Theoretical and experimental investigations on the photothermal effect of gold nanorods irradiated by femtosecond and nanosecond laser

Nanoparticle-mediated laser-induced breakdown (LIB) can be used for Nanoparticle synthesis, cell nanosurgery and laser-induced breakdown spectroscopy (LIBS). To investigate the photo-thermal conversion of gold nanoparticles during pulsed laser irradiation, the electron-phonon two-temperature model was established in this study. The impact of laser energy density and pulse width on the thermal conversion and morphology change of gold nanorods were investigated and compared with experimental observations. The results show that the melting threshold of gold nanorods under nanosecond laser irradiation is about twenty times that of femtosecond laser irradiation. The mechanisms of nanorod fragmentation are different between fem to and nanosecond laser irradiation: particle melting is more likely to occur in nanosecond laser irradiation, while the Coulomb explosion is highly likely to occur in femtosecond laser irradiation.

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Using Femtosecond Laser Irradiation To Grow the Belly of Gold Nanorods

The Journal of Physical Chemistry C ◽

10.1021/acs.jpcc.8b06375 ◽

2018 ◽

Vol 122 (34) ◽

pp. 19816-19822 ◽

Cited By ~ 7

Author(s):

Pablo Díaz-Núñez ◽

Guillermo González-Rubio ◽

Alejandro Prada ◽

Jesús González Izquierdo ◽

Antonio Rivera ◽

...

Keyword(s):

Femtosecond Laser ◽

Laser Irradiation ◽

Gold Nanorods ◽

Femtosecond Laser Irradiation

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Application of Femtosecond-Laser Induced Nanostructures in Optical Memory

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.18008 ◽

2007 ◽

Vol 7 (1) ◽

pp. 94-104 ◽

Cited By ~ 17

Author(s):

Yasuhiko Shimotsuma ◽

Masaaki Sakakura ◽

Kiyotaka Miura ◽

Jiarong Qiu ◽

Peter G. Kazansky ◽

...

Keyword(s):

Femtosecond Laser ◽

Laser Irradiation ◽

Acoustic Waves ◽

Pressure Wave ◽

Optical Data Storage ◽

Femtosecond Laser Irradiation ◽

Optical Data ◽

Photothermal Effect ◽

Soda Lime Glass ◽

Longitudinal Sound Velocity

The femtosecond laser induced micro- and nanostructures for the application to the three-dimensional optical data storage are investigated. We have observed the increase of refractive index due to local densification and atomic defect generation, and demonstrated the real time observation of photothermal effect after the femtosecond laser irradiation inside a glass by the transient lens (TrL) method. The TrL signal showed a damped oscillation with about an 800 ps period. The essential feature of the oscillation can be reproduced by the pressure wave creation and propagation to the outward direction from the irradiated region. The simulation based on elastodynamics has shown that a large thermoelastic stress is relaxed by the generation of the pressure wave. In the case of soda-lime glass, the velocity of the pressure wave is almost same as the longitudinal sound velocity at room temperature (5.8 μm/ns). We have also observed the localized photo-reduction of Sm3+ to Sm2+ inside a transparent and colorless Sm3+-doped borate glass. Photoluminescence spectra showed that some the Sm3+ ions in the focal spot within the glass sample were reduced to Sm2+ ions after femtosecond laser irradiation. A photo-reduction bit of 200 nm in three-dimensions can be recorded with a femtosecond laser and readout clearly by detecting the fluorescence excited by Ar+ laser (λ = 488 nm). A photo-reduction bit can be also erased by photo-oxidation with a cw Ar+ laser (λ = 514 5 nm). Since photo-reduction bits can be spaced 150 nm apart in a layer within glass, a memory capacity of as high as 1 Tbit can be achieved in a glass piece with dimensions of 10 mm × 10 mm × 1 mm. We have also demonstrated the first observation of the polarization-dependent periodic nanostructure formation by the interference between femtosecond laser light and electron acoustic waves. The observed nanostructures are the smallest embedded structures ever created by light. The period of self-organized nanostructures can be controlled from ∼140 to 320 nm by the pulse energy and the number of irradiated pulses. Furthermore, we have also observed the self-assembled sub-wavelength periodic structures created in silica glass by femtosecond pulses on the plane of the propagation of light.

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3D Characterization and Plasmon Mapping of Gold Nanorods Welded by Femtosecond Laser Irradiation

ACS Nano ◽

10.1021/acsnano.0c02610 ◽

2020 ◽

Vol 14 (10) ◽

pp. 12558-12570

Author(s):

Thaís Milagres de Oliveira ◽

Wiebke Albrecht ◽

Guillermo González-Rubio ◽

Thomas Altantzis ◽

Ivan Pedro Lobato Hoyos ◽

...

Keyword(s):

Femtosecond Laser ◽

Laser Irradiation ◽

Gold Nanorods ◽

Femtosecond Laser Irradiation

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Transient Absorption of Gold Nanorods Induced by Femtosecond Laser Irradiation

Ukrainian Journal of Physics ◽

10.15407/ujpe59.03.0331 ◽

2014 ◽

Vol 59 (3) ◽

pp. 331-335

Author(s):

Y. Shynkarenko ◽

◽

A. Dmytruk ◽

I. Dmitruk ◽

I. Blonskyi ◽

...

Keyword(s):

Femtosecond Laser ◽

Laser Irradiation ◽

Gold Nanorods ◽

Transient Absorption ◽

Femtosecond Laser Irradiation

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Pd nanoparticles formation by femtosecond laser irradiation and the nonlinear optical properties at 532 nm using nanosecond laser pulses

Journal of Applied Physics ◽

10.1063/1.3533738 ◽

2011 ◽

Vol 109 (2) ◽

pp. 023102 ◽

Cited By ~ 32

Author(s):

Guanghua Fan ◽

Shiliang Qu ◽

Qiang Wang ◽

Chongjun Zhao ◽

Lei Zhang ◽

...

Keyword(s):

Optical Properties ◽

Femtosecond Laser ◽

Laser Irradiation ◽

Nonlinear Optical ◽

Laser Pulses ◽

Pd Nanoparticles ◽

Femtosecond Laser Irradiation ◽

Nanosecond Laser ◽

Nanosecond Laser Pulses ◽

532 Nm

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Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

The European Physical Journal Applied Physics ◽

10.1051/epjap/2020200258 ◽

2020 ◽

Vol 92 (2) ◽

pp. 20701

Author(s):

Bo Li ◽

Xiaofeng Li ◽

Zhifeng Zhu ◽

Qiang Gao

Keyword(s):

Femtosecond Laser ◽

Spatial Resolution ◽

Laser Induced Breakdown Spectroscopy ◽

Nanosecond Laser ◽

Breakdown Threshold ◽

Powerful Technique ◽

Breakdown Spectroscopy ◽

Continuous Radiation ◽

Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

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