Tunable optical analog to electromagnetically induced transparency in graphene-ring resonators system

Area of Science:

• Photonics and Optical Engineering
• Quantum Information Science
• Materials Science

Background:

• Electromagnetically induced transparency (EIT) analogues offer potential in optical delay and quantum information technology.
• Current EIT devices suffer from poor tunability, limiting their practical applications.

Purpose of the Study:

• To demonstrate a tunable optical transparency system using graphene-silicon microrings.
• To overcome the tunability limitations of existing EIT devices through electro-optical control.

Main Methods:

• Fabrication of cascaded coupled ring resonators integrated with a graphene/graphene capacitor.
• Modulation of the round-trip ring loss by tuning the Fermi level of graphene sheets.
• Electro-optical control of the transparency window.

Main Results:

• Successful demonstration of a tunable optical transparency system.
• Dynamic tuning of the transparency window achieved by modulating graphene's Fermi level.
• Significant improvement in the tunability of optical transparency devices.

Conclusions:

• The graphene-silicon microring system provides a novel method for light manipulation.
• This technology is suitable for highly integrated optical circuits and quantum information storage.
• The electro-optical tunability offers enhanced control for advanced photonic applications.