Transformation of silver nanospheres embedded in glass to nanodisks using circularly polarized femtosecond pulses

Abstract

We prove by help of optical microspectroscopy that spherical Ag nanoparticles embedded in glass can be transformed to oblate (disklike) shapes by irradiation with circularly polarized femtosecond laser pulses. The symmetry axis (short axis) of the oblate spheroids produced by this method is oriented along the laser propagation direction. This observation also confirms the assumption that the mechanism of shape transformation starts with directed photoionization of nanoparticles induced by laser irradiation in combination with the electric field enhancement at the particle-glass interface.

Controlled Solvent-Free Formation of Embedded PDMS-Derived Carbon Nanodomains with Tunable Fluorescence Using Selective Laser Ablation with A Low-Power CD Laser

“…Moreover, high power lasers can also be used to induce physical or chemical transformations of polymers in a controlled, localised fashion, broadening further the field of potential applications, including biological cell culture in microscaffolds, enabled by superficial laser modification [ 10 ]. In some studies, embedded nanoparticles have been induced or modified in other polymer matrices using lasers, as the local manipulation and structuration of metallic nanodomains has become important for the development of microdevices that would benefit from their optoelectronic properties [ 11 , 12 ]. In the last decade, various allotropes of carbon have become materials under extensive study due to the attractive optical, mechanical and physicochemical properties obtained with a variety of processes for many different applications.…”

Selective modification of nanoparticle arrays by laser-induced self assembly (MONA-LISA): putting control into bottom-up plasmonic nanostructuring

“…[4][5][6][7] Crudely speaking, one might say they correspond to the competing worlds of Physics and Chemistry. It has already been implemented for the reshaping of plasmonic nanoparticles, [8][9][10][11] alloying at the nanoscale 12 and nanomanipulation in optical tweezers. Laser Annealing (LA from now on) might be viewed as the means to a third, intermediate route for nanotechnology manufacturing.…”

Optical Encoding by Plasmon-Based Patterning: Hard and Inorganic Materials Become Photosensitive

“…Although lasers have been previously used to modify PNPs, ,,, the subsequent change of their surrounding environment is a striking observation. This alters drastically our perception of the photosensitivity of inorganic materials, as well as our engineering approach for tailoring the optical performance of PNPs toward LSPR-based optical encoding applications.…”