%0 Electronic Article
%A Ulanov, Alexander
%A Ruhnke, Bastian
%A Wildi, Thibault
%A Herr, Tobias
%T Quadrature squeezing in a nanophotonic microresonator
%N arXiv:2502.17337
%M PUBDB-2025-01534
%M arXiv:2502.17337
%D 2025
%Z 9 pages, 3 figures
%X Squeezed states of light are essential for emerging quantum technology in metrology and information processing. Chip-integrated photonics offers a route to scalable and efficient squeezed light generation, however, parasitic nonlinear processes and optical losses remain significant challenges. Here, we demonstrate single-mode quadrature squeezing in a photonic crystal microresonator via degenerate dual-pump spontaneous four-wave mixing. Implemented in a scalable, low-loss silicon-nitride photonic-chip platform, the microresonator features a tailored nano-corrugation that modifies its resonances to suppress parasitic nonlinear processes. In this way, we achieve an estimated 7.8 dB of on-chip squeezing in the bus waveguide, with potential for further improvement. These results open a promising pathway toward integrated squeezed light sources for quantum-enhanced interferometry, Gaussian boson sampling, coherent Ising machines, and universal quantum computing.
%F PUB:(DE-HGF)25
%9 Preprint
%R 10.3204/PUBDB-2025-01534
%U https://bib-pubdb1.desy.de/record/627009