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Pattern manipulation via on-chip phase modulation between orbital angular momentum beams

2015; American Institute of Physics; Volume: 107; Issue: 5 Linguagem: Inglês

10.1063/1.4927758

1520-8842

Huanlu Li, Michael J. Strain, Laura Meriggi, Lifeng Chen, Jiangbo Zhu, Kenan Çiçek, Jianwei Wang, Xinlun Cai, Marc Sorel, Mark G. Thompson, Siyuan Yu,

Metamaterials and Metasurfaces Applications

An integrated approach to thermal modulation of relative phase between two optical vortices with opposite chirality has been demonstrated on a silicon-on-insulator substrate. The device consists of a silicon-integrated optical vortex emitter and a phase controlled 3 dB coupler. The relative phase between two optical vortices can be actively modulated on chip by applying a voltage on the integrated heater. The phase shift is shown to be linearly proportional to applied electrical power, and the rotation angle of the interference pattern is observed to be inversely proportional to topological charge. This scheme can be used in lab-on-chip, communications and sensing applications. It can be intentionally implemented with other modulation elements to achieve more complicated applications.