High-Effciency Cross-Phase Modulation in a Gas-Filled Waveguide

Abstract

Strong cross-Kerr non-linearities have been long sought after for quantum information applications. Recent work has shown that they are intrinsically unreliable in travelling wave configurations: cavity configurations avoid this, but require knowledge of both the non-linearity and the loss. Here we present a detailed systematic study of cross-phase modulation, and absorption, in a rubidium vapour confined within a hollow-core photonic crystal fibre. Using a two-photon transition, we observe phase modulations of up to $\pi$rad with a signal power of 25$\mu$W, corresponding to a non-linear Kerr coefficient, $n_2$, of $0.8\times 10^{-6}$ cm${}^2$/W, or $1.3\times 10^{-6}$ rad per photon.

References in corpus (6)

• Silica-on-Silicon Waveguide Quantum Circuits
• Experimental demonstration of quantum memory for light
• Resource-efficient linear optical quantum computation
• Observation of optical-fiber Kerr nonlinearity at the single-photon level
• Optimal light storage in atomic vapor
• Breakdown of the cross-Kerr scheme for Photon Counting

Cited by in corpus (16)

• Microwave photonics with superconducting quantum circuits
• Strongly interacting photons in one-dimensional continuum
• ElecSus: A program to calculate the electric susceptibility of an atomic ensemble
• Rydberg atoms in hollow-core photonic crystal fibres
• Enhanced light-vapor interactions and all optical switching in a chip scale micro-ring resonator coupled with atomic vapor
• An atomic Faraday beam splitter for light generated from pump degenerate four-wave mixing in a hollow-core photonic crystal fiber
• Laser-cooled caesium atoms confined with magic-wavelength dipole inside a hollow-core photonic-bandgap fiber
• Arbitrary synthetic dimensions via multi-boson dynamics on a one-dimensional lattice
• Continuous generation of Rubidium vapor in hollow-core photonic band-gap fibers
• Fiber-integrated spectroscopy device for hot alkali vapor
• Quantum state engineering via coherent-state superpositions in traveling optical fields
• Optimal quantum phase estimation with generalized multi-component Schrodinger cat states
• Single-photon characteristics of superposed weak coherent states
• Broadband photon-photon interactions mediated by cold atoms in a photonic crystal fiber
• Photo-induced modifications of the substrate-adsorbate interaction in K-loaded porous glass
• Loss tolerant cross-Kerr enhancement via modulated squeezing