InGaP ${\chi }^{(2)}$ integrated photonics platform for broadband, ultra-efficient nonlinear conversion and entangled photon generation

Abstract

Nonlinear optics plays an important role in many areas of science and technology. The advance of nonlinear optics is empowered by the discovery and utilization of materials with growing optical nonlinearity. Here we demonstrate an indium gallium phosphide (InGaP) integrated photonics platform for broadband, ultra-efficient second-order nonlinear optics. The InGaP nanophotonic waveguide enables second-harmonic generation with a normalized efficiency of $128,000\%$/W/cm${}^2$ at 1.55 $\mu$m pump wavelength, nearly two orders of magnitude higher than the state of the art in the telecommunication C band. Further, we realize an ultra-bright, broadband time-energy entangled photon source with a pair generation rate of 97 GHz/mW and a bandwidth of 115 nm centered at the telecommunication C band. The InGaP entangled photon source shows high coincidence-to-accidental counts ratio CAR $>10^4$ and two-photon interference visibility $>98\%$. The InGaP second-order nonlinear photonics platform will have wide-ranging implications for non-classical light generation, optical signal processing, and quantum networking.

References in corpus (19)

• Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Photoelectric Quantum Efficiency
• Ultrahigh-efficiency second-harmonic generation in nanophotonic PPLN waveguides
• Entanglement-based wavelength multiplexed quantum communication network
• Entangled photon-pair generation in periodically-poled thin-film lithium niobate waveguides
• Second harmonic generation in nano-structured thin-film lithium niobate waveguides
• Observation of soliton pulse compression in photonic crystal waveguides
• Non-reciprocal nonlinear optic induced transparency and frequency conversion on a chip
• Towards 1% single photon nonlinearity with periodically-poled lithium niobate microring resonators
• Second harmonic generation in phase matched aluminum nitride waveguides
• Intense optical parametric amplification in dispersion engineered nanophotonic lithium niobate waveguides
• Photonic chip-based continuous-travelling-wave parametric amplifier
• Photonic Crystal Optical Parametric Oscillator
• Integrated Quantum Optical Phase Sensor
• Wavelength- and material-dependent absorption in GaAs and AlGaAs microcavities
• InGaP quantum nanophotonic integrated circuits with 1.5% nonlinearity-to-loss ratio
• A source of polarization-entangled photon pairs interfacing quantum memories with telecom photons
• Temporal trapping: a route to strong coupling and deterministic optical quantum computation
• Efficient Type II Second Harmonic Generation in an Indium Gallium Phosphide on insulator wire waveguide aligned with a crystallographic axis
• SPDC in ppLN ridge waveguide: an analysis for efficient twin photon generation at 1550 nm

Cited by in corpus (8)

• Toward ultimate-efficiency frequency conversion in nonlinear optical microresonators
• Generation of tunable quantum entanglement via nonlinearity symmetry breaking in semiconductor metasurfaces
• 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
• Experimental entanglement swapping through single-photon ${\chi }^{(2)}$ nonlinearity
• Perspectives on epitaxial InGaP for quantum and nonlinear optics
• Scalable quantum interference in integrated lithium niobate nanophotonics
• Fidelity and efficiency analysis for heralded entanglement swapping in lossy channels: linear and nonlinear optical approaches