Plasmonic data storage medium
with metallic nano-aperture array embedded
in dielectric material

Abstract

We propose a plasmonic data storage medium with a high-transmission metal aperture array embedded in a dielectric material. Bowtie apertures, having an outline of 80 nm and a ridge gap of 30 nm, are arranged in a two dimensional array with a bit pitch of 100 nm and a track pitch of 280 nm. Using the finite differential time domain (FDTD) method, we calculate the exposure power needed to record optical data, the contrast for readability of recorded data, and cross talk between the main track and adjacent tracks. Compared to a conventional blu-ray disc, the exposure power needed to record optical data in the proposed plasmonic data storage medium is less than a quarter of the conventional threshold power, and the density of the data storage is about 1.8 times larger.

Optical Computing Devices Based on Photonic Liquid Crystal Layers

“…Around the 2000s, a search started for searching for a new generation for optical storage which can be introduced as a fourth generation. The main drawbacks of NFPOS technology are the possibility of mechanical failure of the rotating disc and high crosstalk between two adjacent storage cells [39]. In the multilayer recording technology, multiple semitransparent recording layers are used to increase the storage capacity.…”

Tunable Magneto-Optical Kerr Effects of Nanoporous Thin Films

“…Plasmonics 1, 2 preserves varieties of applications in high dimentional data storage 3–8 , high sensitive chemical detection 9–13 , biosensing 14–19 and so forth 20 . This is mainly attributed to the ability of surface plasmons to conduct the subdiffraction-limit of light, to enhance the local surface electromagnetic fields 21 or to allow localization of light at nanoscale dimensions 22 .…”

Novel Plasmonic Data Storage Based on Nematic Liquid Crystal Layers

“…The performance of the NFPOS storage varies from design to another depending on its geometry, materials and dimensions. The main drawbacks of NFPOS technology are the possibility for mechanical failure of the rotating disc, the high crosstalk between relatively close storage cells [6,7] and the numerical aperture (NA) of solid immersion lenses (SIL) which depends on the operating wavelength (λ) and the gap between the detector and the storage. The success for reading the information recorded in the storage device is mainly depending on this gap which is relatively very small [2,8].…”

“…Finally, in the third storage state the two NLC layers are biased, and then the light will be confined and distributed equally between the two nano-holes. The proposed structure with NLC layers offers 13dB crosstalk and solves drawbacks like limited selection, mechanical failure, low bit rates, and crosstalk problems associated with previously storage devices [6,[10][11][12][13]. Further, switching the NLC layer using the regular Frederiks effect involves director reorientation within the timescale of milliseconds and the response time can be accelerated to about 100 nanoseconds using strong field at the order of ~ 106 V/m and thereby using the Frederiks effect, the proposed 2-bit storage may offer minimum writing speed of approximately 10 MB/sec [14].…”