Near-field optical recording on a CdSe nanocrystal thin film

Abstract

We demonstrate an optical recording on a CdSe nanocrystal (NC) thin film by using near-field scanning optical microscopy. Both positive and negative luminescent images were recorded on the CdSe NC thin film by utilizing photoluminescence (PL) enhancement and photobleaching, respectively. Since the PL enhancement is reversible, CdSe NC thin films are exploitable as rewritable optical recording media. On the other hand, CdSe NC thin films can also be used as write-once media when one utilizes photobleaching. The possibility of high-density optical storage on CdSe NC thin film is shown.

Fluorescence Intermittency and Energy Transfer in Small Clusters of Semiconductor Quantum Dots

“…[9][10][11][12][13] QDs have been studied extensively via both ensemble [14][15][16][17] and single-molecule spectroscopic techniques, 4,[18][19][20][21][22][23][24] such that the optical and electronic properties of isolated QDs are reasonably well understood. However, many applications involve coupling QDs to other species, such as fluorophores, 3,[25][26][27] electron donor/acceptors, 8,26,28,29 or other QDs.…”

Plasmonic Color Filters as Dual‐State Nanopixels for High‐Density Microimage Encoding

“…Recent developments in the engineering and manipulation of materials on the nanoscale have given rise to a number of new techniques with the potential for physically encoding data and images into optically readable volumes and surfaces. [23,24] Using semiconductor quantum dots, [25][26][27] graphene, [28] and various super-resolution lithography techniques, [29][30][31][32][33][34] researchers are demonstrating novel 2D and 3D techniques that may enable the next generation of optical storage and encoding technologies. Plasmonic particles and filters have also seen applications in these research areas, with the aforementioned image encoding examples having been joined by demonstrations of their use in optical data storage.…”

The Effect of UV Stabilizer on the Photo Degradation of Perfluoropolyether Lubricants Used in Hard Disk

“…Thermal degradation and photo degradation of perfluoropolyether (PFPE) lubricants are important issues in heatassisted magnetic recording (HAMR) [1][2][3][4] and near field optical recording (NFR) [5,6]. Blue light or ultraviolet (UV) light exposure of hard disks cause thermal degradation as well as photo degradation of the lubricants deposited on the top surface of these disks, resulting in potential failure of the head/disk interface.…”