研究目的
Investigating the resonance enhancement of single harmonic generation in the extreme ultraviolet range from femtosecond pulse interacting with indium plasma.
研究成果
The study demonstrated a significant resonance enhancement of the 13th harmonic in indium plasma, with the harmonic intensity exceeding neighboring harmonics by almost two orders of magnitude. This finding suggests potential applications in generating intense, quasimonochromatic XUV sources.
研究不足
The study is limited by the specific conditions of the indium plasma and the laser parameters used, which may not be universally applicable. The enhancement mechanism's dependency on resonance conditions may restrict its applicability to other materials or wavelengths.
1：Experimental Design and Method Selection:
The study involved the interaction of femtosecond pulses with indium plasma to observe harmonic generation.
2：Sample Selection and Data Sources:
Indium plasma was used as the nonlinear medium.
3：List of Experimental Equipment and Materials:
A chirped-pulse amplification Ti:sapphire laser system, vacuum chamber, spherical lens, off-axis parabolic gold mirror, XUV spectrometer, microchannel plate (MCP) with phosphor screen, and CCD camera.
4：Experimental Procedures and Operational Workflow:
The pump laser was focused on the indium target to produce plasma, followed by focusing a femtosecond main pulse on the plasma to generate harmonics.
5：Data Analysis Methods:
The high-order harmonics were spectrally resolved using an XUV spectrometer and analyzed.
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