Optical Wavefront Engineering of Perovskite Light Emission by Metastructures

The demand for programmable, low-cost, compact and multifunctional lighting sources is critical for the advances of next-generation optoelectronic devices. Among light-emitting materials, halide perovskites materials have gained tremendous attention in recent years in a wide range of applications, such as high-efficient solar cells, light emitting diodes (LEDs), and lasers, due to their exotic properties such as long-carrier diffusion length, low defect density and controllable bandgaps, low-cost and easy processing, and high photoluminescence quantum yield. However, direct control of light emission pattern has not yet been explored. In this thesis research, direct control of light emission from MAPbI3 lead halide perovskite using dielectric metasurfaces is experimentally investigated. Several devices, including perovskite directional emitter, perovskite self-focusing lens, and perovskite vortex beam generator, are verified through numerical simulations. Experimentally, a perovskite directional emitter device is fabricated and measured through optical measurements. The direct and on-demand perovskite light emission pattern control will facilitates its broader applications in light raging, directional LED, self-focusing perovskite lens, beam steering, and free-space optical communications, etc