Photocurrent nanoscopy in the near field: A comparative study of different atomic force microscopy tips in relation to their optical performance

Dai, Dinghe; Siebenkotten, Dario; Šobáň, Zbyněk; Girnghuber, Anna; Krzysteczko, Patryk; Hoehl, Arne; Wunderlich, Jörg; Kästner, Bernd

doi:https://doi.org/10.1002/pssa.202400736

Zugriffsnummer	53743
Dokumenttyp	Zeitschriftenartikel
Peer Review	mit Peer Review
Sprache	Englisch
Titel	Photocurrent nanoscopy in the near field: A comparative study of different atomic force microscopy tips in relation to their optical performance
Autor(in); Institution	Dai, Dinghe; 7.1, Radiometrie mit Synchrotronstrahlung, PTB-Berlin Siebenkotten, Dario; 7.1, Radiometrie mit Synchrotronstrahlung, PTB-Berlin Šobáň, Zbyněk; Institute of Physics Czech Academy of Sciences Cukrovarnická, Prag, CZECH REPUBLIC Girnghuber, Anna; Institute of Experimental and Applied Physics University of Regensburg, Regensburg, GERMANY Krzysteczko, Patryk; 7.6, Kryosensorik, PTB-Berlin Hoehl, Arne; 7.1, Radiometrie mit Synchrotronstrahlung, PTB-Berlin Wunderlich, Jörg; Institute of Experimental and Applied Physics University of Regensburg, Regensburg, GERMANY Kästner, Bernd; 7.1, Radiometrie mit Synchrotronstrahlung, PTB-Berlin
Quelle/Jahr	Special Issue: ALTECH 2024 – Analytical Techniques for Precise Characterization of Nano Materials. Physica Status Solidi A: 222 (2025), 14, 1 - 6
Artikelnummer	2400736
ISSN	1862-6300 (print) ; 1862-6319 (online)
DOI	https://doi.org/10.1002/pssa.202400736
URL	https://onlinelibrary.wiley.com/doi/pdf/10.1002/pssa.202400736
Verlag	Hoboken, USA: Wiley
Zusammenfassung	Photocurrent is a critical observable in a wide range of physical processes across different length scales, serving as a valuable tool for the characterization of semiconductors or two‐dimensional materials. Recently, photocurrent mapping, particularly when combined with magnetothermal transport effects, such as the anomalous Nernst effect (ANE), has been used to image magnetic domains and domain walls. To gain access to photocurrents on the nanoscale, this effect is combined with infrared scattering‐type scanning near‐field optical microscopy, in which strong field enhancement is created at the apex of an atomic force microscopy (AFM) tip, which serves as the confined illumination source creating localized temperature gradients through light absorption in the sample, which can be exploited for ANE detection. Herein, ANE photocurrents generated in a cobalt–iron–boron channel and the optical scattering are compared between various AFM tips, revealing significantly differing behavior for different tips. To gain insight into the origin of these differences, the measurements are further compared to finite element method simulations of tips with varied tip apex radii.

Kostenfreier Zugang	Open Access Hybrid
Rechteinformation	CC BY 4.0 ; Creative Commons Attribution 4.0 License

Themenbereich der Metrologie	Photometrie und Radiometrie
Förderinformationen (1)	Förderername: Deutsche Forschungsgemeinschaft (DFG) Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Titel der Förderung: Investigation of quench switching of antiferromagnets with high spatial and temporal resolution Förderungsnummer: 452301518
Förderinformationen (2)	Förderername: European Union (EU) Förderer ID: 0000 0001 2290 4914 Förderer ID Typ: ISNI Förderprogramm: Marie-Sklodowska-Curie Grant Agreement Titel der Förderung: Cold Opto-Magnetism for Random Access Devices Förderungsnummer: 861300
Förderinformationen (3)	Förderername: Deutsche Forschungsgemeinschaft (DFG) Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Titel der Förderung: Ultrasensing in the nearfield: polariton enhanced molecular fingerprinting Förderungsnummer: 529998081
Förderinformationen (4)	Förderername: Deutsche Forschungsgemeinschaft (DFG) Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Förderprogramm: SFB 1277 (Subprojects A010) Titel der Förderung: Emergente relativistische Effekte in der Kondensierten Materie Förderungsnummer: 314695032
Förderinformationen (5)	Förderername: Czech Ministry of Education, Youth and Sports Förderungsnummer: LM2023051 ; CZ.02.01.01/00/22_008/0004594

Zitierung

Dai, D., Siebenkotten, D., Šobáň, Z., Girnghuber, A., Krzysteczko, P., Hoehl, A., Wunderlich, J., & Kästner, B. (2025). Photocurrent nanoscopy in the near field: A comparative study of different atomic force microscopy tips in relation to their optical performance. Physica Status Solidi A, 222(14), 1–6. https://doi.org/10.1002/pssa.202400736

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