The field of nonlinear optics investigates phenomena where the optical response of a material is not directly proportional to the incident light intensity. This nonlinearity manifests in a range of ...

The nonlinear susceptibility is a measure of a material's nonlinear response to an applied electric field. It determines the strength of the nonlinear effects and is related to the crystal's symmetry ...

The recent development in the utilization of flexible optical fiber sensors and the prospective application scenarios were then summarized, which encompass human activity monitoring and healthcare, ...

Photochromic materials, which change color reversibly under light, are essential for applications like smart lenses and ...