Controllable decay in an optical waveguide system

The optical waveguide arrays can be employed to simulate the unstable quantum systems when the light propagates in them, which can present the optical Zeno and anti-Zeno effects. In this paper, we propose the scheme of periodic modulation of the coupling coefficient based on the coupling between the straight and cosine bend optical waveguides, which can realize the controllable optical Zeno and anti-Zeno effects. Based on the special decay law, the decay of light intensity in the straight waveguide can be freely controlled by selecting the appropriate observation positions.