Large-scale integration of artificial atoms with photonic circuits
Tuesday, February 2, 2021 at 11 a.m. EST
Noel Wan, PhD candidate
Electrical Engineering & Computer Science (EECS)
The construction of large, controllable quantum systems is a formidable task in quantum science and technology. In the context of quantum networks, single emitters in diamond have emerged as leading quantum bits that combine long coherence times with efficient optical interfaces. Despite their potential manufacturability, such solid-state qubits have been limited to small-scale quantum network demonstrations due to their low system efficiencies, deteriorated properties in devices, and low yields.
To address these challenges, Wan and fellow researchers report the development of a nanophotonic platform in diamond for the efficient control and routing of photons. In particular, Wan will describe the fabrication and coupling of qubits to single-mode waveguides and photonic crystal resonators. He will then demonstrate the large-scale heterogeneous integration of diamond waveguide-coupled qubits with photonic circuits in another material system.
This hybrid quantum chip architecture enables the combination of coherent qubits in diamond with low-loss active photonics in aluminum nitride or silicon nitride. This modularity also circumvents the low device yields associated with monolithic chips, enabling here a 128-channel, qubit-integrated photonic chip with frequency tunability and high optical coherence. As an outlook, Wan will discuss ongoing efforts that combine the advances toward the construction of a quantum repeater microchip.
Attendees can join and participate in the series via Zoom. Meeting ID#: 860 986 455.