Towards Quantum Applications of Integrated Photonic Devices

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Chip-based photonic devices are doing for optics what integrated circuits have done for electronics. By directly combining many individual components in a compact, scalable and robust way, photonic chips open the possibility for creating optical and electro-optical devices that could not be practical with discrete components. The applications for this technology are broad and far-reaching, ranging from commercial telecommunications uses to fundamental experiments which probe the physical nature of light. ', 'In this work, we focus on novel devices targeted for quantum optics applications that harness the advantages of these integrated systems towards problems in information processing and fundamental research. In order to achieve these goals, we target devices that manipulate and generate quantum states of light. This work will present simulation and experimental results form a host of integrated materials and layouts.', 'First we will discuss simulation efforts for a receiver design that can selectively manipulate high-dimensional photonic signals in overlapping temporal modes. This lithium-niobate waveguide based experiment relies on precise pump waveforms to extract the target signal mode with high selectivity. The simulation and optimization efforts presented here support the experimental work carried out by other members of this group.', 'To complement our receiver scheme, we present a CMOS-compatible platform for telecom C-band photon pairs. This chip is based on a novel integrated waveguide which uses hydrogenated amorphous silicon as the guiding material. This short, 8-mm chip produces photon-pairs in far-detuned multiple wavelength channels simultaneously with a coincidence-to-accidental ratio as high as 400. With insignificant Raman scattering over a spectrum of at least 5 THz, this material holds promise for large-scale quantum applications, especially those based on multiplexed photon sources.', 'Next, we present work in silicon nitride ring and disk resonators. With a moderate chi 3, but no two-photon absorption for light near 1550 nm, this material has been shown to be highly versatile for chip-based based nonlinear optics in the near infrared. In this work, we investigate all-optical switching behavior which can route and filter quantum signals without introducing degrading in-band spontaneous noise. Finally, we present simulation and preliminary experimental work towards phase-sensitive stimulated and spontaneous cascaded four-wave mixing which can be used to manipulate frequency comb generation of classical or quantum signals. ', 'In full, we show progress towards integrated devices which can be the basis of sophisticated large-scale chip-based quantum photonic circuits communicating via optical fiber interconnects.

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  • 10/28/2019
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