In this one-hour seminar, Alexander Senichev, Purdue University, will be presenting a talk titled: “Quantum Photonics with Intrinsic Single-Photon Emitters in Silicon Nitride.”
Abstract – Photonic-based quantum platforms are highly promising for both fundamental studies and practical applications in quantum information science due to photon’s ultimate speed, weak interactions with matter and robustness to decoherence. Discovering and exploring on-chip photonic elements that can efficiently generate, manipulate, and detect quantum states of light, and integrate these components in a low-loss and scalable platform, is an urgent need. Silicon nitride (SiN) is one of the most promising and established material platforms for integrated quantum photonics. However, until recently, SiN lacked an intrinsic atomic-like source of single photons, which required the use of probabilistic nonlinear sources or hybrid heterogeneous integration with other materials hosting quantum emitters. In our research, we discovered intrinsic color centers in low-autofluorescence SiN and developed techniques for their creation [1]. These emitters exhibit high single-photon purity and brightness at room temperature. Furthermore, they can be monolithically integrated with the technologically favorable silicon nitride photonics platforms [2], which holds great potential for various applications in the quantum domain. In my talk, I will delve into our research effort to engineer these novel quantum emitters in SiN, integrate them with on-chip photonic structures, and explore their photophysical properties [3] and potential avenues for their improvement and applications.
References
[1] Senichev et al., Sci. Adv. 7, eabj0627 (2021)
[2] Senichev et al., ACS Photonics, 9(10), 3357–3365 (2022)
[3] Martin et al., ArXiv, 2301.10809 (2023)
Bio – Alexander Senichev is a postdoctoral researcher in Prof. Vladimir M. Shalaev’s group at Purdue University. His primary focus is on experimental nanophotonics and materials for quantum photonic applications. He completed his doctoral research at the Max Planck Institute of Microstructure Physics (Germany) and obtained his Ph.D. in Physics with distinction in 2016, followed by a postdoctoral position in the Quantum Semiconductor Systems Group at Purdue University. He joined the Prof. Shalaev’s Group in 2020 to work on the goal of developing materials for quantum photonic devices, which involves exploring optically active defects in solids with the aim of identifying a new generation of chip-integrated solid-state quantum emitters. His contributions to the field include the discovery of single-photon emitters in a technologically important silicon nitride photonic platform.
This is an in-person seminar. If you opt to join via Zoom use:
Meeting ID 820 0152 2880
Passcode 560793
For further information, please contact:
Leah Abraha
labraha@gc.cuny.edu