Programmable Multiwavelength Achromatic Focusing and Imaging Through Scattering Media

Optical imaging and focusing through complex samples is a challenge with important applications in many fields. The critical problem is that turbid media such as biological tissue and multimode optical fibers randomly scatter and diffuse light, preventing the formation of diffraction-limited focus and image. We demonstrate with numerical simulations that a multiple scattering can be controlled via a serial optical transmission matrix and a parallel optical transmission matrix in order to obtain an achromatic focus and image at an arbitrary position. Simulation results of three-dimensional achromatic focusing and imaging based on this approach are agreed with the theoretical analysis. A scattering diffuser can be used as functional optical elements for focusing and imaging, moreover it can be manipulated and designed for multifunctional optical elements beyond traditional design. Our method will pave a way for using scattering media as unique optical achromatic elements for various applications, as well as for guiding the light and tailoring the light field.