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.

scholarly journals Highly efficient THz four-wave mixing in doped silicon

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Nils Dessmann ◽  
Nguyen H. Le ◽  
Viktoria Eless ◽  
Steven Chick ◽  
Kamyar Saeedi ◽  
...  
Keyword(s):  
Four Wave Mixing ◽  
Wave Mixing ◽  
Optical Nonlinearities ◽  
Third Order ◽  
Picosecond Pulses ◽  
Light Pulses ◽  
A Value ◽  
Doped Silicon ◽  
Perturbative Regime ◽  
Silicon Doped

AbstractThird-order non-linearities are important because they allow control over light pulses in ubiquitous high-quality centro-symmetric materials like silicon and silica. Degenerate four-wave mixing provides a direct measure of the third-order non-linear sheet susceptibility χ(3)L (where L represents the material thickness) as well as technological possibilities such as optically gated detection and emission of photons. Using picosecond pulses from a free electron laser, we show that silicon doped with P or Bi has a value of χ(3)L in the THz domain that is higher than that reported for any other material in any wavelength band. The immediate implication of our results is the efficient generation of intense coherent THz light via upconversion (also a χ(3) process), and they open the door to exploitation of non-degenerate mixing and optical nonlinearities beyond the perturbative regime.

Theoretical and Experimental Studies of Third-Order Nonlinear Optical Susceptibilities of New p-N,N'-Diamethylaniline Tetrathiafulvalene Derivatives

2000 ◽  
Vol 660 ◽  
Author(s):  
B. Sahraoui ◽  
K.J. Pluciński ◽  
M. Makowaska-Janusik ◽  
I. V. Kityk ◽  
M. Salle ◽  
...  
Keyword(s):  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Nonlinear Optical ◽  
Experimental Studies ◽  
Physical Nature ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Electronic Contribution ◽  
Optical Nonlinearities ◽  
Third Order

ABSTRACTA study was made of third-order nonlinear optical susceptibilities of new tetrathiafulvalene (TTF) derivatives, using the degenerate four wave mixing (DFWM) method, as well as complex quantum chemical calculations. To understand the physical nature of the optical nonlinearities, we separated their electronic and nuclear contributions. We found that the electronic contribution to these nonlinearities predominated. Our investigations suggest that TTF may be a highly promising material for nonlinear optics (NLO).

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.

scholarly journals Frontiers in Optics Washington Sept 2019 GO Paper JTu3A.92

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
Graphene Oxide ◽  
Conversion Efficiency ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Optical Nonlinearities

Enhanced Kerr optical nonlinearities of waveguides integrated with layered graphene oxide (GO) films is experimentally demonstrated. Up to ~9.5-dB enhancement of four-wave mixing conversion efficiency is achieved for a waveguide with 2 layers of GO.

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