Linear and nonlinear optical properties of indeno[2,1-b]fluorene and its structural isomers

2014 ◽  
Vol 16 (44) ◽  
pp. 24592-24597 ◽  
Author(s):  
Simil Thomas ◽  
Kwang S. Kim
Keyword(s):  
Optical Properties ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Third Harmonic Generation ◽  
Nonlinear Optical Properties ◽  
Structural Isomers ◽  
Third Harmonic ◽  
Diradical Character ◽  
Linear And Nonlinear

The DMRG method reveals that third harmonic generation coefficients (γ) of indeno[2,1-b]fluorene and its structural isomers correlate with their diradical character.

Nonlinear Optical Properties of Two Thiophene-Based Polyconjugated Systems: Photoinduced Absorption and Third Harmonic Generation Spectroscopy

1989 ◽  
Vol 173 ◽  
Author(s):  
R. Zamboni ◽  
C. Taliani ◽  
G. Ruani ◽  
A. J. Pal ◽  
F. Kajzar
Keyword(s):  
Optical Properties ◽  
Conjugated Polymers ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Third Harmonic Generation ◽  
Nonlinear Optical Properties ◽  
Photoinduced Absorption ◽  
Third Harmonic ◽  
Optical Gap ◽  
The Third

ABSTRACTNonlinear optical properties of two thiophene-based conjugated polymers (PTT and PDTB) were studied by the photoinduced absorption spectroscopy and the third harmonic generation spectroscopy. The results obtained with these two methods are used to estimate the value of χ(3) in these materials. Resonant χ(3) are (2.0 ± 0.2) × 10−11 e.s.u. and (1.0 ± 0.1) × 10−11 e.s.u. for PTT and PDTB, respectively. χ(3) is shown to be related to the width of the optical gap through a sixth-power law. In PTT a vibronic structure due to the C = C stretching mode appears in the χ(3) spectrum.

Polar potassium rare earth nitrates K2[RE(NO3)5(H2O)2] (RE = La, Ce, Pr and Nd). II. Linear and nonlinear optical properties

2000 ◽  
Vol 33 (2) ◽  
pp. 380-386 ◽  
Author(s):  
H. Hellwig ◽  
S. Rühle ◽  
P. Held ◽  
L. Bohatý
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Point Group ◽  
Nonlinear Optical Properties ◽  
Rare Earth Nitrates ◽  
Linear And Nonlinear

Linear and nonlinear optical properties of the four isomorphic orthorhombic (point groupmm2) potassium rare earth nitrates K2[RE(NO3)5(H2O)2], with RE = La, Ce, Pr or Nd, have been investigated. Refractive indices in a wavelength range from 0.35 to 2.5 µm and the transmission spectra between 0.25 to 3.0 µm were measured. Using the Maker fringe technique, the d_{ijk}^{\rm\, SHG} coefficients of second-harmonic generation for a fundamental of the Nd–YAP laser (λ = 1079.5 nm) were determined for all four compounds. The d_{ijk}^{\rm\, SHG} coefficients of all four substances are about three times larger than those of KDP, as was first published by Ebberset al.[IEEE J. Quantum Electron.(1993),29, 497–507] for K2[La(NO3)5(H2O)2]. These nitrates are promising materials for application to nonlinear optics (e.g.second-harmonic generation of Nd laser radiation). The nonlinear optical properties of these compounds seem to have their origin mainly in the nitrate groups, as indicated by a simple model (summing the molecular hyperpolarizabilities of the NO3group). Neglecting local field effects, the hyperpolarizability of the NO3group was calculated as β222= 2.52 × 10−40 m4 V−1.

scholarly journals Effects of an External Magnetic Field on the Interband and Intraband Optical Properties of an Asymmetric Biconvex Lens-Shaped Quantum Dot

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 60
Author(s):  
Mher A. Mkrtchyan ◽  
David B. Hayrapetyan ◽  
Eduard M. Kazaryan ◽  
Hayk A. Sarkisyan ◽  
Maxim Ya. Vinnichenko ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Optical Properties ◽  
External Magnetic Field ◽  
Quantum Dot ◽  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Photoluminescence Spectra ◽  
Third Harmonic ◽  
Different Temperatures ◽  
Linear And Nonlinear

The theoretical investigation of interband and intraband transitions in an asymmetric biconvex lens-shaped quantum dot are considered in the presence of an external magnetic field. The selection rules for intraband transitions are obtained. The behaviors of linear and nonlinear absorption and photoluminescence spectra are observed for different temperatures and magnetic field strengths. The second and third harmonic generation coefficients as a function of the photon energy are examined both in the absence and presence of an external magnetic field.

SnGa2GeS6: synthesis, structure, linear and nonlinear optical properties

2015 ◽  
Vol 44 (16) ◽  
pp. 7404-7410 ◽  
Author(s):  
Zuohong Lin ◽  
Chao Li ◽  
Lei Kang ◽  
Zheshuai Lin ◽  
Jiyong Yao ◽  
...  
Keyword(s):  
Optical Properties ◽  
Second Harmonic Generation ◽  
Band Gap ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Nonlinear Optical Properties ◽  
Linear And Nonlinear

SnGa2GeS6 possesses a powder second harmonic generation response and a band gap of 2.04 eV.

Defect engineering, microstructural examination and improvement of ultrafast third harmonic generation in GaZnO nanostructures: a study of e-beam irradiation

2020 ◽  
Vol 22 (7) ◽  
pp. 4252-4265 ◽  
Author(s):  
Albin Antony ◽  
Poornesh P. ◽  
I. V. Kityk ◽  
K. Ozga ◽  
J. Jedryka ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electron Beam ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Third Harmonic Generation ◽  
Beam Irradiation ◽  
Defect Engineering ◽  
Third Harmonic ◽  
Doped Zno ◽  
Microstructural Examination

Electron beam induced effects on defect engineering and structural, morphological and optical properties of Ga doped ZnO (GaZnO) nanostructures for improved ultrafast nonlinear optical properties are presented.

DEVELOPMENT OF NEW NLO BORATE CRYSTALS

2001 ◽  
Vol 10 (02) ◽  
pp. 249-263 ◽  
Author(s):  
TAKATOMO SASAKI ◽  
YUSUKE MORI ◽  
MASASHI YOSHIMURA
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Uv Light ◽  
Third Harmonic Generation ◽  
Industrial Applications ◽  
Third Harmonic ◽  
Light Generation ◽  
Uv Lasers

Interests in the use of borate crystals in ultraviolet nonlinear optics have increased because all-solid-state UV lasers obtained with NLO crystals are in highly demand for scientific and industrial applications. Recently, new borate crystals, CsLiB 6 O 10 and Gd x Y 1-x Ca 4 O ( BO 3)3 have been developed by the present authors. CsLiB 6 O 10 is for fourth- and fifth-harmonic generations of Nd:YAG laser, Gd x Y 1-x Ca 4 O ( BO 3)3 for third-harmonic generation. This paper reviews the growth and nonlinear optical properties of these new borate crystals and the progress in UV light generation.

Nonlinear Optical Properties of Ladder Polymers and Their Model Compound

1990 ◽  
Vol 214 ◽  
Author(s):  
Samson A. Jenekhe ◽  
Michael Roberts ◽  
Ashwini K. Agrawal ◽  
Jeffrey S. Meth ◽  
Herman Vanherzeele
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Model Compound ◽  
Third Harmonic Generation ◽  
Nonlinear Optical Properties ◽  
Third Order ◽  
Third Harmonic ◽  
The Third ◽  
Ladder Polymers

ABSTRACTThe third order nonlinear optical properties of thin films of polybenzimidazobenzophenanthroline ladder (BBL) and semi–ladder (BBB) polymers and their model compound cis–BBB were investigated by picosecond, third harmonic generation. The χ(3) (−3ω, ω ω, ω) spectrum of BBL, BBB, and cis-BBB was obtained in the wavelength range 1.0–2.4µm and shown to exhibit a three–photon peak at respectively 1.695, 1.695, and 1.50 µm. The magnitude of the three–photon enhanced χ(3) was 6.40×10−11, 3.15×10−11, and 0.77×10−11 esu, respectively, for BBL, BBB, and cis–BBB. The results show that the χ(3) of BBL and BBB is enhanced by a factor of 50 and 17, respectively, relative to the model compound cis–BBB at 1.05µm.

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