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Enhanced image resolution in photonic crystal structure by modification of the surface structure
Author(s): Ashwini Agarwal; Preeti Rani; Yogita Kalra; R. K. Sinha
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Paper Abstract

In this paper, enhanced image resolution by modification in the two dimensional (2-D) photonic crystal structures has been proposed. The equal frequency contour (EFC) analysis have been done using plane wave expansion method which shows that the structure exhibits an effective isotropic refractive index, neff = -1 at a normalized frequency of ω = 0.2908(2πc/a) for TM polarization, located near the second band. At ω = 0.2908(2πc/a) for TM polarization, the considered PhC structure behaves as a superlens, as analyzed using the finite difference time domain (FDTD) method. The image resolution and stability of the photonic crystal slab lens has been enhanced by creating disorder in the top and bottom layer of the PhC structure. The intensity field distributions of the optimized structure exhibit the enhanced image quality with full width at half maximum (FWHM) of 0.311 λ. The proposed structure can also be used to sense the different type of blood constituents.

Paper Details

Date Published: 7 September 2016
PDF: 10 pages
Proc. SPIE 9958, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications X, 99580G (7 September 2016); doi: 10.1117/12.2237767
Show Author Affiliations
Ashwini Agarwal, Delhi Technological Univ. (India)
Preeti Rani, Delhi Technological Univ. (India)
Yogita Kalra, Delhi Technological Univ. (India)
R. K. Sinha, Delhi Technological Univ. (India)
CSIR - Central Scientific Instruments Organisation (India)

Published in SPIE Proceedings Vol. 9958:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications X
Shizhuo Yin; Ruyan Guo, Editor(s)

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