Optical coherence properties of Kramers' rare-earth ions at the nanoscale for quantum applications

Alqedra，Mohammed K.1; Deshmukh，Chetan2; Liu，Shuping3,4; Serrano，Diana3; Horvath，Sebastian P.1; Rafie-Zinedine，Safi1; Abdelatief，Abdullah1; Rippe，Lars1; Kröll，Stefan1; Casabone，Bernardo2; Ferrier，Alban3,5; Tallaire，Alexandre3; Goldner，Philippe3; De Riedmatten，Hugues2,6; Walther，Andreas1

2023-08-15

10.1103/PhysRevB.108.075107

Physical Review B   Impact Factor & Quartile

2469-9950

2469-9969

Rare Earth (RE) ion doped nanomaterials are promising candidates for a range of quantum technology applications. Among RE ions, the so-called Kramers' ions possess spin transitions in the GHz range at low magnetic fields, which allows for high-bandwidth multimode quantum storage, fast qubit operations as well as interfacing with superconducting circuits. They also present relevant optical transitions in the infrared. In particular, Er3+ has an optical transition in the telecom band, while Nd3+ presents a high-emission-rate transition close to 890 nm. In this paper, we measure spectroscopic properties that are of relevance to using these materials in quantum technology applications. We find the inhomogeneous linewidth to be 10.7 GHz for Er3+ and 8.2 GHz for Nd3+, and the excited state lifetime T1 to be 13.68 ms for Er3+ and 540μs for Nd3+. We study the dependence of homogeneous linewidth on temperature for both samples, with the narrowest linewidth being 379 kHz (T2=839 ns) for Er3+ measured at 3 K, and 62 kHz (T2=5.14μs) for Nd3+ measured at 1.6 K. Further, we investigate time-dependent homogeneous linewidth broadening due to spectral diffusion and the dependence of the homogeneous linewidth on magnetic field to get additional clarity of mechanisms that can influence the coherence time. In light of our results, we discuss two applications: single qubit-state readout and a Fourier-limited single photon source.

SCI

English

NI Journal Papers

Others

European Union["820391","712721"] ; Swedish Research Council[2021-03755] ; Wallenberg Center for Quantum Technology (WACQT) - Knut and Alice Wallenberg Foundation[KAW 2017.0449] ; government of Spain[PID 2019-106850RB-I00] ; MCIN/AEI[CEX2019000910-S] ; European Union NextGenerationEU[PRTR-C17.I1] ; Swedish Research Council[2021-03755]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001080488200002

AMER PHYSICAL SOC

PHYSICS

2-s2.0-85167868485

Scopus

1.Department of Physics,Lund University,Lund,P.O. Box 118,SE-22100,Sweden
2.ICFO-Institut de Ciencies Fotoniques,The Barcelona Institute of Science and Technology,Barcelona,Castelldefels,08860,Spain
3.Chimie ParisTech,PSL University,CNRS,Institut de Recherche de Chimie Paris,Paris,75005,France
4.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.Faculté des Sciences et Ingénierie,Sorbonne Université,UFR 933,Paris,75005,France
6.ICREA-Institució Catalana de Recerca i Estudis Avaçats,Barcelona,08015,Spain

Alqedra，Mohammed K.,Deshmukh，Chetan,Liu，Shuping,et al. Optical coherence properties of Kramers' rare-earth ions at the nanoscale for quantum applications[J]. Physical Review B,2023,108(7).

Alqedra，Mohammed K..,Deshmukh，Chetan.,Liu，Shuping.,Serrano，Diana.,Horvath，Sebastian P..,...&Walther，Andreas.(2023).Optical coherence properties of Kramers' rare-earth ions at the nanoscale for quantum applications.Physical Review B,108(7).

Alqedra，Mohammed K.,et al."Optical coherence properties of Kramers' rare-earth ions at the nanoscale for quantum applications".Physical Review B 108.7(2023).