Computing photonic bandgap from dispersion relation for TM mode propagation inside metamaterial-based 1D Phc

被引：0

作者：

Deyasi A. ^{[1
]}

Dey U. ^{[2
]}

Das S. ^{[2
]}

De S. ^{[2
]}

Sarkar A. ^{[3
]}

机构：

[1] Department of Electronics and Communication Engineering, RCC Institute of Information Technology, Kolkata

[2] Department of Electronic Science, A.P.C College, Barrackpore

[3] Department of Electronics and Communication Engineering, Kalyani Govt Engg College, Kalyani

来源：

Micro and Nanosystems | 2020年 / 12卷 / 03期

关键词：

Dispersion relation; Double negative index material; Grating structure; Incident angle; Photonic bandgap; TM mode;

D O I：

10.2174/1876402912666200130153324

中图分类号：

学科分类号：

摘要：

Aim: Calculation of dispersion profile and photonic bandgap for negative refractive index based oned-imensional photonic crystal structure. Objective: Determine mathematically the variation of first and second photonic bandgaps under angu-lar incidence variation for the metamaterial-based 1D PhC structure for both TE and TM mode of propagations. Method: Two lowermost photonic bandgap widths of metamaterial-based one-dimensional photonic crystal are analytically computed from the dispersion relation under the propagation of transverse electromagnetic wave along the direction of confinement. Three practically realizable double negative index materials are considered for computation of bandgaps, where air-gaps are considered along with the artificially made materials as the composite grating structure. This is a combination of negative positive indices materials, where incident angles are tailored within practical limit to calculate the variation of bandgaps, which may be quasi or complete depending on the material composition and angle of incidence. Results: Results are compared with that obtained for TE mode propagation, and are highly important for design of the all-optical filter with DNG materials. © 2020 Bentham Science Publishers.

引用

页码：201 / 208

页数：7