Fundamentals aspects of ultrafast laser irradiation of colloidal plasmonic nanoparticles (Conference Presentation)

2019 ◽  
Author(s):  
Michel Meunier
Keyword(s):  
Laser Irradiation ◽  
Ultrafast Laser ◽  
Plasmonic Nanoparticles

scholarly journals The fragmentation mechanism of gold nanoparticles in water under femtosecond laser irradiation

2021 ◽  
Author(s):  
Gabriele Bongiovanni ◽  
Pavel K. Olshin ◽  
Chengcheng Yan ◽  
Jonathan M. Voss ◽  
Marcel Drabbels ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Laser Pulses ◽  
Ultrafast Laser ◽  
Plasmonic Nanoparticles ◽  
Femtosecond Laser Irradiation ◽  
Fragmentation Mechanism ◽  
Ultrafast Laser Pulses

Plasmonic nanoparticles in aqueous solution have long been known to fragment under irradiation with intense ultrafast laser pulses, creating progeny particles with diameters of a few nanometers. However, the mechanism...

scholarly journals Research on the Response Characteristics of Vanadium Pentoxide Film to the Irradiation of Ultrafast Pulsed Laser

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2078
Author(s):  
Qianqian Shi ◽  
Guodong Zhang ◽  
Yuheng Wang ◽  
Yu Lan ◽  
Jiang Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Laser Irradiation ◽  
Vanadium Pentoxide ◽  
Modulation Depth ◽  
Ultrafast Laser ◽  
Stable Phase ◽  
Saturable Absorption ◽  
Third Order ◽  
The Third ◽  
Structural Responses

Vanadium pentoxide (V2O5) is the most stable phase among many transition metal vanadium oxides, and has already been widely used in many fields. In this study, the morphological, structural, and optical responses of V2O5 film to ultrafast laser irradiation was investigated. The third-order nonlinear optical properties of V2O5 film were measured by common Z-scan technique, and the results showed that V2O5 film has self-defocusing and saturable absorption characteristics. The third-order nonlinear absorption coefficient and nonlinear refractive index were calculated to be −338 cm/GW and −3.62 × 10−12 cm2/W, respectively. The tunable saturated absorption with modulation depth ranging from 13.8% to 29.3% was realized through controlling the thickness of vanadium pentoxide film. V2O5 film was irradiated by ultrafast laser with variable pulse energy, and the morphological and structural responses of the V2O5 to the laser with different energy densities were investigated. The irreversible morphological and structural responses of V2O5 films to ultrafast laser irradiation was analyzed using the phase-contrast microscope and Raman spectrum. The chemical structure change from V2O5 to V6O13 was considered the main reason for refractive index modification.

Ablation dynamics of Co/ZnS targets under double pulse femtosecond laser irradiation

2016 ◽  
Vol 18 (5) ◽  
pp. 3522-3529 ◽  
Author(s):  
Ignacio Lopez-Quintas ◽  
Vincent Loriot ◽  
David Ávila ◽  
Jesus G. Izquierdo ◽  
Esther Rebollar ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Laser Irradiation ◽  
Ultrafast Laser ◽  
Double Pulse ◽  
Femtosecond Laser Irradiation ◽  
Pulse Irradiation ◽  
Highly Sensitive ◽  
Ultrafast Laser Pulse

The ablation dynamics of Co/ZnS is highly sensitive to the details of an ultrafast laser pulse irradiation sequence.

Gold Nanoparticles Reshaped by Ultrafast Laser Irradiation Inside a Silica-Based Glass, Studied Through Optical Properties

2012 ◽  
Vol 116 (4) ◽  
pp. 2647-2655 ◽  
Author(s):  
Chaxing Fan ◽  
Bertrand Poumellec ◽  
Huidan Zeng ◽  
Rudy Desmarchelier ◽  
Bernard Bourguignon ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Laser Irradiation ◽  
Ultrafast Laser

Efficient microwelding of glass substrates by ultrafast laser irradiation using a double-pulse train

2011 ◽  
Vol 36 (14) ◽  
pp. 2734 ◽  
Author(s):  
Koji Sugioka ◽  
Makoto Iida ◽  
Hiroshi Takai ◽  
Katsumi Micorikawa
Keyword(s):  
Laser Irradiation ◽  
Pulse Train ◽  
Ultrafast Laser ◽  
Double Pulse ◽  
Glass Substrates
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