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How to optically count graphene layers |
Optics Letters, Vol. 37, Issue 18, pp. 3765-3767 (2012)
http://dx.doi.org/10.1364/OL.37.003765
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Abstract
The total thickness of a graphene sample depends upon the number of individually stacked graphene layers. The corresponding surface plasmon resonance (SPR) reflectance alters the SPR angle, depending on the number of graphene layers. Thus, the correlation between the SPR angle shift and the number of graphene layers allows for a nonintrusive, real-time, and reliable counting of graphene layers. A single-layer graphene (SLG) is synthesized by means of chemical vapor deposition, followed by physical transfer to a thin gold film (48 nm) repeatedly, so that multilayer graphene samples with one, three, and five layers can be prepared. Both the measured SPR angles and the entire reflectance curve profiles successfully distinguish the number of graphene layers.
© 2012 Optical Society of America
OCIS Codes
(240.0240) Optics at surfaces : Optics at surfaces
(310.0310) Thin films : Thin films
ToC Category:
Optics at Surfaces
History
Original Manuscript: July 6, 2012
Revised Manuscript: July 30, 2012
Manuscript Accepted: July 30, 2012
Published: September 5, 2012
Citation
Sosan Cheon, Kenneth David Kihm, Jae Sung Park, Joon Sik Lee, Byeong Jun Lee, Hyeoungkeun Kim, and Byung Hee Hong, "How to optically count graphene layers," Opt. Lett. 37, 3765-3767 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-18-3765
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