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Electromagnetically Induced Transparency (EIT) Like Transmission Based on 3 × 3 Cascaded Multimode Interference

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Summary

We demonstrate a novel method for achieving electromagnetically induced transparency (EIT)-like transmission using microring resonators. This compact, silicon-based design is compatible with CMOS technology and offers ease of fabrication.

Keywords:
beam propagation method (BPM)electromagnetically induced transparency (EIT)finite difference time difference (FDTD)multimode interference (MMI)optical microring resonatortransfer matrix method (TMM)

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Area of Science:

  • Photonics and optical engineering
  • Quantum optics
  • Integrated optics

Background:

  • Electromagnetically induced transparency (EIT) is a quantum interference effect that dramatically alters the optical properties of a medium.
  • Microring resonators offer compact and efficient platforms for manipulating light-matter interactions in integrated photonic circuits.

Purpose of the Study:

  • To propose and investigate a novel microring resonator-based structure for generating EIT-like transmission.
  • To explore two distinct schemes utilizing coupled Fano resonator units (FRUs) for EIT-like transmission.
  • To assess the feasibility and advantages of the proposed design for integrated photonic applications.

Main Methods:

  • Utilizing cascaded 3 × 3 multimode interference (MMI) structures to create Fano resonance units (FRUs).
  • Employing coupled mode theory and transfer matrix methods for theoretical and numerical analysis.
  • Designing the device using silicon waveguides for CMOS compatibility.

Main Results:

  • Successfully designed and analyzed two coupled FRU schemes for generating EIT-like transmission.
  • Demonstrated the compactness and ease of fabrication of the proposed microring resonator structure.
  • Investigated fabrication tolerances and key design parameters for practical implementation.

Conclusions:

  • The proposed microring resonator design effectively generates EIT-like transmission.
  • The silicon-based platform ensures compatibility with existing CMOS fabrication processes.
  • The study provides a promising approach for developing advanced optical devices with tunable transmission properties.