Long-range cooperative resonances in rare-earth ion arrays inside photonic resonators

Abstract

Engineering arrays of active optical centers to control the interaction Hamiltonian between light and matter has been the subject of intense research recently. Collective interaction of atomic arrays with optical photons can give rise to directionally enhanced absorption or emission, which enables engineering of broadband and strong atom-photon interfaces. Here, we report on the observation of long-range cooperative resonances in an array of rare-earth ions controllably implanted into a solid-state lithium niobate micro-ring resonator. We show that cooperative effects can be observed in an ordered ion array extended far beyond the light’s wavelength. We observe enhanced emission from both cavity-induced Purcell enhancement and array-induced collective resonances at cryogenic temperatures. Engineering collective resonances as a paradigm for enhanced light-matter interactions can enable suppression of free-space spontaneous emission. The multi-functionality of lithium niobate hosting rare-earth ions can open possibilities of quantum photonic device engineering for scalable and multiplexed quantum networks.

Highly luminescent ultra-thin films with rare earth for plasmonic applications

“…An analogous phenomenon was reported in modeling of emitters distributed on top of a metal nanoparticle supporting localized surface plasmons [31]: At a close distance to the nanoparticle surface, the radiation of an individual emitter resonantly coupled to the dipole plasmon is strongly quenched due to excitation of off-resonance plasmons with high angular momenta l. However, for large number of emitters oscillating coherently, as they form a collective state via near-field coupling with the dipole plasmon, the quenching due to excitation of high-k plasmons is suppressed due to much weaker field variation as compared to that of individual emitters [31]. Long range cooperative behavior of emitters has been recently reported [32] in micro-ring resonators as well, leading to modification in the emission pattern and kinetics.…”

Integrated Photonics Based on Rare‐Earth Ion‐Doped Thin‐Film Lithium Niobate

“…And this has been realized very recently in LNOI platform, demonstrating the shortened lifetime of Tm 3+ ions due to both the Purcell enhancement offered by fabricated micro‐cavities and the long‐range cooperative resonances in arrays of FIB‐implanted ions. [ 156 ] The proposed ordered/disordered ion array fabrication and array‐induced enhanced light scattering effect can be very promising for future research on many‐body and cooperative phenomena.…”

Characteristics of 1D ordered arrays of optical centers in solid-state photonics

“…Enhanced light collection (reduced loss) was observed at a wavelength commensurate with the lattice [14]. (c) An array of Tm ions implanted into a lithium niobate microring resonator can exhibit long-range coupling with superradiance signatures [13].…”

“…The rare-earth ions in bulk crystals have been used to demonstrate broadband quantum light storage and these systems have the potential to reach coherence time on the order of hours [8]. Rare earth ions randomly (a) An standing-wave pump was used to create (via the holeburning process) an effective array in a randomly Er-doped Y2SiO5 (YSO) crystal [13]. The effective array could then create an atomic Bragg grating reflecting the probe light after the holeburning process was completed.…”

“…Figure 1. (a) An standing-wave pump was used to create (via the holeburning process) an effective array in a randomly Er-doped Y2SiO5 (YSO) crystal[13]. The effective array could then create an atomic Bragg grating reflecting the probe light after the holeburning process was completed.…”