Nonlinear fluorescence modulation of an organic dye for optical data storage

Abstract

Most approaches to high-capacity 3D optical data storage (ODS) require confinement of the writing action to a specified depth in the writing medium. This is achieved by a nonlinear photoresponse, usually two-photon absorption, which requires a pulsed long-wavelength source. Fluorescence photobleaching of a dye/polymer composite can be used at a short wavelength to store data at the diffraction limit in a layered storage medium. In this work, the writing response of a bleachable dye/polymer system illuminated with single pulses of various duration obtained from a modulated 405 nm wavelength CW laser was studied. A transition from a linear to nonlinear writing mechanism was observed near the microsecond time scale. Concentration-dependent measurements indicate that a photothermal mechanism accounts for the nonlinear response in the short pulse, higher power regime. This nonlinear response may be useful for realizing terabyte scale ODS in multilayered polymer media.

An Analytical Model to Determine the Optimal System for a Fluorescence Based Multilayered 3D Optical Data Storage System

“…Typically, this is of the order of 250 nm in diameter. Working mechanism of this type of fluorescence based optical data storage has been determined to be photothermal degradation [34,35]. This leads to a threshold response like the commercial ODS media (Blu-Ray and DVD).…”

“…Thermal, physical, and optical properties of polymers that are used in the computations mentioned in this paper are shown in table 1. SAN25 is chosen as the polymer of choice for the active layer because of excellent dye solubility [35]. Polymer properties come from the manufacturers.…”

Novel Simple Cyanine, Carbocyanine, and Dicarbocyanine Dyes: Synthesis, Characterization and Application on Polyester Fabric

“…These dyes can be used in photoghraphy, analytical reagents over a wide pH media, in high energy laser and digital image storage, as indicator for solvent polarity, in biomedical and biological use as molecular probes and as fluorescent dyes for DNA visualization assays. In addition cyanine dyes (Sun et al, 2013;Sha et al, 2018;Christenson et al, 2014) used in high technique such as in optical recording materials. On the other side, cyanine dyes possess a wide range of bioactivities including antimicrobial efficiency, antibacterial agents, antioxidants, anticancer and antitumer agents (Power et al, 2009;Gomaa, 2014;Shindy et al, 2016;Fayez, 2009;Fayez et al, 2015;Badran et al, 2007;Mohareb et al, 2007;Vicini et al, 2002;Mishra et al, 2019;Yong et al, 2009;Rathish et al, 2012).…”