1：Experimental Design and Method Selection:

The study involved generating high-order harmonics from laser-produced plasmas containing quantum dots of different metal sulfides using 800-nm and 30-fs pulses. Different approaches were used, including two-color pump, application of alloyed quantum dots, and quasiphase matching of interacting waves.

2：Sample Selection and Data Sources:

Quantum dots of Ag2S, CdS, and Cd0.5Zn0.5S were used. The samples were prepared in the form of plates and ablated in a vacuum chamber to produce laser-produced plasmas.

3：5Zn5S were used. The samples were prepared in the form of plates and ablated in a vacuum chamber to produce laser-produced plasmas. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: The equipment included a femtosecond laser (800 nm, 30 fs, 1 kHz), a nanosecond laser (1064 nm, 5 ns, 10 Hz) for ablation, and an extreme ultraviolet spectrometer for harmonic analysis.

4：Experimental Procedures and Operational Workflow:

The process involved ablation of quantum dot-containing targets to produce plasmas, followed by propagation of femtosecond pulses through the plasmas to generate harmonics. The harmonics were then analyzed using the spectrometer.

5：Data Analysis Methods:

The harmonic spectra were analyzed to study the effects of different experimental conditions on harmonic generation.