Abstract-Self-imaging effect in photonic quasicrystal waveguides: Application to 3 dB power splitter for terahertz waves

• Feixiang Xu^a, b, 
• Qiushun Zou^a, 
• Quancheng Zhou^a, 
• Tongbiao Wang^a, 
• Tianbao Yu^a, , 
• Nianhua Liu^a, b

• ^a Department of Physics, Nanchang University, Nanchang 330031, China
• ^b Institute for Advanced study, Nanchang University, Nanchang 330031, China

Received 19 November 2015, Revised 12 January 2016, Accepted 13 January 2016, Available online 4 February 2016

http://www.sciencedirect.com/science/article/pii/S0030401816300359

We report that self-imaging effect still can be achieved in photonic quasicrystal waveguides (PtQCWs) just as it does in photonic crystal waveguides. As a possible application of the results, a new kind of compact 3 dB PtQCWs-based power splitters based on this effect for terahertz waves with symmetric interference is presented and analyzed. The finite element method is used to calculate the distributions of stable-state electric field and evaluate transmission efficiency of these structures. The calculated results show that the proposed device provides a new compact model for exporting efficiently THz wave with a broad bandwidth to two channels averagely and can be extended to new designs of PtQCW devices.