Two-dimensional photonic crystals with anisotropic unit cells imprinted from poly(dimethylsiloxane) membranes under elastic deformation | Zendy

Xuelian Zhu | Zendy; Ying Zhang | Zendy; D. Chandra | Zendy; Shih-Chieh Cheng | Zendy; James M. Kikkawa | Zendy; Shu Yang | Zendy

Open Access

Two-dimensional photonic crystals with anisotropic unit cells imprinted from poly(dimethylsiloxane) membranes under elastic deformation

Author(s) -

Xuelian Zhu,

Ying Zhang,

D. Chandra,

Shih-Chieh Cheng,

James M. Kikkawa,

Shu Yang

Publication year - 2008

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3006061

Subject(s) - photonic crystal , materials science , symmetry (geometry) , deformation (meteorology) , anisotropy , condensed matter physics , membrane , elastomer , photonics , crystallography , optics , composite material , optoelectronics , physics , chemistry , geometry , biochemistry , mathematics

We study structural symmetries of two-dimensional (2D) photonic crystals with anisotropic unit cells, including square- and rectangular-lattices with orientationally modulated elliptic motifs, and a compound structure consisting of circles with sixfold rotational symmetry and elliptical lines with twofold symmetry, which are created through elastic deformation of a single elastomeric membrane with circular pores. We then investigate the photonic bandgap (PBG) properties of the corresponding 2D Si posts and their tolerance to the structural deviation. We find that in the compound structure the overall PBGs are dominated by the sublattice with a higher symmetry, while the total symmetry is determined by the one with a lower symmetry.

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