1：Experimental Design and Method Selection:

The study involves the synthesis of Ag–CdSe hybrid nanostructures using microwave irradiation and subsequent characterization. The nonlinear optical properties are investigated using Open aperture Z-scan Technique with nanosecond pulses.

2：Sample Selection and Data Sources:

Samples are prepared at different growth times (5, 10, 15, 20, and 25 minutes) to study the effect of particle size on optical properties.

3：List of Experimental Equipment and Materials:

Silver Nitrate (AgNO3), Trioctylphosphine (TOP), Selenium powder (Se), Cadmium oxide (CdO), Oleic acid (OAc), Oleylamine (OAm), Ocean Optics USB 2000 spectrometer, JEM-2100 LaB6 electron microscope, 2nd harmonic Nd: YAG laser.

4：Experimental Procedures and Operational Workflow:

Synthesis of Ag nanoparticles, growth of CdSe on Ag seeds, purification, and characterization using UV-Vis absorption, fluorescence spectra, HR-TEM, SAED, and Z-scan measurements.

5：Data Analysis Methods:

The nonlinear absorption coefficient is calculated from Z-scan data, and the imaginary part of third order susceptibility is determined.