ultrashort laser
Research Topic
Language: English
This is a research topic created to provide authors with a place to attach new problem publications.
Research problems linked to this topic
- A requirement for high power free electron lasers (FEL) is a high current, high quality electron beam.
- Femtosecond laser microfabrication attracts much attention due to its ability to write three-dimensional photonic devices into various transparent materials.
- Despite much recent progress in developing ultrafast laser systems with pulse duration less than 25 fs in the near-infrared, many applications in solid state physics, surface science, biophysics, and chemistry require ultrafast pulses with energies >μJ in the ultraviolet (UV). In the past, third harmonic generation (THG) by sum-frequency mixingin nonlinear crystals has been used to generate light in the deep ultraviolet. While this technique can result in conversion efficiencies of several percent, it suffers from pulse broadening due to group velocity walkoff in the medium. The resulting pulse duration of 200 fs is too long to monitor reaction dynamics in many cases, particularly in small molecules and organic species.
- The interaction between femtosecond laser (fs-laser) and silicon carbide (SiC) is complex, and it will form various modified surface structures related to the physical phenomena of melting, evaporation and plasma.