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

Alqedra, Mohammed K. LU ; Deshmukh, Chetan ; Liu, Shuping ; Serrano, Diana ; Horvath, Sebastian P. LU ; Rafie-Zinedine, Safi LU ; Abdelatief, Abdullah LU ; Rippe, Lars LU ; Kröll, Stefan LU and Casabone, Bernardo , et al. (2023) In Physical Review B 108(7).
Abstract

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... (More)

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.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B
volume
108
issue
7
article number
075107
publisher
American Physical Society
external identifiers
  • scopus:85167868485
ISSN
2469-9950
DOI
10.1103/PhysRevB.108.075107
language
English
LU publication?
yes
id
f966efe3-7572-49cd-b75f-06df72fdc314
date added to LUP
2023-10-24 14:34:43
date last changed
2023-11-21 23:44:47
@article{f966efe3-7572-49cd-b75f-06df72fdc314,
  abstract     = {{<p>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.</p>}},
  author       = {{Alqedra, Mohammed K. and Deshmukh, Chetan and Liu, Shuping and Serrano, Diana and Horvath, Sebastian P. and Rafie-Zinedine, Safi and Abdelatief, Abdullah and Rippe, Lars and Kröll, Stefan and Casabone, Bernardo and Ferrier, Alban and Tallaire, Alexandre and Goldner, Philippe and De Riedmatten, Hugues and Walther, Andreas}},
  issn         = {{2469-9950}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{7}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Optical coherence properties of Kramers' rare-earth ions at the nanoscale for quantum applications}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.108.075107}},
  doi          = {{10.1103/PhysRevB.108.075107}},
  volume       = {{108}},
  year         = {{2023}},
}