KeV High Harmonic Generation Enhanced by Mid-IR Surface Plasmon
Abstract
Effects of enhancement of short-wavelength infrared intense laser field in a single micrometer-scale metal funnel were observed for the first time in harmonic generation experiments. Low-order harmonics were generated by interesting 32-femtosecond pulses centered at 2.2-micron wavelength with gases in the funnel. The driving laser was an optical parametric amplifier operating at 60-kilohertz repetition rate. When the peak intensity of the laser beam at the entry of the funnel reached 9.1 terawatt (TW) per square centimeter, third harmonic signals were detected with an estimated enhancement factor of 6.2. At a higher intensity, 49 TW per square centimeter, the enhancement of the fifth harmonic was demonstrated. The results paved the way for generating high-order harmonics at high repetition rate with microjoule-level driving lasers.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 2023
- Accession Number
- AD1219585
Entities
People
- Paul Corkum
- Zenghu Chang
Organizations
- University of Central Florida