Quadratic Nonlinear Optical Properties of Diva Crystal

1989 ◽  
Vol 173 ◽  
Author(s):  
T. Wada ◽  
C. H. Grossman ◽  
S. Yamada ◽  
A. Yamada ◽  
A. F. Garito ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Nonlinear Optical Properties ◽  
Crystallographic Structure ◽  
Type I ◽  
Sum Frequency ◽  
Fundamental Wavelength ◽  
Efficient Type ◽  
Light Generation

ABSTRACTNew organic nonlinear optical crystal : dicyanovinyl anisole (DIVA) has been grown from vapor by low pressure sublimation and from saturated solution by solvent evaporation. Crystallographic structure and quadratic nonlinear optical properties were investigated. Molecular orientation in DIVA crystal with space group P21, is favorable for the highest possible value of bulk phase-matchable coefficient. Both type I and type II phase matched second harmonic generation (PMSHG) were observed from naturally grown faces of single crystals. Efficient PMSHG was achieved at a fundamental wavelength of 812 and 1064 nm. The efficient type I PMSHG coefficient was determined as deff = 4.9 × 10−8 esu = 40 × (d11 of α-quartz) at a wave.LH length of 1064 nm. Blue light generation was demonstrated by both PMSHG and sum-frequency mixing of the 812 nm laser with 1064 nm.

scholarly journals Intra-Molecular Electrical Field Regulated Nonlinear Catalyst Charge Transfer in the Organic Conjugated Molecular System

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1375
Author(s):  
Quanjiang Li ◽  
Shenghui Chen ◽  
Li Wang ◽  
Yanli Liu ◽  
Di He ◽  
...  
Keyword(s):  
Optical Properties ◽  
Charge Transfer ◽  
Electric Fields ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Molecular System ◽  
Nonlinear Optical Properties ◽  
Electrical Field ◽  
Molecular Systems ◽  
Sum Frequency

The application of organic conjugated molecular systems to photocatalysis is based on the charge transition with different electronegative substituents and the electron–hole separation behavior of charge transfer under light excitation. In this work, the relationship between the intra-molecular electrical field and molecular second-order nonlinear optical properties is investigated theoretically by the sum-of-states (SOS) method. We use substituents with different electron affinity energy to construct internal electric fields with different properties in similar conjugated systems. The studies of these systems reveal the intra-molecular electric field strength and mode regulation of nonlinear optical coefficients and explain its physical mechanism. The intra-molecular charge recombination caused by the electrostatic potential multipole field of different substituents changes the transition behavior of one-photon, resulting in the enhancement of nonlinear optical properties (second-harmonic generation and sum-frequency coefficient) greater than 104.

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.

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.

Synthesis and Second-Order Nonlinear Optical Properties of New Coumaromethacrylate-Methylmethacrylate Copolymers

1989 ◽  
Vol 173 ◽  
Author(s):  
R. A. Henry ◽  
J. M. Hoover ◽  
A. Knoesen ◽  
S. T. Kowel ◽  
G. A. Lindsay ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Elevated Temperatures ◽  
Second Harmonic ◽  
Second Order ◽  
Nonlinear Optical Properties ◽  
Glass Transitions ◽  
Copolymer Films ◽  
New Family ◽  
Polymerizable Group

ABSTRACTThe synthesis and second-order nonlinear optical (NLO) properties of a new family of optically nonlinear coumarin dye-containing polymers is reported. Polymerizable coumaromethacrylate (CMA) monomers having various alkyl spacers (C2 to C5) between the polymerizable group and the chromophore were prepared and copolymerized with methylmethacrylate (MMA) and other vinyl monomers. The CMA copolymers had high chromophoric content (up to 18 × 1020) and glass transitions as high as 132°C. Spin cast films were prepared on BK7 substrates and oriented by corona-onset poling at elevated temperatures (COPET). The poled CMA copolymer films were characterized for spectroscopic absorption and second harmonic properties. A comparison of the nonlinear optical properties of poled CMA-MMA copolymers to poled guest-host systems is made. Relative to guest/host systems, CMA-MMA copolymer films exhibit larger and much more stable second-order nonlinear optical properties.

Investigation of the nonlinear optical properties of metamaterials by second harmonic generation

2011 ◽  
Vol 105 (1) ◽  
pp. 149-162 ◽  
Author(s):  
M. Gentile ◽  
M. Hentschel ◽  
R. Taubert ◽  
H. Guo ◽  
H. Giessen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Nonlinear Optical Properties
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