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Analysis of an I/O metal grating coupler for organic membrane photonic integrated circuits

We propose organic membrane photonic integrated circuits (OMPICs), which can collectively integrate various optical elements into a thin film and can realize wearable devices and high-speed optical signal processing by making more flexible photonic integrated circuits. In OMPICs, vertical grating couplers are effective as input and output ports. In this study, we propose three types of structure: an SU-8/Cytop grating coupler, a metal grating coupler, and a modified metal grating coupler with a metal mirror and an SU-8/Cytop distributed Bragg reflector. We analyze the optical coupling efficiency in each case.