Regular Article

Parametric optimization of optical devices based on strong photonic localization

¹ MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P.R. China
² Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510631, P.R. China

^a e-mail: xbyang@scnu.edu.cn

Received: 10 March 2017
Revised: 12 June 2017
Accepted: 14 June 2017
Published online: 21 July 2017

Abstract

Symmetric two-segment-connected triangular defect waveguide networks (STSCTDWNs) can produce strong photonic localization, which is useful for designing highly efficient energy storage devices, high power superluminescent light emitting diodes, all-optical switches, and more. Although STSCTDWNs have been studied in previous works, in this paper we systematically optimize the parameters of STSCTDWNs to further enhance photonic localization so that the function of optical devices based on strong photonic localization can be improved. When optimizing the parameters, we find a linear relationship between the logarithm of photonic localization and the broken degree of networks. Furthermore, the slope and intercept of the linear relationship are larger than previous results. This means that the increasing speed of photonic localization is improved. The largest intensity of photonic localizations can reach 10³⁶, which is 16 orders of magnitude larger than previous reported results. These optimized networks provide practical solutions for all optical devices based on strong photonic localization in the low frequency range, such as nanostructured devices.