From Event: SPIE Optical Engineering + Applications, 2017
Even though optical storage has been well heralded as green techniques, the conventional optical memories have been constantly challenged as they reached theirs physical limits imposed by nonlinear effects. Recently, nanophotonics harnesses light’s interaction with materials at the nanoscale including the generation of nanoscale optical probes and the interaction with nanocomposite materials, offering bottom-up new approaches far superior to the conventional technology. In this regard, nanophotonics has emerged as a major propellant for the next generation of ultra-high capacity optical memories for big data. In this talk, we present the recent development of ultra-high capacity optical memories multiplexing information in the physical domain of the writing beams through tailoring the interaction between a tightly focused pulsed laser beam and plasmonic materials . To circumvent the diffraction limit of light discovered by Ernst Abbe, tremendous research approaches have been developed including stimulated emission depletion (STED) microscopy . Through coherently manipulating the distribution of excitons in the fluorophore molecules by a dual-beam approach, where one Gaussian shaped beam can pump the molecules into the excited state while the second doughnut shaped beam can inhibit the subsequent emission through stimulated emission processes, STED microscopy enables superresolved imaging as well as laser lithography [3, 4]. Based on this principle, superresolution optical memories enabled by the dual-beam approach has been demonstrated with an ultra-high equivalent capacity .
Xiangping Li, "Nanophotonics mediated ultra-high capacity optical memory towards big data storage (Conference Presentation)," Proc. SPIE 10384, Optical Data Storage 2017: From New Materials to New Systems, 103840E (Presented at SPIE Optical Engineering + Applications: August 06, 2017; Published: 20 September 2017); https://doi.org/10.1117/12.2275527.5582368160001.
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