Analysis of near-field method for optical data storage using microstrip probe under illumination and illumination-collection mode

Yevhenii Morozov; Andriy A. Kryuchyn; Viacheslav V. Petrov; Anatoliy S. Lapchuk

doi:10.1117/12.2060793

5 September 2014 Analysis of near-field method for optical data storage using microstrip probe under illumination and illumination-collection mode

Yevhenii Morozov, Andriy A. Kryuchyn, Viacheslav V. Petrov, Anatoliy S. Lapchuk

Author Affiliations +

Proceedings Volume 9201, Optical Data Storage 2014; 920111 (2014) https://doi.org/10.1117/12.2060793
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

Results of numerical simulation of near-field optical data storage using microstrip probe are presented. Simulation is carried out on the basis of the finite-difference time-domain method. Features of the information reading process from the ROM and RW (based on the phase transmissions of Ge₂Sb₂Te₅ film) formats of optical discs under illumination and illumination-collection mode are analyzed and considered. Mathematical modeling has shown that the signal from the ROM-format disc under illumination mode, despite the fact that the probe has a significant far-field transmission coefficient, has a large crosstalk and small spatial resolution (significantly worse than a size of probe aperture). Unlike illumination mode, signal under illumination-collection mode (pure near-field method) has a resolution close to the size of the aperture, good amplitude and contrast, as well as relatively low crosstalk. However, information reading under illumination-collection mode from RW-format disc is not able to get the same good quality signal. Therefore the further optimization of the method is required to improve the signal quality of RW format.

Citation Download Citation

Yevhenii Morozov, Andriy A. Kryuchyn, Viacheslav V. Petrov, and Anatoliy S. Lapchuk "Analysis of near-field method for optical data storage using microstrip probe under illumination and illumination-collection mode", Proc. SPIE 9201, Optical Data Storage 2014, 920111 (5 September 2014); https://doi.org/10.1117/12.2060793

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