1：Experimental Design and Method Selection:

The study involves using femtosecond laser pulses to reshape gold components of hybrid silicon-gold oligomers, with near-field visualization via an aperture-type near-field scanning optical microscope (NSOM) and far-field characterization through dark-field spectroscopy and numerical simulations.

2：Sample Selection and Data Sources:

Hybrid oligomers were fabricated on a quartz substrate with a 200 nm silicon layer and a 20 nm gold layer with a thin Cr sublayer, using e-beam lithography, metal evaporation, lift-off, and inductively coupled plasma etching. Samples were selected based on their resonance in the visible spectral range.

3：List of Experimental Equipment and Materials:

Equipment includes a femtosecond laser system (Avesta Tema 150), acousto-optical modulator (R230803LTD, Gooch and Housego), power meter (FielfMax II, Coherent), autocorrelator (Avesta Project), objective lens (Olympus, NA=0.28), dark-field spectroscopy setup with halogen lamp (Ocean Optics HL-2000-FHSA), spectrometer (Horiba LabRam HR), CCD camera (Andor DU 420A-OE 325), NSOM (AIST-NT SmartSPMT M), supercontinuum laser source (Fianium WhiteLase), tunable filter, and aperture-type near-field probe (Lovalite). Materials include gold, silicon, chromium, and quartz substrates.

4：28), dark-field spectroscopy setup with halogen lamp (Ocean Optics HL-2000-FHSA), spectrometer (Horiba LabRam HR), CCD camera (Andor DU 420A-OE 325), NSOM (AIST-NT SmartSPMT M), supercontinuum laser source (Fianium WhiteLase), tunable filter, and aperture-type near-field probe (Lovalite). Materials include gold, silicon, chromium, and quartz substrates. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Oligomers were irradiated with femtosecond laser pulses at different fluences (1.5, 3, 4.5 mJ cm?2) to reshape gold nanodisks into nanocups. Far-field scattering spectra were measured using dark-field spectroscopy. Near-field maps were obtained with NSOM in constant height mode at 120 nm above the sample, with excitation wavelengths from 600 to 780 nm. Numerical simulations were performed using COMSOL Multiphysics for multipole expansion and scattering cross-sections.

5：5, 3, 5 mJ cm?2) to reshape gold nanodisks into nanocups. Far-field scattering spectra were measured using dark-field spectroscopy. Near-field maps were obtained with NSOM in constant height mode at 120 nm above the sample, with excitation wavelengths from 600 to 780 nm. Numerical simulations were performed using COMSOL Multiphysics for multipole expansion and scattering cross-sections. Data Analysis Methods:

5. Data Analysis Methods: Data analysis included comparing experimental scattering spectra with simulations, multipole decomposition to identify resonant modes, and quantification of near-field enhancement from NSOM maps. Statistical consistency was assessed between experimental and simulated results.