A visible light-triggered artificial photonic nociceptor with adaptive tunability of threshold

摘要: An artificial photonic nociceptor that can accurately emulate the activation of a human visual nociceptive pathway is highly desired for development advanced intelligent optoelectronic information processing systems. However, realization such an device needs sophisticated materials design and pending to date. Herein, we demonstrate visible light-triggered nociceptor, with simple ITO/CeO2-x/Pt sandwich structure, well reproduce pain-perceptual characteristics system. The abundant oxygen vacancies in CeO2-x layer account light activation, notable built-in electric field due work function difference two electrodes enables even self-powered mode. Key characteristics, including threshold, no adaptation, relaxation, sensitization, are realized attributed vacancy-associated electron trapping detrapping processes within layer. More importantly, threshold intensity activate be readily manipulated using sub-1 V external voltage, resembling ambient luminance-dependent tunability This opens up new avenue towards next-generation low-power perceptual systems, as prostheses, eyes, humanoid robots.