Simultaneous multiband radio-frequency detection using high-orbital-angular-momentum states in a Rydberg-atom receiver

作者：Gianluca Allinson, Matthew J. Jamieson, Andrew R. MacKellar, Lucy A. Downes, Charles S. Adams, Kevin J. Weatherill · 发表于：Physical Review Research · 年份：2024 · DOI：10.1103/physrevresearch.6.023317 · 被引用次数：23 · 研究领域：Cold Atom Physics and Bose-Einstein Condensates、Quantum optics and atomic interactions、Atomic and Subatomic Physics Research

We demonstrate simultaneous detection of radio-frequency (rf) fields ranging from the very high-frequency (VHF) band (128 MHz) to terahertz frequencies (0.61 THz) using high-orbital-angular-momentum ( ℓ ) states in a caesium Rydberg-atom receiver. rf fields are applied concurrently to a series of atomic transitions, where the application of each field allows access to the next-highest ℓ state and the energy separations between states become progressively smaller, allowing access to a very wide range of radio frequencies. We show that the optical response of the system in the presence of the rf fields can be reproduced theoretically using a simple Lindblad-master-equation approach. Furthermore, we demonstrate experimentally that a series of amplitude-modulated tones can be detected simultaneously using a wide range of carrier frequencies. This demonstration opens the way for Rydberg receivers to access low-frequency rf bands at low principal quantum number and allows for communications across multiple bands simultaneously using a single optical receiver. Moreover, the experimental method presented allows for high-resolution spectroscopy of high-orbital-angular-momentum states in alkali-metal atoms. Published by the American Physical Society 2024