At the next NanoLund Photons meeting, Ivan Scheblykin from Chemical Physics will give a seminar - abstract below.

Welcome! 

Material and technological research in neuromorphic computing has attracted tremendous attention over recent years with numerous examples of memristors – simple electrical synapses. Besides the electrical input and output, light is also used as an input and output signal in optical memristors where light transmission is modulated.

In my talk I will present a new concept of an optical memristor based on photoluminescence recently proposed by us.[1] The new element was named memlumor after memory and luminophore. Photoluminescence quantum yield of a memlumor “remembers” the history of the previous excitations via parameters determining its photophysics and photochemistry. By utilizing metal halide perovskites as a memlumor material platform, we demonstrated the synergetic coexistence of both volatile and non-volatile memory effects within a broad timescale from ns to days. We elucidated the origin of such complex response to be related to the phenomena of photodoping and photochemistry activated by a tunable light input. We anticipate that the memlumor, as a new optical dynamic computing element, will add a new dimension to existing optical technologies enabling their transition into application in photonic neuromorphic computing.

[1] Alexandr Marunchenko, Jitendra Kumar, Alexander Kiligaridis, Shraddha M. Rao, Dmitry Tatarinov, Ivan Matchenya, Elizaveta Sapozhnikova, Ran Ji, Oscar Telschow, Julius Brunner, Anatoly Pushkarev, Yana Vaynzof, Ivan G. Scheblykin (2023) arXiv:2312.09170v1