NONLINEAR OPTICAL DEVICES: PROPERTIES OF POLYANILINE BASED CONDUCTING POLYMERS

2003 ◽  
Vol 12 (01) ◽  
pp. 39-43 ◽  
Author(s):  
SUDHIR KUMAR SHARMA ◽  
S. C. K. MISRA ◽  
K. N. TRIPATHI
Keyword(s):  
Optical Properties ◽  
Optical Absorption ◽  
Conducting Polymers ◽  
Spectral Range ◽  
Nonlinear Optical ◽  
Energy Gap ◽  
Optical Devices ◽  
Molecular Architecture ◽  
Nonlinear Optical Devices ◽  
Backbone Structure

We report on the investigation of a series of polyaniline based conducting polymers with rather different backbone structure and energy gap in order to explore the effect of their molecular architecture on nonlinear optical properties. In particular, we report on the dispersion of x(3)(-ω;ω, -ω, ω) in the spectral range covering the rising slope of the optical absorption as well as in off resonance conditions.

scholarly journals Scalable Production of Boron Quantum Dots for Broadband Ultrafast Nonlinear Optical Performance

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 687
Author(s):  
Shuolei Meng ◽  
Qianyuan Chen ◽  
Hongjian Lin ◽  
Feng Zhou ◽  
Youning Gong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Relaxation Time ◽  
Nonlinear Optical ◽  
Average Diameter ◽  
Optical Devices ◽  
Nonlinear Optical Properties ◽  
Saturable Absorption ◽  
Nonlinear Optical Susceptibility ◽  
Tandem Structure

A simple and effective approach based on the liquid phase exfoliation (LPE) method has been put forward for synthesizing boron quantum dots (BQDs). By adjusting the interactions between bulk boron and various solvents, the average diameter of produced BQDs is about 7 nm. The nonlinear absorption (NLA) responses of as-prepared BQDs have been systematically studied at 515 nm and 1030 nm. Experimental results prove that BQDs possess broadband saturable absorption (SA) and good third-order nonlinear optical susceptibility, which are comparable to graphene. The fast relaxation time and slow relaxation time of BQDs at 515 nm and 1030 nm are about 0.394–5.34 ps and 4.45–115 ps, respectively. The significant ultrafast nonlinear optical properties can be used in optical devices. Here, we successfully demonstrate all-optical diode application based on BQDs/ReS2 tandem structure. The findings are essential for understanding the nonlinear optical properties in BQDs and open a new pathway for their applications in optical devices.

Silicon-based nonlinear optical devices for high-speed optical communications

2008 ◽  
Author(s):  
Haisheng Rong ◽  
Simon Ayotte ◽  
Shengbo Xu ◽  
Oded Cohen ◽  
Mario Paniccia
Keyword(s):  
Optical Communications ◽  
High Speed ◽  
Nonlinear Optical ◽  
Optical Devices ◽  
Nonlinear Optical Devices ◽  
Silicon Based

Glass Structures and Linea/Nonlinear Optical Properties of Ag2O-Doped TeO2 Glasses

2014 ◽  
Vol 617 ◽  
pp. 141-144 ◽  
Author(s):  
Yusuke Kasuya ◽  
Toshiki Suhara ◽  
Tomokatsu Hayakawa ◽  
Philippe Thomas ◽  
Masayuki Nogami
Keyword(s):  
Optical Properties ◽  
Absorption Edge ◽  
Photoelectron Spectroscopy ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
Nonlinear Properties ◽  
Nonlinear Optical Devices ◽  
Third Order Nonlinear Susceptibility

A family of TeO2-based glasses is known to have high third-order nonlinear properties and expected as nonlinear optical devices. In the present study, we fabricated Ag2O-TeO2 and Ag2O-Nb2O5-TeO2 glasses, and estimated their structures and linear/nonlinear optical properties. The main results showed that the absorption-edge of the glasses was shifted to longer wavelength side with increasing Ag2O content. By Raman spectroscopy, it was found that an increase in Ag2O content promoted to change TeO4 to TeO3/TeO3+1 units. X-ray photoelectron spectroscopy (XPS) revealed the presence of an electronic state of Ag2+ ions, which was supposed to have a large influence on the absorption-edge wavelength. In Ag2O-Nb2O5-TeO2 glass system, the third-order nonlinear susceptibility χ(3) increased with increasing Ag2O content at the expense of Nb2O5 content.

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