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Probing the luminescence of single Eu2O3 nano-islands on MgO(001) with scanning tunneling microscopy

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons22134

Stavale,  Fernando
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21916

Nilius,  Niklas
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21524

Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Volltexte (frei zugänglich)

Stavale_etal.pdf
(beliebiger Volltext), 302KB

1.4731638.pdf
(Verlagsversion), 885KB

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Zitation

Stavale, F., Nilius, N., & Freund, H.-J. (2012). Probing the luminescence of single Eu2O3 nano-islands on MgO(001) with scanning tunneling microscopy. Applied Physics Letters, 101(1): 013109. doi:10.1063/1.4731638.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0010-2212-D
Zusammenfassung
STM imaging and cathodoluminescence spectroscopy are used to explore the morphology and optical properties of Eu2O3 nano-islands grown on MgO(001) thin films. The global emission properties are governed by intense photon peaks at around 600 nm, arising from forced-dipole transitions in the 4f-state manifold of Eu3+ ions placed in a non-centrosymmetric crystal field. Local optical spectra obtained in the tunneling mode of the STM reveal that the Eu2O3 islands are responsible for the distinct optical response and not isolated Eu3+ ions inside the MgO matrix. Our work demonstrates that thin-film model systems can be used to elucidate fundamental properties of Eu-containing phosphors on the nanometer scale.