Abstract
This study is performed to investigate the temperature sensitivity of SU-8-based triple-arm Mach–Zehnder interferometer (MZI) and straight waveguide. The proposed SU-8 2000-based rib waveguides are fabricated on a silicon wafer with 1.5-μm SiO2 thermal oxide layer. SU-8 layer of desired thickness is spin-coated onto the silicon wafer followed by patterning of the SU-8 waveguides. Temperature sensitivity of both waveguides is evaluated using the same heating source and under the same environmental conditions. Measurement results show that complex triple-arm MZI having different arm lengths offers a less linear sensitivity compared to the simple straight waveguide.
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SU-8 (may stands for Substrate with 8 epoxy) photoresist series are negative tones, epoxy-type photoresists based on EPON™ SU-8 (also called EPIKOTE™ 157) epoxy resins from Hexion Specialty Chemicals, Inc. (Columbus, OH, 43215, USA), and originally developed and patented by IBM. It is commercially available from MicroChem Corp. (Newton, Massachusetts) [1].
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Amiri, I.S., Ariannejad, M.M., Ghasemi, M. et al. On comparison of the temperature sensitivity of SU-8-based triple-arm MZI against straight rib optical waveguides patterned on silicon wafer. Indian J Phys 93, 385–391 (2019). https://doi.org/10.1007/s12648-018-1307-0
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DOI: https://doi.org/10.1007/s12648-018-1307-0