Optically rewritable memory in a graphene-ferroelectric-photovoltaic heterostructure

D. Kundys, A. Cascales, A. S. Makhort, H. Majjad, F. Chevrier, B. Doudin, A. Fedrizzi, B. Kundys

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)
41 Downloads (Pure)


Achieving optical operation of logic elements, especially those that involve two-dimensional (2D) layers, could kick-start the long-awaited era of optical computing. However, efficient optical modulation of the electronic properties of 2D materials, including the rewritable memory effect, is currently lacking. Here we report all-optical control of the conductivity of graphene with write-erase operation yet under ultralow optical fluence. The competition between light-induced charge generation in a ferroelectric-photovoltaic substrate and relaxation processes provides the selective photocarrier-trapping control affecting the doping of the 2D overlayer. These findings open the way to photonic control of 2D devices for all-optical modulators, a variety of all-optical logic circuits, memories, and field-effect transistors.

Original languageEnglish
Article number064034
JournalPhysical Review Applied
Issue number6
Early online date15 Jun 2020
Publication statusPublished - Jun 2020

ASJC Scopus subject areas

  • General Physics and Astronomy


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