Article (Scientific journals)
Spatially Resolved Photodoping of Oxygen‐Deficient YBa2Cu3O7−δ Resonators
Lejeune, Nicolas; Nulens, Lukas; Li, Huidong et al.
2025In Advanced Materials Technologies
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Abstract :
[en] Oxygen‐depleted YBa2Cu3O7−δ exhibits a substantial drop in the normal‐state resistivity and an increase in the superconducting critical temperature when illuminated with visible light. The photo‐induced states are metastable, slowly decaying at high temperatures and essentially persistent at low temperatures. In this work, this effect is exploited to modify the response of half‐wavelength YBa2Cu3O7−δ resonators and simultaneously the high‐sensitivity of the resonant circuit is used to investigate the persistent photodoping of this material. Under illumination, the bolometric effect and photodoping are clearly distinguished by the different time scales associated with each mechanism. Using a 60 µm‐wide laser spot, the properties of the resonator are locally and reversibly modified, and the position‐dependent sensitivity of the device is demonstrated. This enables the direct imaging of standing waves at both the fundamental resonance and the second harmonic.
Disciplines :
Physics
Author, co-author :
Lejeune, Nicolas  ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Nulens, Lukas ;  Quantum Solid‐State Physics Department of Physics and Astronomy KU Leuven Celestijnenlaan 200D Leuven B‐3001 Belgium
Li, Huidong;  Institut de Ciència de Materials de Barcelona ICMAB‐CSIC Campus UAB Bellaterra 08193 Spain
Günkel, Thomas;  Institut de Ciència de Materials de Barcelona ICMAB‐CSIC Campus UAB Bellaterra 08193 Spain
Fabrega, Lourdes;  Institut de Ciència de Materials de Barcelona ICMAB‐CSIC Campus UAB Bellaterra 08193 Spain
Palau, Anna ;  Institut de Ciència de Materials de Barcelona ICMAB‐CSIC Campus UAB Bellaterra 08193 Spain
Van de Vondel, Joris ;  Quantum Solid‐State Physics Department of Physics and Astronomy KU Leuven Celestijnenlaan 200D Leuven B‐3001 Belgium
Silhanek, Alejandro  ;  Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Language :
English
Title :
Spatially Resolved Photodoping of Oxygen‐Deficient YBa2Cu3O7−δ Resonators
Publication date :
28 October 2025
Journal title :
Advanced Materials Technologies
eISSN :
2365-709X
Publisher :
Wiley
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
HORIZON EUROPE Reforming and enhancing the European Research and Innovation system
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture
F.R.S.-FNRS - Fonds de la Recherche Scientifique
MICINN - Ministerio de Ciencia e Innovacion
COST - European Cooperation in Science and Technology
EU - European Union
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