InGaP quantum nanophotonic integrated circuits with 1.5% nonlinearity-to-loss ratio

Abstract

Optical nonlinearity plays a pivotal role in quantum information processing using photons, from heralded single-photon sources, coherent wavelength conversion to long-sought quantum repeaters. Despite the availability of strong dipole coupling to quantum emitters, achieving strong bulk optical nonlinearity is highly desirable. Here, we realize quantum nanophotonic integrated circuits in thin-film InGaP with a record-high ratio of $1.5\%$ between the single-photon nonlinear coupling rate ($g/2\pi =11.2$ MHz) and cavity-photon loss rate . We demonstrate second-harmonic generation with an efficiency of $71200\pm 10300\%$/W in the InGaP photonic circuit and photon-pair generation via degenerate spontaneous parametric down-conversion with an ultrahigh rate exceeding 27.5 MHz/$\mu$W -- an order of magnitude improvement of the state-of-the-art -- and a large coincidence-to-accidental ratio up to $1.4\times 10^4$. Our work shows InGaP as a potentially transcending platform for quantum nonlinear optics and quantum information applications.

References in corpus (8)

• Towards 1% single photon nonlinearity with periodically-poled lithium niobate microring resonators
• Ultra-bright Quantum Photon Sources on Chip
• High-performance quantum entanglement generation via cascaded second-order nonlinear processes
• Input-Output Formalism for Few-Photon Transport: A Systematic Treatment Beyond Two Photons
• Photonic Crystal Optical Parametric Oscillator
• Wavelength- and material-dependent absorption in GaAs and AlGaAs microcavities
• Efficient Type II Second Harmonic Generation in an Indium Gallium Phosphide on insulator wire waveguide aligned with a crystallographic axis
• Few-photon transport via a multimode nonlinear cavity: theory and applications

Cited by in corpus (18)

• Enhanced infrared vision by nonlinear up-conversion in nonlocal metasurfaces
• Quantum nondemolition measurements with optical parametric amplifiers for ultrafast universal quantum information processing
• Temporal trapping: a route to strong coupling and deterministic optical quantum computation
• InGaP ${\chi }^{(2)}$ integrated photonics platform for broadband, ultra-efficient nonlinear conversion and entangled photon generation
• Toward ultimate-efficiency frequency conversion in nonlinear optical microresonators
• Generation of tunable quantum entanglement via nonlinearity symmetry breaking in semiconductor metasurfaces
• Mesoscopic ultrafast nonlinear optics -- The emergence of multimode quantum non-Gaussian physics
• Strong nanophotonic quantum squeezing exceeding 3.5 dB in a foundry-compatible Kerr microresonator
• Synthetic five-wave mixing in an integrated microcavity for visible-telecom entanglement generation
• Faithful quantum teleportation via a nanophotonic nonlinear Bell state analyzer
• Photon pair generation via down-conversion in III-V semiconductor microrings: modal dispersion and quasi-phase matching
• Nonlinear protocol for high-dimensional quantum teleportation
• Few-photon transport via a multimode nonlinear cavity: theory and applications
• Quantum effects beyond mean-field treatment in quantum optics
• Perspectives on epitaxial InGaP for quantum and nonlinear optics
• Observation of photon-phonon correlations via dissipative filtering
• Practical Limits on Integrated Squeezers
• Fidelity and efficiency analysis for heralded entanglement swapping in lossy channels: linear and nonlinear optical approaches