Monolithically Integrated C-Band Quantum Emitters on Foundry Silicon Photonics.

Area of Science:

• Quantum information science
• Solid-state quantum systems
• Nanophotonics

Background:

• Solid-state spin-based quantum systems offer advantages for quantum networking, including optical interfaces and long-lived quantum memories.
• Fabricating subwavelength photonic crystal cavities for enhanced emission is typically limited to small-batch electron beam lithography.
• Scalable manufacturing is crucial for advancing quantum networking technologies.

Purpose of the Study:

• To demonstrate high-quality factor, small mode volume nanobeam cavities using a scalable silicon photonic foundry platform.
• To interface these cavities with single erbium ions for enhanced photon emission.
• To establish a manufacturable route towards deterministic single photon sources in the telecom C-band.

Main Methods:

• Fabrication of nanobeam cavities on a silicon photonic foundry platform.
• Integration of single erbium ions via backend deposition of TiO2 thin films.
• Characterization of cavity performance and single ion lifetime measurements.

Main Results:

• Demonstration of high quality factor and small mode volume nanobeam cavities.
• Achieved Purcell enhancement of single erbium ion emission up to approximately 500.
• Successful interfacing of foundry-fabricated cavities with single erbium ions.

Conclusions:

• Scalable fabrication of nanobeam cavities is achievable using silicon photonic foundry platforms.
• The demonstrated system provides a viable pathway for creating manufacturable, deterministic single photon sources.
• This work advances the development of quantum networking applications utilizing solid-state quantum systems.