Frequency Stop Band in an Air-Voided ZnO Photonic Crystal: A Dispersion Diagram Based Design

V. Chaturvedia and M. Kumar Royb aDepartment of Electronics & Communication Engineering, Indian Institute of Information Technology, Design and Manufacturing, Jabalpur, MP, 482001, India bDepartment of Natural Sciences, Indian Institute of Information Technology, Design and Manufacturing, Jabalpur, MP, 482001, India

Received: November 20, 2015

Full Text PDF

Electromagnetic excitation, inside small volumes, results in perturbations which play an important role in the validation of theoretical formulations. Efforts to catch a glimpse of the action inside of the small space, can aid better thin film designs. In the non-linear anisotropic regime the results of such interactions provide important insights into the bulk level behavior of matter. Using this approach, a zinc oxide (ZnO) based photonic crystal is designed with spherical air voids. A Gaussian continuous wave excitation of the refractive index contrast (ZnO=1.9 and Air =1) photon waveguide generated thus, is characterized for the redistribution of electromagnetic field. When, centered at a specific wavelength (1.9 μ m), the graph of the frequencies that can exist inside the crystal, is plotted against the limited k-space vector. The dispersion diagram that emerges shows a band of frequency states that cannot exist inside such a design. Physically this constitutes a k-space which is devoid of any detectable disturbances. Crystallographically, the reduced Brilluoin zone can be used to make a thin layer of ZnO that can act as a frequency stop layer, in a real multilayered photoelectric device.

DOI: 10.12693/APhysPolA.130.683 PACS numbers: 01.65.+g, 01.70.+w, 41.20.Jb, 78.20.-e