Non resonant excitonic effects on the third order nonlinear properties of TiO2: From amorphous to rutile phase

2014 ◽  
Vol 56 ◽  
pp. 207-210 ◽  
Author(s):  
S. Divya ◽  
Indu Sebastian ◽  
V.P.N. Nampoori ◽  
P. Radhakrishnan ◽  
A. Mujeeb
Keyword(s):  
Rutile Phase ◽  
Third Order ◽  
Nonlinear Properties ◽  
The Third ◽  
Excitonic Effects

OPTICAL NONLINEARITY OF CdSe AND CdSe-C60 QUANTUM DOT

2008 ◽  
Vol 22 (32) ◽  
pp. 3207-3213 ◽  
Author(s):  
HAO SONG ◽  
YUE-YING ZHAI ◽  
ZHANG-KAI ZHOU ◽  
ZHONG-HUA HAO ◽  
LI ZHOU
Keyword(s):  
Quantum Dots ◽  
Nonlinear Refraction ◽  
Refraction Index ◽  
Optical Nonlinearity ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Third Order ◽  
Picosecond Pulses ◽  
Nonlinear Properties ◽  
The Third

The third-order optical nonlinear properties of CdSe quantum dots (QDs) and CdSe - C 60 QDs are investigated by Z-scan technique with picosecond pulses at the wavelength of 800 nm. The value of the nonlinear absorption coefficient β of CdSe - C 60 QDs is measured to be 2.9 cm/GW, which is about two times larger than that of CdSe QDs. The nonlinear refraction index γ of CdSe - C 60 QDs is -2.8 × 10-3 cm 2/ GW , which is about seven times larger than that of CdSe QDs. Presence of C 60 contributes to the larger optical nonlinearity of CdSe - C 60 QDs comparing with CdSe QDs.

Measurement of the third order nonlinear properties of conjugated polymers embedded in porous silicon and silica

2005 ◽  
Vol 2 (9) ◽  
pp. 3232-3236 ◽  
Author(s):  
C. Simos ◽  
L. Rodriguez ◽  
V. Skarka ◽  
X. Nguyen Phu ◽  
N. Errien ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Conjugated Polymers ◽  
Third Order ◽  
Nonlinear Properties ◽  
The Third

SYNTHESIS AND NON-RESONANT NONLINEAR OPTICAL PROPERTIES OF PUSH-PULL SIDE-CHAIN AZOBENZENE POLYMERS

2011 ◽  
Vol 20 (01) ◽  
pp. 1-13 ◽  
Author(s):  
K. FEDUS ◽  
V. SMOKAL ◽  
O. KRUPKA ◽  
G. BOUDEBS
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Absorption Coefficient ◽  
Nonlinear Optical ◽  
Side Chain ◽  
Side Group ◽  
Third Order ◽  
Active Molecule ◽  
Nonlinear Properties ◽  
The Third

In this work, we report preliminary results obtained for methacrylic polymers incorporating azobenzene side-group as nonlinear optical (NLO) active molecule. The trans-cis isomerization properties are discussed. The third-order non-resonant nonlinear refractive index (n2) and nonlinear absorption coefficient (β) are measured using the Z-scan technique at 1064 nm in the picosecond regime. The influence of different electron-acceptor groups in azobenzene moieties on the nonlinear properties is investigated.

Near-Field Optical Study of the Third-Order Nonlinear Properties of Polycrystalline Silicon

2000 ◽  
Vol 37 (5) ◽  
pp. 688-692 ◽  
Author(s):  
Yunjin Choi ◽  
June-H. Park ◽  
Myong R. Kim ◽  
Wonho Jhe ◽  
Jin Jang ◽  
...  
Keyword(s):  
Polycrystalline Silicon ◽  
Near Field ◽  
Optical Study ◽  
Third Order ◽  
Nonlinear Properties ◽  
The Third

scholarly journals Synthesis and Third-Order Nonlinear Synergistic Effect of ZrO2/RGO Composites

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2741
Author(s):  
Xinting Zhao ◽  
Fangfang Wang ◽  
Jiawen Wu ◽  
Baohua Zhu ◽  
Yuzong Gu
Keyword(s):  
Graphene Oxide ◽  
Modulation Depth ◽  
Graphene Nanosheets ◽  
Nonlinear Refraction ◽  
Nonlinear Susceptibility ◽  
Zro2 Nanoparticles ◽  
Third Order ◽  
Nonlinear Properties ◽  
The Third ◽  
Nonlinear Modulation

Tuning the third-order nonlinear properties of graphene by hybrid method is of great significance in nonlinear optics research. ZrO2/reduced graphene oxide (RGO) composites with different ZrO2 concentrations were prepared by a simple hydrothermal method. The morphology and structure show that ZrO2 nanoparticles were uniformly dispersed on the surface of graphene nanosheets. The nonlinear optical (NLO) characteristics of composites with different ZrO2 concentrations were studied by the Z-scan technique of 532 nm picosecond pulsed laser. The results showed that ZrO2/RGO composites had saturated absorption and positive nonlinear refraction characteristics. Meanwhile, the third-order nonlinear susceptibility of the ZrO2/RGO composite with a 4:1 mass ratio of ZrO2 to graphene oxide could reach 23.23 × 10−12 esu, which increased tenfold compared to RGO, and the nonlinear modulation depth reached 11.22%. Therefore, the NLO characteristics could be effectively adjusted by controlling the concentration of ZrO2, which lays a foundation for further research on the application of ZrO2/RGO composites in NLO devices.

Probe size and 5th-order aberration

1987 ◽  
Vol 45 ◽  
pp. 134-135 ◽  
Author(s):  
Zhifeng Shao
Keyword(s):  
Electron Probe ◽  
Spherical Aberration ◽  
Wave Length ◽  
Cylindrical Symmetry ◽  
Electron Wave ◽  
Third Order ◽  
The Third ◽  
Probe Radius ◽  
Small Probe ◽  
Probe Size

A small electron probe has many applications in many fields and in the case of the STEM, the probe size essentially determines the ultimate resolution. However, there are many difficulties in obtaining a very small probe.Spherical aberration is one of them and all existing probe forming systems have non-zero spherical aberration. The ultimate probe radius is given byδ = 0.43Csl/4ƛ3/4where ƛ is the electron wave length and it is apparent that δ decreases only slowly with decreasing Cs. Scherzer pointed out that the third order aberration coefficient always has the same sign regardless of the field distribution, provided only that the fields have cylindrical symmetry, are independent of time and no space charge is present. To overcome this problem, he proposed a corrector consisting of octupoles and quadrupoles.

Children’s Recall of Approximations to English

1973 ◽  
Vol 16 (2) ◽  
pp. 201-212 ◽  
Author(s):  
Elizabeth Carrow ◽  
Michael Mauldin
Keyword(s):  
Language Development ◽  
Fourth Order ◽  
Third Order ◽  
Memory Processes ◽  
The Third ◽  
General Index ◽  
General Linguistic

As a general index of language development, the recall of first through fourth order approximations to English was examined in four, five, six, and seven year olds and adults. Data suggested that recall improved with age, and increases in approximation to English were accompanied by increases in recall for six and seven year olds and adults. Recall improved for four and five year olds through the third order but declined at the fourth. The latter finding was attributed to deficits in semantic structures and memory processes in four and five year olds. The former finding was interpreted as an index of the development of general linguistic processes.

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