An Optimization of Two-Dimensional Photonic Crystals at Low Refractive Index Material

Abstract

Photonic crystal (PC) is usually realized in materials with high refractive indices contrast to achieve a photonic bandgap (PBG). In this work, we demonstrated an optimization of two-dimensional PCs using a low refractive index polymer material. An original idea of assembly of polymeric multiple rings in a hexagonal configuration allowed us to obtain a circular-like structure with higher symmetry, resulting in a larger PBG at a low refractive index of 1.6. The optical properties of such newly proposed structure are numerically calculated by using finite-difference time-domain (FDTD) method. The proposed structures were realized experimentally by using a direct laser writing technique based on low one-photon absorption method.

3D photonic structures for optoelectronic applications

“…3D PhC structures are more complicated to prepare and currently lithographic techniques based on polymer are mainly used. However, the low contrast of the refractive index of the polymers caused the narrowing of the forbidden bands and their existence is only in local directions, but the diffraction efficiency when using it is sufficient to achieve significant diffraction applications [11,12]. *suslik@fyzika.uniza.sk; In this paper we prepared a new concept of 3D PhCs with high potential for optoelectronics application by modifying their radiation pattern and emission properties.…”

Sonic and Photonic Crystals

“…The gradient cavity, waveguide, switch, and spatial beam filtering with autocloned photonic crystals were studied and discussed [1][2][3][4][5][6]. The metamaterial of crystal structure can be found in [7][8][9][10], and the negative effects of those star-shaped structures were investigated and the applications in those studies were also discussed.…”