Phys.org November 8, 2024 Bubble printing is a patterning method in which particles are accumulated by the convection of bubbles generated by laser focusing that enables the high-speed, high-precision patterning of various micro/nanoparticles. It is used for metallic particles and organic particles for patterning solid particles and not on the patterning of liquid particles. Researchers in Japan fabricated liquid metal wiring patterns using a bubble printing method in which eutectic gallium‒indium alloy (EGaIn) colloidal particles were fixed on a glass substrate by generating microbubbles by focusing a femtosecond laser beam on the EGaIn colloidal particles. They made the wiring conductive […]
Tag Archives: Femtosecond laser
The forbidden propagation of hyperbolic phonon polaritons and applications in near-field energy transport
Phys.org July 8, 2024 GHz burst-mode femtosecond (fs) laser provides distinct characteristics in materials processing as compared with the conventional irradiation scheme of fs laser (single-pulse mode). Researchers in Japan used the moderate pulse interval of 205 ps in the burst pulse for high-quality and high-efficiency micromachining of single crystalline sapphire by laser induced plasma assisted ablation (LIPAA). The preceding pulses in the burst generated plasma by ablation of copper placed behind the sapphire substrate, which interacted with the subsequent pulses to induce ablation at the rear surface of sapphire substrates. The ablation quality, efficiency, and the fabrication resolution were […]