Optical Responses of Gold Nanoparticles Undergoing a Change to Cluster Aggregates and Laser Beam Characteristics Effect

2011 ◽  
Vol 115 (5) ◽  
pp. 1561-1568 ◽  
Author(s):  
M. Nikbakht ◽  
M. H. Mahdieh
Keyword(s):  
Gold Nanoparticles ◽  
Laser Beam ◽  
Optical Responses ◽  
Beam Characteristics

scholarly journals Predicting laser beam characteristics

2012 ◽  
Vol 9 (1) ◽  
pp. 36-39 ◽  
Author(s):  
Chad Nelson ◽  
Jordan Crist
Keyword(s):  
Laser Beam ◽  
Beam Characteristics

Three-mirror cavity with phase anisotropy for control of laser beam characteristics

1992 ◽  
Author(s):  
Vadim Y. Kurochkin ◽  
Victor N. Petrovsky ◽  
Evgeniy D. Protsenko ◽  
Alexander N. Rurukin
Keyword(s):  
Laser Beam ◽  
Phase Anisotropy ◽  
Beam Characteristics

Laser beam characteristics related to the design of a system to improve engraving process

1996 ◽  
Author(s):  
Rafael Estrela ◽  
Jose A. Ramos de Campos ◽  
Juan C. Soriano
Keyword(s):  
Laser Beam ◽  
Beam Characteristics

The influence of the Q-switched and free-running Er:YAG laser beam characteristics on the ablation of root canal dentine

2004 ◽  
Vol 233 (1-4) ◽  
pp. 234-243 ◽  
Author(s):  
Eirini Papagiakoumou ◽  
Dimitrios N Papadopoulos ◽  
Marouan G Khabbaz ◽  
Mersini I Makropoulou ◽  
Alexander A Serafetinides
Keyword(s):  
Laser Beam ◽  
Root Canal ◽  
Er:Yag Laser ◽  
Free Running ◽  
Beam Characteristics

LINEAR AND NONLINEAR OPTICAL PROPERTIES OF GOLD NANOPARTICLES WITH BROKEN SYMMETRY

2006 ◽  
Vol 15 (01) ◽  
pp. 43-53 ◽  
Author(s):  
BRIAN K. CANFIELD ◽  
SAMI KUJALA ◽  
KAISA LAIHO ◽  
KONSTANTINS JEFIMOVS ◽  
TUOMAS VALLIUS ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Electron Beam Lithography ◽  
Nonlinear Optical ◽  
Optical Measurements ◽  
Broken Symmetry ◽  
Nanoparticle Arrays ◽  
Optical Responses ◽  
Optical Generation ◽  
Linear And Nonlinear

We describe our research involving arrays of gold nanoparticles fabricated with electron beam lithography. Small defects in the particles introduced during the fabrication process result in broken design symmetry. The broken symmetry renders the arrays chiral, and signatures of chirality can be observed in both the linear and nonlinear optical responses through precise polarization measurements. The defects enhance the local electric field, enabling more efficient nonlinear optical generation and therefore making nonlinear optical measurements more sensitive to their presence. We also discuss future objectives for clarifying the microscopic processes underlying the optical responses in gold nanoparticle arrays.

scholarly journals Numerical simulation of Ne-like Ar plasma dynamics and laser beam characteristics of 46.9 nm laser excited by capillary discharge

AIP Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 105113
Author(s):  
Muhammad Usman Khan ◽  
Yongpeng Zhao ◽  
Dongdi Zhao ◽  
Huaiyu Cui ◽  
Ziyue Cao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Laser Beam ◽  
Capillary Discharge ◽  
Plasma Dynamics ◽  
Ar Plasma ◽  
Beam Characteristics

scholarly journals Enhancement of optical force acting on vesicles via the binding of gold nanoparticles

2019 ◽  
Vol 6 (5) ◽  
pp. 190293 ◽  
Author(s):  
Yumeki Tani ◽  
Takashi Kaneta
Keyword(s):  
Gold Nanoparticles ◽  
Light Scattering ◽  
Laser Beam ◽  
Binding Constant ◽  
Electrostatic Interactions ◽  
Propagation Direction ◽  
Optical Force ◽  
Surface Charges ◽  
Scattering Force ◽  
The Relationship

Here we found that gold nanoparticles (AuNPs) enhance the optical force acting on vesicles prepared from phospholipids via hydrophobic and electrostatic interactions. A laser beam was introduced into a cuvette filled with a suspension of vesicles and it accelerated them in its propagation direction via a scattering force. The addition of the AuNPs exponentially increased the velocity of the vesicles as their concentration increased, but polystyrene particles had no significant impact on velocity in the presence of AuNPs. To elucidate the mechanism of the increased velocity, the surface charges in the vesicles and the AuNPs were controlled; the surface charges of the vesicles were varied via the use of anionic, cationic and neutral phospholipids, whereas AuNPs with positive and negative charges were synthesized by coating with citrate ion and 4-dimethylaminopyridine, respectively. All vesicles increased the velocity at different degrees depending on the surface charge. The vesicles were accelerated more efficiently when their charges were opposite those of the AuNPs. These results suggested that hydrophobic and electrostatic interactions between the vesicles and the AuNPs enhanced the optical force. By accounting for the binding constant between the vesicles and the AuNPs, we proposed a model for the relationship between the concentration of the AuNPs and the velocity of the vesicles. Consequently, the increased velocity of the vesicles was attributed to the light scattering that was enhanced when AuNPs were adsorbed onto the vesicles.

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