSe6: a new series of quaternary selenides with intriguing structural diversity and nonlinear optical properties

2016 ◽  
Vol 45 (18) ◽  
pp. 7627-7633 ◽  
Author(s):  
Molin Zhou ◽  
Chao Li ◽  
Xiaoshuang Li ◽  
Jiyong Yao ◽  
Yicheng Wu
Keyword(s):  
Optical Properties ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Structural Diversity ◽  
Nonlinear Optical Properties

New selenides K2Sn2ZnSe6, Na2Ge2ZnSe6, and Na2In2GeSe6 exhibit diverse structures and Na2In2GeSe6 possesses a moderate second harmonic generation response.

Crystal growth, X-ray diffraction and nonlinear optical properties of Nb:KTiOPO4 crystal

2000 ◽  
Vol 218 (1) ◽  
pp. 98-102 ◽  
Author(s):  
D.Y Zhang ◽  
H.Y Shen ◽  
W Liu ◽  
W.Z Chen ◽  
G.F Zhang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Crystal Growth ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
X Ray Diffraction ◽  
X Ray

Effect of Electric Field on Nonlinear Optical Properties of Hydrazone Doped PMMA Films

2012 ◽  
Vol 584 ◽  
pp. 88-91
Author(s):  
N.K. Siji Narendran ◽  
K.R. Reshma ◽  
P. Sudheesh ◽  
K. Chandrasekharan
Keyword(s):  
Optical Properties ◽  
Electric Field ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Laser Pulses ◽  
Nonlinear Optical Properties ◽  
Third Order ◽  
Single Beam ◽  
Solution Casting Method ◽  
Order Susceptibility

We report the effect of electric field on third order nonlinear optical properties of Hydrazone (Hz) doped Polymethyl methacrylate (PMMA) films. The films were prepared by solution casting method. Poling of films was done by corona discharge. Single beam Z-scan technique with 7ns Nd: YAG laser pulses at 532nm were employed for the measurements. Third order susceptibility of films was measured with an emphasis on the applied electric field. We also demonstrated the second harmonic generation in the corona poled films.

Sign in / Sign up

Export Citation Format

Share Document