Results 31 to 40 of about 2,043,473 (299)

Nonlinear Optical Studies of Gold Nanoparticle Films

Nanomaterials, 2019
Gold films are widely used for different applications. We present the results of third- and high-order nonlinear optical studies of the thin films fabricated from Au nanoparticle solutions by spin-coating methods.
Anuradha Rout, Ganjaboy S. Boltaev, Rashid A. Ganeev, Yue Fu, Sandeep Kumar Maurya, Vyacheslav V. Kim, Konda Srinivasa Rao, Chunlei Guo   +7 more
doaj   +1 more source

Using Femtosecond Laser Pulses to Explore the Nonlinear Optical Properties of Au NP Colloids That Were Synthesized by Laser Ablation

Nanomaterials, 2022
In this study, we experimentally investigated the nonlinear optical properties of Au nanoparticles (Au NPs) that were prepared in pure distilled water using the laser ablation method.
Mohamed Ashour, Hameed G. Faris, Hanan Ahmed, Samar Mamdouh, Kavintheran Thambiratnam, Tarek Mohamed   +5 more
doaj   +1 more source

Polarization Z-Scan Studies Revealing Plasmon Coupling Enhancement Due to Dimer Formation of Gold Nanoparticles in Nematic Liquid Crystals

Micromachines, 2023
We investigate the plasmon coupling of gold nanoparticle (AuNP) dimers dispersed in a nematic liquid crystal matrix using the polarization z-scan technique.
Shengwei Wang, Edward J. Lipchus, Mohamed Amine Gharbi, Chandra S. Yelleswarapu   +3 more
doaj   +1 more source

Focusing at a Point and Absorption of Nonlinear Oscillations [PDF]

Transactions of the American Mathematical Society, 1995
Several recent papers give rigorous justifications of weakly nonlinear geometric optics. All of them consider oscillating wave trains on domains where focusing phenomena do not exist, either because the space dimension is equal to one, or thanks to a coherence assumption on the phases.
Joly, J. L., Métivier, G., Rauch, J.
openaire   +1 more source

Multi-Foci Laser Separation of Sapphire Wafers with Partial Thickness Scanning

Micromachines, 2022
With multi-foci laser cutting technology for sapphire wafer separation, the entire cross-section is generally scanned with single or multiple passes. This investigation proposes a new separation technique through partial thickness scanning.
Celescia Siew Mun Lye, Zhongke Wang, Yee Cheong Lam   +2 more
doaj   +1 more source

Nonlinear Optical Properties Tuning in Meso-Tetraphenylporphyrin Derivatives Substituted with Donor/Acceptor Groups in Picosecond and Nanosecond Regimes

Molecules, 2015
meso-Tetraphenylporphyrin (TPP) and its two substituted derivatives (meso-tetrakis(4-cyanophenyl)porphyrin [TPP(CN)4] and meso-tetrakis(4-methoxyphenyl)porphyrin [TPP(OMe)4]) were synthesized.
Guanghong Ao, Zhengguo Xiao, Xuemin Qian, Zhongguo Li, Yuxiao Wang, Xueru Zhang, Yinglin Song   +6 more
doaj   +1 more source

Formation of plasmon-exciton nanostructures based on quantum dots and metal nanoparticles with a nonlinear optical response

Конденсированные среды и межфазные границы, 2023
The establishment of the conditions for the formation of nanostructures with plasmon-exciton interaction based onquantum dots and plasmonic nanoparticles that provide unique nonlinear optical properties is an urgent task.
Andrey I. Zvyagin, Tamara A. Chevychelova, Aleksey S. Perepelitsa, Mikhail S. Smirnov, Oleg V. Ovchinnikov   +4 more
doaj   +1 more source

Two-photon absorption and stimulated emission in poly-crystalline Zinc Selenide with femtosecond laser excitation

Opto-Electronic Advances, 2022
The optical nonlinearity in polycrystalline zinc selenide (ZnSe), excited with 775 nm, 1 kHz femtosecond laser pulses was investigated via the nonlinear transmission with material thickness and the Z scan technique.
Qianliang Li, Walter Perrie, Zhaoqing Li, Stuart P Edwardson, Geoff Dearden   +4 more
doaj   +1 more source

The reversing of interfaces in slow diffusion processes with strong absorbtion [PDF]

, 2012
This paper considers a family of one-dimensional nonlinear diffusion equations with absorption. In particular, the solutions that have interfaces that change their direction of propagation are examined.
Foster, J.M., Foster, J, Please, C, Richardson, G., Please, C. P., Fitt, A. D., Richardson, Giles, Richardson, G, Fitt, A, Fitt, A.D., Foster, Jamie, Please, C.P.   +11 more
core   +1 more source

Demonstration of nonlinear absorption in Au semi-continuous film by electrical measurement [PDF]

, 2011
We have demonstrated the nonlinear absorption at 532 nm wavelength in an Au semi-continuous film (SF) resulting from smearing of the Fermi distribution and diffusion of conduction electrons into the substrate.
Ostrikov, K., M. M. A. Yajadda, Yajadda, M. M. A., Farrant, D. I., I. Levchenko, Müller, K. H., K.-H. Müller, K. Ostrikov, Levchenko, I., D. I. Farrant   +9 more
core   +1 more source