3,258 research outputs found
Silicon-Nitride Platform for Narrowband Entangled Photon Generation
CMOS-compatible photonic chips are highly desirable for real-world quantum
optics devices due to their scalability, robustness, and integration with
electronics. Despite impressive advances using Silicon nanostructures,
challenges remain in reducing their linear and nonlinear losses and in creating
narrowband photons necessary for interfacing with quantum memories. Here we
demonstrate the potential of the silicon nitride (Si3N4) platform by realizing
an ultracompact, bright, entangled photon-pair source with selectable photon
bandwidths down to 30 MHz, which is unprecedented for an integrated source.
Leveraging Si3N4's moderate thermal expansion, simple temperature control of
the chip enables precise wavelength stabilization and tunability without active
control. Single-mode photon pairs at 1550 nm are generated at rates exceeding
107 s-1 with mW's of pump power and are used to produce time-bin entanglement.
Moreover, Si3N4 allows for operation from the visible to the mid-IR, which make
it highly promising for a wide range of integrated quantum photonics
applications.Comment: Please don't hesitate to email comments and suggestion
Dual-pumped degenerate Kerr oscillator in a silicon nitride microresonator
We demonstrate a degenerate parametric oscillator in a silicon-nitride
microresonator. We use two frequency-detuned pump waves to perform parametric
four-wave mixing and operate in the normal group-velocity dispersion regime to
produce signal and idler fields that are frequency degenerate. Our theoretical
modeling shows that this regime enables generation of bimodal phase states,
analogous to the \c{hi}(2)-based degenerate OPO. Our system offers potential
for realization of CMOS-chip-based coherent optical computing and an
all-optical quantum random number generator
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