Polychromatic and polarized multilevel optical data storage

Abstract

The combination of multiplexing among multiple physical dimensions and multilevel coding simultaneously can boost the capacity of ODS.

Reversible Mn valence state switching in submicron α-Al2O3:Mn by soft X-rays and blue light – a potential pathway towards multilevel optical data storage

“…Multilevel data storage is based on varying the energy deposited on the material. 5 Previous research into multilevel encoding has focused on polymers using two-photon excitation, 5–7 nanorods, 8 as well as nanocrystals. 2–4 Dye-doped polymers permitted a limited number of levels of encoding and low degrees of linearity.…”

Organic photoresponsive materials for information storage: a review

“…Photoresponsive polymer-based self-assembly has various construction strategies. Based on the host-guest-driven selfassembly strategy, Wang and coworkers prepared a series of photoresponsive supramolecular nanoparticles as security inks for anticounterfeiting, including water-soluble pillar [5]arene as the host, three conjugated polyfluorene derivatives 71 to 73 (Fig. S2 in the Supplemental Materials) with RGB emission as the guests.…”

“…Among them, optical information storage exhibits the merits of low cost, fast speed, long lifetime, easy portability, high storage density, and low power consumption, becoming an important information storage technology and being widely applied in many fields, including daily life, economy, military, etc. [3][4][5][6] Photoresponsive materials can well realize information recording and readout because they can undergo a series of reversible changes in certain physical and chemical properties in response to light stimulus, which are specifically manifested as variations in optical properties (absorption and emission), solubility, viscosity, conformation, polarity, electrochemical properties, conductivity, refractive index, etc. 7,8 Among these variations, optical properties play a decisive role in information storage because the success of information (re)writing and erasing, encryption and decryption, and anti-counterfeiting is directly judged by the change in the color and/or luminescent color of photoresponsive materials.…”

Reversible multiplexing for optical information recording, erasing, and reading-out in photochromic BaMgSiO4:Bi3+ luminescence ceramics

“…These "off" and "on" characteristics of photochromism promote the potential applications in many fields such as high-density optical memory and optical switches [21][22][23][24][25][26]. Moreover, the photochromic property was dependent on the time of light stimulation, facilitating multiplexed encoding [27][28][29]. Thus, the information-storage capacity could be improved based on the photochromic reaction.…”