Lecture
This lecture covers optical methods in chemistry, focusing on materials properties and applications. Topics include electromagnetic waves in dielectric media, optical constants of various materials, dispersion, second and third-order non-linear optics, and self-focusing phenomena. The instructor discusses the Kramers-Kronig relation, susceptibility in different media, and examples of second and third harmonic generation. Additionally, the lecture explores optical parametric devices, the optical Kerr effect, and self-phase modulation. The session concludes with a detailed explanation of the relationship between polarization density and electric field in non-linear optics.