Photonic crystal slabs based on 2D lattices with complete gaps in TE and TM polarizations

Cazimir G. Bostan; Paul Şchiopu; Oana Miţă

doi:10.1117/12.882051

3 December 2010 Photonic crystal slabs based on 2D lattices with complete gaps in TE and TM polarizations

Cazimir G. Bostan, Paul Şchiopu, Oana Miţă

Proceedings Volume 7821, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies V; 78210A (2010) https://doi.org/10.1117/12.882051
Event: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies, 2010, Constanta, Romania

Abstract

Two different designs of 2D photonic crystal lattices that exhibit large complete photonic band gaps have been recently proposed [1] : (1) honey-comb lattice with two different hole radii; (2) "tri-ellipse" pattern in a triangular lattice. We perform a full 3D analysis of guided and leaky modes in vertically symmetric slabs based on these lattices. Guided modes are obtained through the plane-wave expansion method (PWEM) with a vertical supercell. Leaky modes are obtained through a finite difference time domain (FDTD) analysis with a combination of Bloch and perfectly matched layers boundary conditions. The analysis is carried out for both even and odd modes with respect to the plane bisecting the slab. It turns out that the classical 2D effective index method predicts a false bandgap in odd modes for high-indexcontrast photonic crystal slabs studied here.

Citation Download Citation

Cazimir G. Bostan, Paul Şchiopu, and Oana Miţă "Photonic crystal slabs based on 2D lattices with complete gaps in TE and TM polarizations", Proc. SPIE 7821, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies V, 78210A (3 December 2010); https://doi.org/10.1117/12.882051

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KEYWORDS

Finite-difference time-domain method

Photonic crystals

Dielectrics

Silicon

Dielectric polarization

Cladding

Photon polarization

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