Herbert Walther

TL;DR: In this article, a supersonic beam of NO molecules was scattered from a Pt(111) surface either clean or covered with NO, C, and O. Rotational state populations and angular distributions of the scattered molecules were determined at two incident energies and at different surface temperatures.

TL;DR: In this paper, a single laser femtosecond optical frequency synthesizer together with a widely tunable Nd:YAG laser was used to measure the absolute frequency of several absorption lines in molecular iodine around 532 nm.

TL;DR: In this paper, a single calcium ion coupled with a high-finesse cavity is presented as an almost ideal system for the controlled generation of single photons, where photons from a pump beam are Raman-scattered by the ion into the cavity mode, which subsequently emits the photon into a well-defined output channel.

TL;DR: Rescattering effects in above-threshold ionization such that the electron is driven back to the ionic core by the laser field and rescatters are considered in a completely classical framework for a laser field consisting of a linearly polarized monochromatic fundamental and its second harmonic.

TL;DR: In this paper, a scanning tunneling microscope (STM) with laser radiation coupled into the tip of the tunneling junction is demonstrated, where the dc current generated by rectifying the laser light and the difference-frequency signal produced in the STM by two laser beams is used to obtain atomic-resolution surface images of graphite, as well as to control the tip-sample distance.