All-optical logic gates based on hierarchical photonic crystal modulated photoluminescence of perovskite nanocrystals

Halide perovskites exhibit high performance in all sorts of optoelectronic and photonic areas, suggesting their huge potential in integrated photonic devices. However, until now, all optical logic gates based on perovskites are still rarely explored, hindering the development of all-optical networks and computing. Herein, a new concept of all-optical logic gates is proposed based on the modulation of photoluminescence (PL) from perovskite nanocrystals (PNCs). A hierarchical photonic crystal (Hie PhC) is developed by self-assembling polystyrene (PS) and SiO 2 nanoparticles, which exhibit a higher PL enhancement than that of a monolayer PhC. Moreover, the light-controlled PL is realized by taking advantage of the high thermal response of the PL from PNCs/Hie PhC on polyethylene (PE) substrate, assisted by a graphene layer for light-heat conversion. Consequently, optical diode and triode are achieved based on the modulated PL, which exhibit contrast ratios (CR) of 24.7 and 74.0 dB, respectively. All-optical logic gates, including “AND”, “OR” and “NOT”, are realized based on the optical diode and triode.