Compact triplexer in two-dimensional hexagonal lattice photonic crystals

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2011,（4）
• 页码范围: 87-90
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201109.042501

摘要

We design a compact triplexer based on two-dimensional (2D) hexagonal lattice photonic crystals (PCs).A folded directional coupler (FDC) is introduced in the triplexer beside the point-defect micro-cavities and line-defect waveguides.Because of the reflection feedback of the FDC, high channel drop efficiency can be realized and a compact size with the order of micrometers can be maintained.The proposed device is analyzed using the plane wave expansion method, and its transmission characteristics are calculated using the finite-difference time-domain method.The footprint of the triplexer is about 12×9 μm, and its extinction ratios are less than -20 dB for 1310 nm, approximately -20 dB for 1490 nm, and under -40 dB for 1550 nm, making it a potentially essential device in future fiber-to-the-home networks.