Picosecond four‐wave‐mixing in GaN epilayers at 532 nm

1996 ◽  
Vol 68 (5) ◽  
pp. 587-589 ◽  
Author(s):  
Bahman Taheri ◽  
J. Hays ◽  
J. J. Song ◽  
B. Goldenberg
Keyword(s):  
Four Wave Mixing ◽  
Wave Mixing ◽  
532 Nm

Large Cubic Nonlinear Optical Properties of Organic Semiconductor Superlattices

1989 ◽  
Vol 173 ◽  
Author(s):  
Samson A. Jenekhe ◽  
Wen-Chang Chen ◽  
Saukwan Lo ◽  
Steven R. Flom
Keyword(s):  
Four Wave Mixing ◽  
Organic Polymer ◽  
Wave Mixing ◽  
Optical Nonlinearities ◽  
Large Magnitude ◽  
Semiconductor Superlattices ◽  
Polymer Semiconductor ◽  
Device Applications ◽  
Further Development ◽  
532 Nm

ABSTRACTWe have measured extremely large second hyperpolarizabilities〈γxxxx〉 in solutions of two recently prepared organic polymer semiconductor superlattices. These block copolymers are of alternating aromatic and quinoidal moieties and structurally differ by a side group substituent. The values observed are 1.6 × 10−29 esu for the parent copolymer (PBTBQ) and 3.7 × 10−30 esu for its acetoxy derivative (PBTABQ). The corresponding values of χ(3) are estimated to be 2.7 × 10−7 esu and 4.5 × 108 esu. The measurements, made by picosecond degenerate four wave mixing at 532 nm, showed that the dynamics of the larger χ(3) valued copolymer were faster than the 30 ps resolution of the instrument while the derivative exhibited a slower response. The large magnitude and rapid response of the cubic optical nonlinearities in these novel materials suggest theiT potential for further development and photonic device applications.

Characterisation of Liquid Brillouin Media at 532 nm

1997 ◽  
Vol 06 (01) ◽  
pp. 69-79 ◽  
Author(s):  
D. C. Jones
Keyword(s):  
Brillouin Scattering ◽  
Optical Breakdown ◽  
Gain Coefficient ◽  
High Gain ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Phase Conjugate ◽  
Brillouin Gain ◽  
Stimulated Brillouin ◽  
532 Nm

A number of transparent liquids have been evaluated for use in stimulated Brillouin scattering at 532 nm. Measurements were made of frequency shift, SBS threshold, reflectivity and optical breakdown properties. It was found that the alkanes, and in particular n-pentane, performed well and measurements were made of Brillouin gain coefficient and phonon lifetimes. It is suggested that these liquids are promising candidates for use in self-pumped phase conjugate mirrors, high gain Brillouin amplifiers and four-wave mixing mirrors.

Metal Organic Complexes for Optical Power Limiting

1994 ◽  
Vol 374 ◽  
Author(s):  
Chris M. Lawson ◽  
Tianyi Zhai ◽  
David C. Gale ◽  
Gary M. Gray
Keyword(s):  
Optical Power ◽  
Four Wave Mixing ◽  
Phosphine Ligands ◽  
Coordination Geometry ◽  
Wave Mixing ◽  
Phosphine Complexes ◽  
Organic Complexes ◽  
Metal Organic ◽  
Optical Power Limiting ◽  
532 Nm

AbstractNonlinear optical properties of transition metal-phosphine complexes have been measured at 532 nm by degenerate four-wave mixing. Large second-order molecular hyperpolarizabilities, γ, have been found for complexes containing two phosphine ligands. The measured γ values are closely related to the type and coordination geometry of the phosphine ligands, and the γ values vary as the fifth power of the number of substituents with π-electrons structure.

Nonlinear Optical Response of Poly(p-Phenylenevinylene)

1998 ◽  
Vol 07 (04) ◽  
pp. 571-579 ◽  
Author(s):  
A. V. V. Nampoothiri ◽  
B. P. Singh ◽  
G. Ravindra Kumar
Keyword(s):  
Nonlinear Optical ◽  
Four Wave Mixing ◽  
State Transitions ◽  
Wave Mixing ◽  
Third Order ◽  
Level Model ◽  
Dependent Absorption ◽  
Degenerate Four Wave Mixing ◽  
Gap States ◽  
532 Nm

Third order nonlinear optical properties of Poly(p-phenylenevinylene) have been investigated at 532 nm using degenerate four wave mixing and Z-scan techniques. Intensity dependent absorption has been attributed to photogenerated gap states arising from one-photon π–π* transition, and the coefficient of nonlinear absorption has been estimated. The observed intensity dependence of the degenerate four wave mixing signal has been explained using four-level model involving gap state transitions.

High-quality ultraviolet beam generation in multimode photonic crystal fiber through nondegenerate four-wave mixing at 532  nm

2015 ◽  
Vol 40 (10) ◽  
pp. 2389 ◽  
Author(s):  
Benoit Sévigny ◽  
Andy Cassez ◽  
Olivier Vanvincq ◽  
Yves Quiquempois ◽  
Géraud Bouwmans
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
High Quality ◽  
Beam Generation ◽  
Crystal Fiber ◽  
532 Nm

scholarly journals Synthesis, polymerization ability, nonlinear optical properties of methacrylic monomers and polymers with benzylidene moiety

2007 ◽  
Vol 1 (3) ◽  
pp. 131-135
Author(s):  
Vitaliy Smokal ◽  
◽  
Oksana Krupka ◽  
Aleksey Kolendo ◽  
Beata Derkowska ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Four Wave Mixing ◽  
Nonlinear Optical Properties ◽  
Wave Mixing ◽  
Third Order ◽  
The Third ◽  
Methacrylic Monomers ◽  
Degenerate Four Wave Mixing ◽  
532 Nm

New methacrylic monomers, their polymers with benzylidene fragment were synthesized. Structures of all compounds were determined by HNMR, UV- spectroscopies. The third order nonlinear optical properties of oxazolone, thiazolidinone and thiohydantoin containing compounds were investigated in solutions using degenerate four wave mixing (DFWM) method at 532 nm.

Non-Equilibrium Carrier Diffusion and Recombination in Semi-Insulating PVT Grown Bulk 6H-SiC Crystals

2006 ◽  
Vol 527-529 ◽  
pp. 469-472 ◽  
Author(s):  
K. Neimontas ◽  
Arunas Kadys ◽  
R. Aleksiejūnas ◽  
Kęstutis Jarašiūnas ◽  
Gil Yong Chung ◽  
...  
Keyword(s):  
Carrier Lifetime ◽  
Hole Mobility ◽  
Four Wave Mixing ◽  
Deep Levels ◽  
High Resistivity ◽  
Wave Mixing ◽  
Carrier Generation ◽  
Recombination Processes ◽  
Plasma Diffusion ◽  
532 Nm

We applied a non-degenerate four wave mixing (FWM) technique to investigate carrier generation, diffusion and recombination processes in PVT-grown semi-insulating wafers of 6H-SiC at 300 K. The resistivity of samples, cut from different places of a boule as well as from different boules, varied in range from a few ⋅cm up to 1010 ⋅cm. Interband excitation (at 355 nm) and below bandgap excitation (at 532 nm) allowed to study dynamics of the bipolar plasma and the contribution of deep levels to carrier generation and recombination. The nonequilibrium carrier lifetime was shorter in the samples of higher resistivity, in accordance with the increasing density of deep levels. The bipolar plasma diffusion in high-resistivity samples (~109 ⋅cm) provided the value of the diffusion coefficient D = 4.4 cm2/s and hole mobility μh = (88 ± 6) cm2/Vs.

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