Halide Perovskite Amplifiers Integrated in Polymer Waveguides

Semiconductor organometallic halide perovskites (CH3NH3PbX3, X=Cl, Br, I) (HPVK) have emerged as a new promising material able to improve the optoelectronic technology performance. Although this material has mostly been applied to improve the efficiency of photovoltaic devices, it also shows amazing properties for photonic applications. In particular, HPVK exhibits high photoluminescence (PL) quantum yield (up to 70%) at room temperature together with a tunable band-gap controlled by its chemical composition. In addition, since HPVKs is deposited in solution at room conditions, it can be easily incorporated in different photonic structures to efficiently exploit its emission properties to demonstrate laser or amplification of the spontaneous emission (ASE). Among the different optical architectures, here we propose the integration of HPVK layers into a polymer waveguide to construct an integrated optical amplifier. By optimizing the geometrical parameters, it is possible to generate stimulated emission by optically pumping the structure with nanosecond pulses propagated along the waveguide. As a result, optical gain is demonstrated with a threshold of 2 nJ, and a linewidth of 3-4 nm.