Plasmon‐Assisted Self‐Encrypted All‐Optical Memory

Abstract

All-optical responsive nanomaterials, which can rapidly switch between two stable states, have been regarded as the next-generation memories due to their potential to realize binary information storage and implement on-chip, integrated photonic neuromorphic systems. Rare earth oxides are preeminent candidates owing to their extraordinary luminescent stability and narrow optical transitions. However, due to the lack of simple and effective optical switches, it is difficult to realize all-optical data storage, encoding, and retrieval by pure rare earth-doped luminescent nanoparticles. Here, a rapid and high-contrast of 10 4 luminescent switching of Y 2 O 3 :Eu 3+ nanoparticle between the enhancement and quenching states is achieved by employing the strong light confinement and ultrafast thermal response of localized surface plasmon resonance. A self-encrypted all-optical memory is presented with optical information writing, encryption, reading, and re-writing, and a high-sensitivity synaptic response of emitters to frequency and light intensity flux, which can be harnessed to encrypt information flows and promote convenient and high-security information encryption. Such a convenient and secure plasmonic thermally assisted self-encrypting luminescent switch paves the way for constructing high-performance stimuli-responsive rare earth oxide crystals on demand and expanding their applications in various data encryption, anti-counterfeiting, and rewritable colouration devices.

High-Density, Nonvolatile, Flexible Multilevel Organic Memristor Using Multilayered Polymer Semiconductors

“…These devices are energy efficient and offer a faster access time by accessing multiple states simultaneously. Literature shows the different mechanisms, encompassing redox-driven switching, , filament formation processes, , and the utilization of optically responsive materials − for charge storage. These storage techniques have challenges related to material degradation over time (in redox-driven switching), inconsistent and unpredictable storage (in filament-driven switching), and the complexity and availability of the photosensitive material (in optically responsive switching).…”

Silver ions induced growth of plasmonic Au hexagonal star plates

“…Owing to its tips and edges, the Au plate can generate clear electromagnetic field enhancements. 33 However, only a few morphologies of Au plates have been reported: triangles and hexagons. The limitation of the lack of effective synthetic methods for producing Au plates with more sharp corners hinders further studies on their properties and applications in nanophononics.…”

Multiphysical Field Modulated VO2 Device for Information Encryption

“…With the development of information technology, information security is one of the key issues in the fields of politics, military, economy, and daily life, which makes the information encryption/decryption technology extremely important and attracts wide attention. [1][2][3][4] The commonly used information DOI: 10.1002/advs.202300908 security techniques include watermarking, [5,6] security inks, [7][8][9] fluorescent identification, [10,11] and graphical barcodes. [12,13] While currently, materials that respond to external chemical and physical stimuli show great application prospects in information encryption technology.…”