Nonlinear Optical Properties of 0.7(Na1/2Bi1/2)TiO3-0.3(K1/2Bi1/2)TiO3 Thin Films Using Z-Scan Technique

2013 ◽  
Vol 669 ◽  
pp. 340-348 ◽  
Author(s):  
Ting Zhang ◽  
Cai Hong Jia ◽  
Ying Bai ◽  
Wei Feng Zhang
Keyword(s):  
Thin Films ◽  
Nonlinear Optical ◽  
Sol Gel ◽  
Picosecond Laser ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
The Real ◽  
Sol Gel Process ◽  
Quartz Substrates ◽  
Third Order Nonlinear Susceptibility

Well-crystallized 0.7(Na1/2Bi1/2)TiO3-0.3(K1/2Bi1/2)TiO3 (NKBT) thin films were prepared on quartz substrates using a sol-gel process. The sign and magnitude of both the real and imaginary parts of third-order nonlinear susceptibility (3) of the thin films have been determined by the Z-scan technique performed at 532nm with picosecond laser. The nonlinear refractive index n2 and the nonlinear absorption coefficient of the thin films are determined to be 3.13×10-8 esu and 3.84×10-9 m/W, respectively. The real part and imaginary part of the third-order nonlinear susceptibility (3) of the sample were calculated and the values were 1.49×10-16 m2/V2and 3.96×10-18 m2/V2, respectively. The results suggested that the nonlinearity is dominated by the refractive for the films and the NKBT thin films is a promising material for applications in nonlinear optical devices.

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.

Nonlinear Optical Behavior of Transparent Nanohybrids of Nanocrystalline TiO2 in Poly(methyl methacrylate) Prepared by In Situ Sol-Gel Polymerization Technique

2005 ◽  
Vol 23 ◽  
pp. 367-370
Author(s):  
A.H. Yuwono ◽  
J.M. Xue ◽  
J. Wang ◽  
H.I. Elim ◽  
Wei Ji ◽  
...  
Keyword(s):  
Thin Films ◽  
Methyl Methacrylate ◽  
Nonlinear Optical ◽  
Sol Gel ◽  
Nanocrystalline Tio2 ◽  
Pump Probe ◽  
Poly Methyl Methacrylate ◽  
Ultrafast Relaxation ◽  
Quartz Substrates

Nanohybrid thin films consisting of nanocrystalline TiO2 particles in poly(methyl methacrylate)(PMMA) were successfully synthesized by in-situ sol-gel and polymerization assisted by spin coating. Using titanium isoproproxide (Ti-iP), methyl methacrylate (MMA) and 3-(trimethoxysily)propyl methacrylate (MSMA) as the starting materials, nanohybrids containing up to 60% Ti-iP in PMMA were realized. The resulting nanohybrid thin films coated on quartz substrates are optically transparent and demonstrate nonlinear optical behaviour, where their nonlinear absorption increases with the loading of Ti-iP in PMMA, as confirmed by Z-scan measurements. Using pump-probe technique, these thin films are shown to exhibit an ultrafast relaxation time of ~1.5 picosecond.

Structural, Linear and Third Order Nonlinear Optical Properties of Sol-Gel Grown Ag-CdS Nanocrystalline Thin Films

2018 ◽  
Vol 48 (2) ◽  
pp. 1122-1132 ◽  
Author(s):  
Ziaul Raza Khan ◽  
Munirah ◽  
Mohd. Shkir ◽  
Abdullah S. Alshammari ◽  
V. Ganesh ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Sol Gel ◽  
Nonlinear Optical Properties ◽  
Third Order ◽  
Nanocrystalline Thin Films

THIRD-ORDER NONLINEAR OPTICAL PROPERTY OF POLY(HEXA-2,4-DIYNYLENE-1,6-DIOXYDICINNAMATE) CONTAINING A POLAR AZO DYE, DETERMINED BY Z-SCAN TECHNIQUE

2009 ◽  
Vol 18 (01) ◽  
pp. 161-166 ◽  
Author(s):  
ALEJANDRA ORTEGA ◽  
ANA LAURA PEREZ-MARTINEZ ◽  
TAKESHI OGAWA ◽  
FRANCIS SMITH ◽  
ARDIE WALSER ◽  
...  
Keyword(s):  
Azo Dye ◽  
Nonlinear Optical ◽  
Nonlinear Optical Property ◽  
Photon Absorption ◽  
Nonlinear Susceptibility ◽  
Aromatic Rings ◽  
Third Order ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Third Order Nonlinear Susceptibility

A highly-conjugated polar dye with three aromatic rings connected with azo groups was prepared and it was incorporated in polycinnamate. It showed a third-order nonlinear susceptibility of 8 × 10-10 esu determined by a Z-scan technique. The unpoled and poled films show the same susceptibility indicating the polymer film could not be poled. The open aperture Z-scan showed negligible two-photon absorption at 1064 nm.

Cu microcrystals in sol-gel derived glasses

1995 ◽  
Vol 10 (10) ◽  
pp. 2648-2652 ◽  
Author(s):  
Masayuki Nogami ◽  
Yoshihiro Abe ◽  
Arao Nakamura
Keyword(s):  
Surface Plasmon Resonance ◽  
Absorption Band ◽  
Optical Absorption ◽  
Sol Gel ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
Optical Absorption Band ◽  
Reducing Gas ◽  
Reducing Conditions ◽  
Third Order Nonlinear Susceptibility

Cu2+-containing SiO2 and Al2O5 · 9SiO2 glasses were prepared by the sol-gel method and heated under reducing conditions to precipitate small-sized Cu and Cu2O erystals. Cu2+ ions incorporated in SiO2 glass were reduced by heating in N2 to precipitate Cu2O and in H2 to precipitate Cu microcrystals with diameters of about 5 to 15 nm. Microcrystalline Cu-precipitated glass showed an optical absorption band at 560 nm and its third-order nonlinear susceptibility was 1.25 × 10−10 esu, which originated from the enhancement by the surface plasmon resonance of Cu particles. In contrast, Cu2+ ions incorporated in Al2O3 · 9SiO2 glass remained unchanged after heating in the reducing gas atmospheres.

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