Femtosecond Maker Fringe measurement of discrete non-linearities in poled multi-layer silica structures

ABSTRACTWe report the synthesis and sol-gel polymerization of 4-nitro-N,N-bis[(3- triethoxysilyl)propyl]aniline 1. An efficient synthesis of the monomer was developed by the hydrosilylation of N, N-diallyl-4-nitroaniline. Optical quality thin films were synthesized by spin coating an n-butanol solution of 1 using formic acid as catalyst and source of water. We improved the temporal stability of the NLO signal from films prepared from 4-nitro-N,N-bis[(3-triethoxysilyl)propyl]aniline by increasing the intensity of the poling field and extending the heating period during the poling/curing stage. By Maker fringe analysis, a X(2) value of 9 × 10−8 esu was measured for these polysilsesquioxanes. If one assumes that the major component of the NLO effect is along the z-axis, the X(2) value corresponds to a d33 coefficient of 18.9 pm/V and a r33 value of 4.7 pm/V.

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Measurement of the third-order nonlinear susceptibility ratio by the CARS Maker fringe technique

Optics Communications ◽

10.1016/0030-4018(78)90248-1 ◽

1978 ◽

Vol 26 (3) ◽

pp. 466-468 ◽

Cited By ~ 6

Author(s):

S. Saikan ◽

G. Marowsky

Keyword(s):

Nonlinear Susceptibility ◽

Third Order ◽

The Third ◽

Maker Fringe ◽

Third Order Nonlinear Susceptibility

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Femtosecond Maker Fringe analysis of induced second-order nonlinearities in poled silica

10.1117/12.2037095 ◽

2013 ◽

Author(s):

Christopher W. Smelser ◽

Ksenia Yadav

Keyword(s):

Second Order ◽

Fringe Analysis ◽

Maker Fringe

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Nonlinear Optical Properties of PBT in Nematic Solutions

MRS Proceedings ◽

10.1557/proc-214-11 ◽

1990 ◽

Vol 214 ◽

Author(s):

Hedi Mattoussi ◽

Philip G. Kaatz ◽

Gary D. Patterson ◽

Guy C. Berry

Keyword(s):

Optical Properties ◽

Nonlinear Optical ◽

Nonlinear Optical Properties ◽

Lyotropic Liquid Crystal ◽

Fringe Analysis ◽

Third Order ◽

Third Harmonic ◽

Nematic Director ◽

Fringe Patterns ◽

Maker Fringe

ABSTRACTThird-order nonlinear optical properties of lyotropic liquid crystal poly(1,4-phenylene-2,6-benzobisthiazole), PBT, solutions are studied by third harmonic generation measurements. Besides the enhancement observed for this coefficient with respect to the pure PBT, coupling is observed between the mean filed nematic director n and the incident fundamental polarization B0. Different geometries, with respect to the relative orientation of B0 and n, provided different harmonic Maker Fringe Patterns. These data are compared using refractive index measurements, independently achieved on these materials, and necessary for Maker Fringe analysis.

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POLAR ORDERING IN THERMOTROPIC MESOGENS RESOLVED BY SCANNING NLO MICROSCOPY

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863506003396 ◽

2006 ◽

Vol 15 (04) ◽

pp. 431-446 ◽

Cited By ~ 2

Author(s):

OMAR G. MORALES-SAAVEDRA ◽

JÁKLI ANTAL ◽

HEPPKE GERD ◽

EICHLER HANS J.

Keyword(s):

Liquid Crystalline ◽

Room Temperature ◽

Applied Research ◽

Second Harmonic ◽

Polar Order ◽

Microscopic Scale ◽

Shg Efficiency ◽

Scanned Images ◽

Maker Fringe

A nonlinear optical (NLO) microscope has been developed based on recording the second harmonic generation (SHG) signals of the B 2- and B 4-phases of bent-shaped liquid crystalline (LC) materials. We observed that the microstructures of the polar order can be accurately characterized by 2D scanned images implementing this device. Specifically, we have investigated two bent-core compounds, which have either B 4 or B 2 phases at room temperature and exhibit SHG activity. The NLO microscope was calibrated according to the Maker fringe method allowing the in situ evaluation of the relative SHG efficiency. The developed NLO-microscopy device may serve as an important tool to characterize liquid crystalline features at a microscopic scale for both, fundamental and applied research.

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