Structured Organic-Inorganic Perovskite toward a Distributed Feedback Laser

Abstract

A new strategy for structuring organic?inorganic perovskite materials for optoelectronic applications was studied. By conformally evaporating perovskite onto a nanoimprinted polymer resist, we were able to create a working perovskite distributed feedback (DFB) cavity and to tune the emission between 770 and 793 nm simply by varying the grating periodicity. DFB perovskite cavities have huge potential as inexpensive, mirror free, widely tuneable, single mode lasers that are easy to manufacture on a large scale. The DFB structure is highly versatile and can be optimized, for example, toward lower thresholds or different output energies. Broad tuneability may be achieved by utilizing the various closely related organic?inorganic perovskites and tailoring the cavity to the gain maximum of the unpatterned fi lm. With this approach, continuous tuning of the emission from 1.1 to 3.1 eV should be feasible which has relevance for telecommunication, medicine, and many other applications