Michelson interferometer in a 2D photonic crystal utilizing self-collimation effect

Xiyao Chen; Yishen Qiu; Yufei Wang; Nan Lin; Guimin Lin; Hailian Hong; Bo Ni

doi:10.1117/12.757644

28 November 2007 Michelson interferometer in a 2D photonic crystal utilizing self-collimation effect

Xiyao Chen, Yishen Qiu, Yufei Wang, Nan Lin, Guimin Lin, Hailian Hong, Bo Ni

Proceedings Volume 6834, Optical Design and Testing III; 68343I (2007) https://doi.org/10.1117/12.757644
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

A Michelson interferometer (MI) constructed in a two-dimensional photonic crystal (2D PhC) utilizing self-collimation effect is proposed and investigated theoretically. The 2D PhC consists of a square lattice of air holes in silicon. It has square-shaped equal frequency contours (EFCs) in the frequency range of 0.26-0.275c/a for TE modes. The MI proposed consists of two PhC mirrors and one defect-row splitter. Light propagates between them employing self-collimation effect. The two interferometer branches have different path lengths L₁ and L₂. The FDTD calculation results show that the transmission spectrum from 0.26c/a to 0.275c/a at the MI output port is comb-shaped. The transmission peaks have a uniform spacing. Moreover, the peaks shift to the lower frequencies and the peak spacing decreases when the difference between L₁ and L₂ is increased. For the operating wavelength around 1550nm, the dimensions of this MI are only tens of microns. So this PhC Michelson interferometer may be applied in future photonic integrated circuits.

Citation Download Citation

Xiyao Chen, Yishen Qiu, Yufei Wang, Nan Lin, Guimin Lin, Hailian Hong, and Bo Ni "Michelson interferometer in a 2D photonic crystal utilizing self-collimation effect", Proc. SPIE 6834, Optical Design and Testing III, 68343I (28 November 2007); https://doi.org/10.1117/12.757644

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