Phys.org September 2, 2024
A quantum emitter interacting with photons in a single optical mode constitutes a one-dimensional atom. A coherent and efficiently coupled one-dimensional atom provides a large nonlinearity, enabling photonic quantum gates. Achieving a high coupling efficiency ( factor) and low dephasing is challenging. An international team of researchers (Switzerland, Germany) used a semiconductor quantum dot in an open microcavity as an implementation of a one-dimensional atom. With a weak laser input, they achieved an extinction of 99.2% in transmission and a concomitant bunching in the photon statistics, showcasing the reflection of the single-photon component and the transmission of the multi-photon components of the coherent input. The tunable nature of the microcavity allowed to be adjusted and gave control over the photon statistics and the phase of the transmitted photons. They obtained excellent agreement between experiment and theory. According to the researchers their work paves the way towards the creation of exotic photonic states and two-photon phase gates… read more. Open Access TECHNICAL ARTICLE
A one-dimensional atom. (a) Experimental setup. Weak laser light impinges on a one-sided microcavity… Credit: Phys. Rev. Lett. 133, 083602, 21 August 2024Â