Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results

Paul R. Edwards, Kevin P. O'Donnell, Akhilesh K. Singh, Douglas Cameron, Katharina Lorenz, Mitsuo Yamaga, Jacob H. Leach, Menno J. Kappers, Michal Boćkowski

Research output: Contribution to journal › Article

Abstract

Europium is the most-studied and least-well-understood rare earth ion (REI) dopant in GaN. While attempting to increase the efficiency of red GaN light-emitting diodes (LEDs) by implanting Eu+ into p-type GaN templates, the Strathclyde University group, in collaboration with IST Lisbon and Unipress Warsaw, discovered hysteretic photochromic switching (HPS) in the photoluminescence spectrum of doubly doped GaN(Mg):Eu. Our recent work, summarised in this contribution, has used time-, temperature- and light-induced changes in the Eu intra-4f shell emission spectrum to deduce the microscopic nature of the Mg-Eu defects that form in this material. As well as shedding light on the Mg acceptor in GaN, we propose a possible role for these emission centres in quantum information and computing.
LanguageEnglish
Article number1800
Number of pages9
JournalMaterials
Volume11
Issue number10
DOIs
Publication statusPublished - 22 Sep 2018

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europium
emission spectra
light emitting diodes
templates
rare earth elements
Europium
photoluminescence
defects
Rare earths
Light emitting diodes
Photoluminescence
ions
Doping (additives)
Ions
Defects
temperature
Temperature

Keywords

  • gallium nitride
  • rare earth ions
  • europium
  • photoluminescence
  • photochromism
  • qubit

Cite this

Edwards, Paul R. ; O'Donnell, Kevin P. ; Singh, Akhilesh K. ; Cameron, Douglas ; Lorenz, Katharina ; Yamaga, Mitsuo ; Leach, Jacob H. ; Kappers, Menno J. ; Boćkowski, Michal. / Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results. In: Materials. 2018 ; Vol. 11, No. 10.
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title = "Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results",
abstract = "Europium is the most-studied and least-well-understood rare earth ion (REI) dopant in GaN. While attempting to increase the efficiency of red GaN light-emitting diodes (LEDs) by implanting Eu+ into p-type GaN templates, the Strathclyde University group, in collaboration with IST Lisbon and Unipress Warsaw, discovered hysteretic photochromic switching (HPS) in the photoluminescence spectrum of doubly doped GaN(Mg):Eu. Our recent work, summarised in this contribution, has used time-, temperature- and light-induced changes in the Eu intra-4f shell emission spectrum to deduce the microscopic nature of the Mg-Eu defects that form in this material. As well as shedding light on the Mg acceptor in GaN, we propose a possible role for these emission centres in quantum information and computing.",
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Edwards, PR, O'Donnell, KP, Singh, AK, Cameron, D, Lorenz, K, Yamaga, M, Leach, JH, Kappers, MJ & Boćkowski, M 2018, 'Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results' Materials, vol. 11, no. 10, 1800. https://doi.org/10.3390/ma11101800

Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results. / Edwards, Paul R.; O'Donnell, Kevin P.; Singh, Akhilesh K.; Cameron, Douglas; Lorenz, Katharina; Yamaga, Mitsuo; Leach, Jacob H.; Kappers, Menno J.; Boćkowski, Michal.

In: Materials, Vol. 11, No. 10, 1800, 22.09.2018.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results

AU - Edwards, Paul R.

AU - O'Donnell, Kevin P.

AU - Singh, Akhilesh K.

AU - Cameron, Douglas

AU - Lorenz, Katharina

AU - Yamaga, Mitsuo

AU - Leach, Jacob H.

AU - Kappers, Menno J.

AU - Boćkowski, Michal

PY - 2018/9/22

Y1 - 2018/9/22

N2 - Europium is the most-studied and least-well-understood rare earth ion (REI) dopant in GaN. While attempting to increase the efficiency of red GaN light-emitting diodes (LEDs) by implanting Eu+ into p-type GaN templates, the Strathclyde University group, in collaboration with IST Lisbon and Unipress Warsaw, discovered hysteretic photochromic switching (HPS) in the photoluminescence spectrum of doubly doped GaN(Mg):Eu. Our recent work, summarised in this contribution, has used time-, temperature- and light-induced changes in the Eu intra-4f shell emission spectrum to deduce the microscopic nature of the Mg-Eu defects that form in this material. As well as shedding light on the Mg acceptor in GaN, we propose a possible role for these emission centres in quantum information and computing.

AB - Europium is the most-studied and least-well-understood rare earth ion (REI) dopant in GaN. While attempting to increase the efficiency of red GaN light-emitting diodes (LEDs) by implanting Eu+ into p-type GaN templates, the Strathclyde University group, in collaboration with IST Lisbon and Unipress Warsaw, discovered hysteretic photochromic switching (HPS) in the photoluminescence spectrum of doubly doped GaN(Mg):Eu. Our recent work, summarised in this contribution, has used time-, temperature- and light-induced changes in the Eu intra-4f shell emission spectrum to deduce the microscopic nature of the Mg-Eu defects that form in this material. As well as shedding light on the Mg acceptor in GaN, we propose a possible role for these emission centres in quantum information and computing.

KW - gallium nitride

KW - rare earth ions

KW - europium

KW - photoluminescence

KW - photochromism

KW - qubit

UR - https://www.mdpi.com/journal/materials

U2 - 10.3390/ma11101800

DO - 10.3390/ma11101800

M3 - Article

VL - 11

JO - Materials

T2 - Materials

JF - Materials

SN - 1996-1944

IS - 10

M1 - 1800

ER -

Edwards PR, O'Donnell KP, Singh AK, Cameron D, Lorenz K, Yamaga M et al. Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results. Materials. 2018 Sep 22;11(10). 1800. https://doi.org/10.3390/ma11101800

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