Temporal imaging for ultra-narrowband few-photon states of light
Mateusz Mazelanik, Adam Leszczyński, Michał Lipka, Michał Parniak, Wojciech Wasilewski
Abstract
Plenty of quantum information protocols are enabled by manipulation and detection of photonic spectro-temporal degrees of freedom via light–matter interfaces. While present implementations are well suited for high-bandwidth photon sources such as quantum dots, they lack the high resolution required for intrinsically narrowband light–atom interactions. Here, we demonstrate far-field temporal imaging based on ac-Stark spatial spin-wave phase manipulation in a multimode gradient echo memory. We achieve a spectral resolution of 20 kHz with MHz-level bandwidth and an ultralow noise equivalent to 0.023 photons, enabling operation in the single-quantum regime.
Topics & Concepts
NarrowbandPhotonPhysicsOpticsOptoelectronicsComputer scienceQuantum optics and atomic interactionsLaser-Matter Interactions and ApplicationsAdvanced Fiber Laser Technologies