In this paper, we propose a new design for Mach-Zehnder interferometer with different cross-sectional area than that for conventional silicon waveguide. The structure has a high sensitivity towards the surrounding media as compared to conventional silicon waveguides. This enabled using our design in different applications including optical sensing and modulation.
Ahmad B. Ayoub and Mohamed A. Swillam, "Ultra-sensitive silicon-photonic on-chip sensor using microfabrication technology," Proc. SPIE 10108, Silicon Photonics XII, 1010811 (Presented at SPIE OPTO: February 01, 2017; Published: 20 February 2017); https://doi.org/10.1117/12.2251035.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon