Experimental identification of the out-of-plane phonon mode of a few layered graphene from individual Au nanoparticle-Au film junctions

We can experimentally identify the layer-layer breathing mode and the other out-of-plane transverse acoustic phonon modes of a few layered graphene via employing z-polarized incident field formed at Au nanoparticle-Au film junctions. The observed out-of-plane mode phonon at ∼150 cm−1 and other trans...

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Veröffentlicht in:Applied physics letters 2013-08, Vol.103 (7)
Hauptverfasser: Park, Won-Hwa, Jung, Myunghee, Moon, Jin-San, Hwan Noh, Seok, Hyeong Kim, Tae, Ho Joo, Min, Ho Park, Kyu
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Sprache:eng
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Zusammenfassung:We can experimentally identify the layer-layer breathing mode and the other out-of-plane transverse acoustic phonon modes of a few layered graphene via employing z-polarized incident field formed at Au nanoparticle-Au film junctions. The observed out-of-plane mode phonon at ∼150 cm−1 and other transverse acoustic phonon type defect modes from 300 cm−1 to 700 cm−1 can be readily explored. Not only for the normally used optical method using focused plane wave but also direct applying the z-directional electromagnetic field on graphene will be expected for more detailed out-of-plane phonon characterization of graphene.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4818681