Auto-heterodyne characterization of narrow-band photon pairs

Abstract

We describe a technique to measure photon pair joint spectra by detecting the time-correlation beat note when non-degenerate photon pairs interfere at a beamsplitter. The technique implements a temporal analog of the Ghosh-Mandel effect with one photon counter and a time-resolved Hong-Ou-Mandel interference with two. It is well suited to characterize pairs of photons, each of which can interact with a single atomic species, as required to study recently predicted photon-photon interaction in sub-wavelength atomic arrays. With this technique, we characterize photon pairs from cavity-enhanced parametric downconversion with a bandwidth $\approx$ 5 MHz and frequency separation of $\sim$ 200 MHz near the D${}_1$ line of atomic Rb.

5 pages, 4 figures

References in corpus (3)

• Spectral Correlation Measurements at the Hong-Ou-Mandel Interference Dip
• Extended Wiener-Khinchin theorem for quantum spectral analysis
• Narrowband photon pairs with independent frequency tuning for quantum light-matter interactions

Cited by in corpus (5)

• Ultimate quantum sensitivity in the estimation of the delay between two interfering photons through frequency-resolving sampling
• Single-photon hologram of a zero-area pulse
• Estimation with ultimate quantum precision of the transverse displacement between two photons via two-photon interference sampling measurements
• Postselection-Free Cavity-Enhanced Narrow-Band Orbital Angular Momentum Entangled Photon Source
• Superresolving collective quantum measurements