The Transmission Spectrum of Symmetrical Structured One-Dimensional Photonic Crystals of Positive and Negative Materials

Abstract:

The transmission spectrum of symmetrically structured one-dimensional photonic crystal (AB)_m(BA)_m consisting of positive and negative materials was studied with transfer matrix method theory. The result shows that a single narrow transmission peak constantly appears at the frequency of uneven ω/ω₀, while a broad transmission peak appears at the frequency of even ω/ω₀. When periodicity m or refractive index n_A of Layer A increase, the narrow transmission peaks in the spectrum become sharper and the broad peaks become narrower; as refractive index n_B of Layer B rises, all the peaks in the spectrum become broader; and when the thickness d_A of Layer A medium thicken, the transmitting peaks move towards alto frequency,while with the thickening of d_B of Layer B medium, these peaks move inversely towards low frequency. Furthermore, in these two circumstances, the transmitting peaks at right alto frequency move faster; however, peaks remain unchanged when both d_A and d_B concurrently thicken. All these optical transmission characteristics of symmetrically structured one-dimensional photonic crystals can offer guidance to designing adjustable super-narrow optical filters, broad band filters and optical switches.

• Periodical: Advanced Materials Research (Volume 904)
• Pages: 67-70
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.904.67
• Online since: March 2014
• Authors: An Su*
• Keywords: Double Negative Material (DNM), Filter, Photonic Crystal (PC), Transmission Spectrum

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