A novel optical beam splitter based on photonic crystal with hybrid lattices

doi:10.1088/1674-1056/21/6/064220

Abstract A novel optical beam splitter constructed on the basis of photonic crystal (PC) with hybrid lattices is proposed in this paper. The band gap of square-lattice PC is so designed that the incident light is divided into several branch beams. Triangular-lattice graded-index PCs are combined for focusing each branch. Computational calculations are carried out on the basis of finite-different time-domain algorithm to prove the feasibility of our design. The waveguide is unnecessary in the design. Thus the device has functions of both splitting and focusing beams. Size of the divided beam at site of full-width at half-maximum is of the order of λ/2. The designed splitter has the advantages that it has a small volume and can be integrated by conventional semiconductor manufacturing process.

Keywords: optical beam splitter photonic crystals hybrid lattices finite-different time-domain method

Received: 02 December 2011
Revised: 08 February 2012
Accepted manuscript online:

PACS:	42.70.Qs	(Photonic bandgap materials)
	42.79.Fm	(Reflectors, beam splitters, and deflectors)
	02.70.Bf	(Finite-difference methods)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11079014 and 61077010) and the Fundamental Research Funds for the Central Universities, China (Grant Nos. ZYGX2011YB020 and ZYGX2010J112).

Corresponding Authors: Fu Yong-Qi
E-mail: yqfu@uestc.edu.cn

Cite this article:

Zhu Qing-Yi(朱清溢), Fu Yong-Qi(付永启), Hu De-Qing(胡德清), and Zhang Zhi-Min(章志敏) A novel optical beam splitter based on photonic crystal with hybrid lattices 2012 Chin. Phys. B 21 064220

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