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http://hdl.handle.net/2289/5271
Title: | Effects of disorder on the optical properties of CVD grown polycrystalline graphene |
Authors: | Podila, Ramakrishna Anand, Benoy Spear, John T. Puneet, P. Philip, Reji Siva Sankara Sai, S. Rao, Apparao M. |
Issue Date: | Mar-2012 |
Publisher: | RSC Publishing |
Citation: | Nanoscal, 2012, Vol. 4, p1770 |
Abstract: | We explore the effects of crystallite size (La) on the linear and non-linear optical properties of chemical vapor deposition grown polycrystalline graphene. The π-plasmon resonance present at [similar]4.75 eV ([similar]260 nm) in the optical absorption spectrum of graphene follows the empirical relationship λπ = 250.5 nm + 89.5 nm2/La, where λπ represents the π-plasmon wavelength. Furthermore, our Z-scan studies reveal that the crystallite size significantly changes the saturation intensity in CVD grown graphene. Notably, in comparison to epitaxial graphene layers grown on SiC wafers which exhibit a photogenerated carrier lifetime of few picoseconds, we find that the photogenerated carriers in our CVD grown graphene can exhibit lifetimes as long as nanoseconds. |
Description: | Restricted Access |
URI: | http://hdl.handle.net/2289/5271 |
ISSN: | 2040-3364 2040-3372 (Online) |
Alternative Location: | http://dx.doi.org/10.1039/C2NR11206J http://adsabs.harvard.edu/abs/2012Nanos...4.1770P |
Copyright: | 2012 RSC Publishing |
Appears in Collections: | Research Papers (LAMP) |
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File | Description | Size | Format | |
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2012_Nanoscale_V4_p1770.pdf Restricted Access | Restricted Access | 393.85 kB | Adobe PDF | View/Open Request a copy |
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