Rotational reorientation dynamics of nonlinear optical chromophores in rubbery and glassy polymers: .alpha.-relaxation dynamics probed by second harmonic generation and dielectric relaxation

1993 ◽  
Vol 26 (22) ◽  
pp. 5943-5953 ◽  
Author(s):  
Ali Dhinojwala ◽  
George K. Wong ◽  
John M. Torkelson
Keyword(s):  
Second Harmonic Generation ◽  
Dielectric Relaxation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Glassy Polymers ◽  
Relaxation Dynamics ◽  
Reorientation Dynamics ◽  
Nonlinear Optical Chromophores ◽  
Optical Chromophores

Preparation and Second-Harmonic Generation Properties of a Self-Assembled Multilayer Film Based on Nanoporous Isopolyoxomolybdate and Bipolar Hemicyanine

2008 ◽  
Vol 8 (3) ◽  
pp. 1355-1358 ◽  
Author(s):  
Li-Hua Gao ◽  
Xiao-Juan Hu ◽  
De-Sheng Zheng ◽  
Yuan Guo ◽  
Ke-Zhi Wang
Keyword(s):  
Second Harmonic Generation ◽  
Film Thickness ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Multilayer Film ◽  
Second Harmonic ◽  
Square Roots ◽  
Self Assembled ◽  
Nonlinear Optical Chromophores ◽  
Optical Chromophores

An electrostatic self-assembled multilayer film has successfully been prepared by alternating adsorption of a wheel-shaped nanoporous isopolyoxomolybdate and a bipolar hemicyanine derivative, as monitored by absorption spectroscopy. The square roots of second-harmonic intensities of the film exhibit quadratic dependence on film thickness up to 10 layers. The average titled angle of the nonlinear optical chromophores to the substrate normal is derived to be 34° by polarized second-harmonic generation measurements.

scholarly journals Second harmonic generation in nonlinear optical films

1994 ◽  
Vol 35 (4) ◽  
pp. 1622-1633 ◽  
Author(s):  
Gang Bao ◽  
David C. Dobson
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Optical Films

Enhancement of second harmonic generation using a novel asymmetric metal–graphene–insulator–metal plasmonic waveguide

2018 ◽  
Vol 27 (01) ◽  
pp. 1850003 ◽  
Author(s):  
Mohamadreza Soltani
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Field Enhancement ◽  
The Other ◽  
Nonlinear Susceptibility ◽  
Optical Process ◽  
Large Enhancement ◽  
Nonlinear Optical Process

Here, we propose a novel plasmonic structure, called asymmetric plasmonic nanocavity grating (APNCG), which is shown to dramatically enhance nonlinear optical process of second harmonic generation (SHG). The proposed structure consists of two different metals on both sides of lithium niobate and a thin layer of graphene. By using two different metals the nonlinear susceptibility of the waveguide would be increased noticeably causing to increase SHG. On the other hand, it consists of two identical gratings on one side. By two identical gratings, the pump beam is coupled to two opposing SPP waves, which interfere with each other and result in SPP standing wave in the region between the two gratings. The distance between two gratings will be optimized to reach the highest SHG. It will be shown that by optimizing the geometry of proposed structure and using different metals, field enhancement in APNCG waveguides can result in large enhancement of SHG.

scholarly journals In situ second-harmonic generation mediated photodynamic therapy by micelles co-encapsulating coordination nanoparticle and photosensitizer

RSC Advances ◽  
2017 ◽  
Vol 7 (82) ◽  
pp. 52125-52132 ◽  
Author(s):  
Xuyang Zhou ◽  
Yang Chen ◽  
Jian Su ◽  
Xiaohe Tian ◽  
Yonghuang Luo ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Property A

NIR-PDT strategy was introduced by employing a nonlinear optical conveyor bearing strong second-harmonic generation (SHG) property. A biocompatible micellic system co-delivered the conveyor and photosensitizer for in situ NIR-PDT.

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