title: An upconverted photonic nonvolatile memory.
abstract: Conventional flash memory devices are voltage driven and found to be unsafe for confidential data storage. To ensure the security of the stored data, there is a strong demand for developing novel nonvolatile memory technology for data encryption. Here we show a photonic flash memory device, based on upconversion nanocrystals, which is light driven with a particular narrow width of wavelength in addition to voltage bias. With the help of near-infrared light, we successfully manipulate the multilevel data storage of the flash memory device. These upconverted photonic flash memory devices exhibit high ON/OFF ratio, long retention time and excellent rewritable characteristics.
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China.
authors.forename: Su-Ting
authors.initials: ST
authors.lastname: Han
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China.
authors.forename: Xian
authors.initials: X
authors.lastname: Chen
authors.affiliation: 1] Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China [2] Shenzhen Research Institute, City University of Hong Kong, High-Tech Zone, Nanshan District, Shenzhen 518057, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.affiliation: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
authors.forename: Yong-Bing
authors.initials: YB
authors.lastname: Tang
authors.affiliation: 1] Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China [2] Shenzhen Research Institute, City University of Hong Kong, High-Tech Zone, Nanshan District, Shenzhen 518057, China [3] Center of Super-Diamond and Advanced Films, and State Key Laboratory of Millimeter Waves, City University of Hong Kong, Hong Kong, China.
authors.forename: V A L
authors.initials: VA
authors.lastname: Roy