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Robust detection of deeply subwavelength pits in simulated optical data-storage disks using photonic jets

Appl. Phys. Lett. 92, 211102 (2008); doi:10.1063/1.2936993

Published 28 May 2008

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Soon-Cheol Kong,1 Alan V. Sahakian,1,2 Alexander Heifetz,2 Allen Taflove,1 and Vadim Backman2
1Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, Illinois 60208, USA
2Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, USA
We report a means to detect deeply subwavelength pits in optical data-storage media by employing the recently observed giant backscattering perturbation phenomenon of the photonic jet. We conducted microwave experiments with dimensionally scaled-up pits and lands in a simulated optical data-storage device. These measurements were backed up by three-dimensional finite-difference time-domain computational solutions of Maxwell's equations. Results indicate that pits having a lateral area of 0.025 square wavelengths, i.e., much smaller than current BluRayTM device features, can be robustly detected with a contrast ratio approximately 28  dB greater than that provided by a lens system. ©2008 American Institute of Physics
History: Received 22 January 2008; accepted 5 March 2008; published 28 May 2008
Permalink: http://link.aip.org/link/?APPLAB/92/211102/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.79.Vb
    Optical storage systems, optical disks
  • 85.60.-q
    Optoelectronic devices
  • 42.79.Bh
    Optical lenses, prisms and mirrors
  • 02.70.Bf
    Finite-difference methods
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
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REFERENCES (15)
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