Jow-Tsong Shy National Tsing Hua University Department of Physics Hsinchu 300, Taiwan Abstract. A laser with its wavelength stabilized to a Fabry-Perot etalon has many industrial applications. An ideal error signal for laser stabilization is the dispersion-like signal generated without wavelength modulation. We present a technique, by which the error signal is generated by the difference of two...

Recent advances in atomic nanofabrication with laser manipulated atomic beams are discussed with regard to the creation of arbitrary structures.

Laser patterning is a key industrial process in the manufacturing of organic light emitting diode (OLED) displays, solid-state lighting foils and solar cells. Ultrafast lasers are of particular interest for this application as they may enable selective ablative removal of OLED layers with minimal energy density requirements on the target. Since sufficient laser output from commercial laser sour...

Desktop laser plasma acceleration has proven to be able to generate gigaelectronvolt-level quasi-monoenergetic electron beams. Moreover, such electron beams can oscillate transversely (wiggling motion) in the laser-produced plasma bubble/channel and emit collimated ultrashort X-ray flashes known as betatron radiation with photon energy ranging from kiloelectronvolts to megaelectronvolts. This i...

Since the original suggestions of self-trapping for laser beams 1–3 , there has been a growing interest in generation of spatial optical solitons due to their rich nonlinear dynamics, and their potential technological applications 4 . Over the last few decades, spatial optical solitons have been predicted and demonstrated in a variety of physical systems utilizing different nonlinear optical pr...

We present a novel laser-based ion acceleration scheme, where a petawatt circularly polarized laser pulse is shot on an ultra-thin (nano-scale) double-layer target. Our scheme allows the production of high-quality light ion beams with both energy and angular dispersion controllable by the target properties. We show that extraction of all electrons from the target by radiation pressure can lead ...

In a recent experiment at the Trident laser facility, a laser-driven beam of quasimonoenergetic aluminum ions was used to heat solid gold and diamond foils isochorically to 5.5 and 1.7 eV, respectively. Here theoretical calculations are presented that suggest the gold and diamond were heated uniformly by these laser-driven ion beams. According to calculations and SESAME equation-of-state tables...

Table-top laser-plasma ion accelerators have many exciting applications, many of which require ion beams with simultaneous narrow energy spread and high conversion efficiency. However, achieving these requirements has been elusive. Here we report the experimental demonstration of laser-driven ion beams with narrow energy spread and energies up to 18 MeV per nucleon and ∼5% conversion efficiency...

We present a real-time complex amplitude reconstruction method for determining the beam propagation ratio M2 of laser beams based on the transport of intensity equation (TIE). In this work, a synchronous acquisition system consisting of two identical CCDs is established. Once two beam intensity images at different cross-section positions along the optical axis are captured simultaneously by the...

This paper reports on a laser speckle technique based on that which was first developed by Russo [1] to measure surface roughness. The technique has been extended to image surface roughness using laser scanning. A one dimensional laser scan is used with the second dimension required for imaging provided by movement of the surface. The technique uses two orthogonally polarised laser beams at a s...