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Updated: Jun 29, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Published on: November 30, 2012

Fully Programmable Slow Light Based on a Spinor Representation of Generalized Coupled-Resonator-Induced Transparency.

Seungkyun Park1,2,3, Beomjoon Chae2, Hyungchul Park2

  • 1Photonic Systems Laboratory, Department of Electrical and Computer Engineering, Seoul National University, Seoul, South Korea.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 28, 2026
PubMed
Summary

Researchers developed programmable coupled-resonator-induced transparency (CRIT) using dual-channel gauge fields. This breakthrough enables dynamic spectral engineering for advanced photonic integrated circuits and optical interconnects.

Keywords:
coupled‐resonator‐induced transparencyphotonic integrated circuitphotonic latticesprogrammable photonicsreconfigurable photonicssilicon photonicsslow lightspinor

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Area of Science:

  • Quantum optics and photonics
  • Topological photonics
  • Integrated photonics

Background:

  • Electromagnetically induced transparency (EIT) relies on quantum interference in atomic systems.
  • Coupled-resonator-induced transparency (CRIT) is a photonic analogue of EIT, crucial for slow light applications.
  • Topological photonics inspires generalizing EIT and CRIT using gauge fields.

Purpose of the Study:

  • To propose and demonstrate a generalized CRIT framework.
  • To enable fully programmable CRIT with dynamical spectral engineering.
  • To unify EIT and CRIT descriptions using spinor representation and unitary operations.

Main Methods:

  • Introduced a spinor representation for bright- and dark-mode resonances.
  • Utilized dual-channel gauge fields for a coupled-resonator building block.
  • Demonstrated a programmable slow-light band in a 1D CRIT lattice.

Main Results:

  • Achieved fully programmable CRIT with dynamical spectral engineering.
  • Developed a unified description of design parameters through universal unitary operations.
  • Implemented a programmable CRIT unit cell on a silicon nitride platform.

Conclusions:

  • The proposed generalized CRIT addresses needs in optical interconnects.
  • Demonstrated tunable delay lines, reconfigurable synchronization, and linear frequency conversion.
  • Paves the way for advanced functionalities in photonic integrated circuits.