Design and manufacture of an all-polymeric integrated multimode interferometer for visible photonics

  • Gordo F
  • Tátá J
  • Borme J
  • et al.
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Abstract

This work demonstrates an integrated multimode interferometer (MMI) based on a fully polymeric platform and optimized for visible range operation. The dimensions of a 2×2 MMI are first calculated analytically and simulated using finite elements method. The devices are manufactured using two layers of negative tone photoresists. The top layer is patterned by e-beam lithography demonstrating the adaptability of this material, naturally designed to respond to UV radiation. Fabrication tolerance was smaller than 100 nm. Devices were optically characterized with a 635 nm input source and the best performance for a 3 dB power splitter was found at an interferometric cavity dimension of 10.5 × 190.68 µm. Other interferometric lengths were characterized to establish a process design kit that allows future use of this platform in more complex photonic integrated circuits architectures.

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Gordo, F. J., Tátá, J., Borme, J., Geday, M. A., Caño-García, M., & Nieder, J. B. (2022). Design and manufacture of an all-polymeric integrated multimode interferometer for visible photonics. Optics Express, 30(17), 31147. https://doi.org/10.1364/oe.469281

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