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ABDOLRASOUL GHARAATI1,* , NAJMEH FATHI1
The study reported in this article examine the negative refraction of the electromagnetic wave in two-dimensional (2D) triangular lattices graded photonic crystal (GPC) with elliptical cross-section rods (ECSRs). The graded photonic crystal will be obtained by varying the major and minor half axis of the ECSRs in each row. Further, a good quality image, with a relative refractive index of -1, has been observed in this system for transverse electric (TE) polarization. The result suggests that the super-resolution imaging of the point source can be realized by the designed GPC in the second band. Finally, the resolution of the image is compared in different ECSRs elongations and different frequencies in this GPC.
Graded photonic crystal, Negative effective refractive index, Superlens, Band structures, Equifrequency contours, Finite difference time domain method.
ABDOLRASOUL GHARAATI, NAJMEH FATHI, Enhancement of resolution imaging of a flat graded photonic crystal lens using negative refractive index, Optoelectronics and Advanced Materials - Rapid Communications, 15, 11-12, November-December 2021, pp.572-577 (2021).
Submitted at: June 2, 2021
Accepted at: Nov. 24, 2021
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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