Loss-induced switching between electromagnetically induced transparency and critical coupling in a chalcogenide waveguide
| Autor: | Yaodong Sun, Gao Mingqi, Yufei Huang, Di Xia, Zhaohui Li, Bin Zhang, Guiying Hu, Yi Xu, Pingyang Zeng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Chalcogenide business.industry Electromagnetically induced transparency Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Chip Coupling (probability) Coupled mode theory 01 natural sciences Waveguide (optics) Atomic and Molecular Physics and Optics 010309 optics chemistry.chemical_compound Resonator Optics chemistry 0103 physical sciences Photonics 0210 nano-technology business |
| Zdroj: | Optics letters. 46(12) |
| ISSN: | 1539-4794 |
| Popis: | Optical loss is generally perceived to be an adverse effect in integrated optics. Herein, in contrast, we propose a mechanism to harness the loss in a coupled h i g h ‐ Q resonators system to realize on-chip electromagnetically induced transparency (EIT). The increasing loss of one of the coupled resonators results in a difference in Q factor, leading to EIT generation. This optical loss-induced EIT is studied analytically using the coupled-mode theory and demonstrated experimentally in chalcogenide coupled microring resonators. By taking advantage of the chalcogenide phase change materials that feature exceptional optical property contrasts, we further demonstrate the loss-induced mechanism to realize fast and nonvolatile responses between the EIT state and the critical coupling state in a monolithically integrated chip. Our results provide a new perspective to harvest the negative loss effect of coupled resonators for tunable photonic devices, which might shed new light on the design ideology for on-chip slow-light optical components. |
| Databáze: | OpenAIRE |
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