Impact of ZIF-8 coatings on cross coupled double ring resonator (CC-SDR) performance: A study on optical loss reduction, resonance extinction ratio and mode confinement
Abstract
Optical microring resonators (MRRs) are used in optical sensing and signal processing, but their performance is often hindered by optical losses due to waveguide surface roughness, scattering, and poor waveguide mode confinement. In this study, we experimentally demonstrate the role of zeolitic imidazolate framework-8 (ZIF-8), a metal-organic framework, as a functional coating to improve the performance of cross-coupled standard double ring resonator (CC-SDR) circuit. The coated CC-SDR exhibited (i) lower overall optical losses by 2 to 3 dB, (ii) increased average resonance extinction ratio (ER) of 6.84 dB, (iii) wavelength resonance shift of 0.4 nm, and (iv) broader linewidth (FWHM) by 0.1 nm compared with uncoated devices excluding exceptions.
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25-28 June 2025, National Institute of Physics, University of the Philippines Diliman
Please visit the SPP2025 activity webpage for more information on this year's Physics Congress.