Overheating In Silicon During Pulsed-Laser Irradiation?

Optical-Thermal Phenomena in Polycrystalline Silicon MEMS During Laser Irradiation

Pulsed Laser Porosification of Silicon Thin Films

We present a new and simple laser-based process to porosify thin film silicon using a pulsed laser. During deposition, we incorporate gas atoms or molecules into the Si thin film. Pulsed laser radiation of wavelength λ = 532 nm heats up thin film Si beyond its melting point. Upon heating, gas atoms or molecules form nm-sized thermally expanding gas bubbles in the silicon melt, until they explos...

Reshaping the Tips of ZnO Nanowires by Pulsed Laser Irradiation

Vertically aligned ZnO nanowires have been synthesized by a hydrothermal method. After being irradiated by a short laser pulse, the tips of the as-synthesized ZnO nanowires can be tailored into a spherical shape. Transmission electron microscopy revealed that the spherical tip is a single-crystalline piece connected to the body of the ZnO nanowire, and that the center of the sphere is hollow. T...

Simultaneous irradiation and imaging of blood vessels during pulsed laser delivery.

BACKGROUND AND OBJECTIVE Simultaneous irradiation and viewing of 10-120 microm cutaneous blood vessels were performed to investigate the effects of 2-micros 577-nm dye laser pulses. STUDY DESIGN/MATERIALS AND METHODS A modified scanning laser confocal microscope recorded vessel response to different radiant exposures (J/cm2). Probit analysis determined the 50% probability ("threshold") radian...

Photoisomerization of an azobenzene gel by pulsed laser irradiation.

A decalin gel consisting of a 3,3'-bis[{(octylamino)carbonyl}propoxy]azobenzene derivative with H-aggregation showed a photon-density dependent E-Z isomerization, indicating the cooperating isomerization of each module.