Speaker: Dominic Catanzaro, Stanford University

 

Title: Electrical Control of Silicon Carbide Cavity QED Systems

 

Abstract: Color centers in 4H silicon carbide have recently become an excellent platform for studying quantum information science, and the silicon vacancy is particularly attractive because of its well-studied spin-3/2 level structure, long spin coherence, convenient optical transition wavelength, and nanophotonic compatibility [1,2]. To date, the core challenge in building complex spin-photon entangled states with the silicon vacancy is the spectral diffusion and inhomogeneous distribution of individual defect optical frequencies. Controlling spectral inhomogeneous distributions have been demonstrated via Stark tuning of individual silicon vacancies in bulk 4H silicon carbide [3]. In this talk I will speak about our efforts to integrate electrical control into 4H silicon carbide photonics. I will discuss both our progress with controlling and stabilizing individual defects as well as our recent measurements of the electro-optic effect within 4H silicon carbide.

[1] Babin, Charles, et al. "Fabrication and nanophotonic waveguide integration of silicon carbide colour centres with preserved spin-optical coherence." Nature materials 21.1 (2022): 67-73.

[2] Park, Jeongeun, et al. "Mechanism for selective initialization of silicon-vacancy spin qubits with S= 3/2 in silicon carbide." Physical Review Applied 21.5 (2024): 054005.

[3] Lukin, Daniil M., et al. "Spectrally reconfigurable quantum emitters enabled by optimized fast modulation." npj Quantum Information 6.1 (2020): 80.

 

Bio: Dominic Catanzaro is a PhD candidate working under Professor Jelena Vučković in the Department of Electrical Engineering at Stanford University. His research focuses on the development of nanophotonic devices coupled to solid state qubits in 4H silicon carbide for quantum simulation, computing, and networking. He also studies free electron interactions with solid-state qubits with applications to quantum sensing. He received a B.S. in Applied Physics from Caltech in 2021.