Nanomaterials can enhance NLO responses due to several factors:
Quantum Confinement: Reduces the dimensionality of the material, leading to enhanced electronic and optical properties. Surface Plasmon Resonance (SPR): Resonant oscillation of conduction electrons at the surface of metallic nanoparticles, enhancing the local electromagnetic field. High Surface Area to Volume Ratio: Increases interaction with the incident light, improving NLO effects.