InGaP χ⁽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/cm² at 1.55 μm 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.

SUBMITTER: Akin J 

PROVIDER: S-EPMC11473533 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature