Terahertz and optical study of monolayer graphene processed by plasma oxidation

Kyujin Choi; Juhwan Lim; J. R. Rani; Hyong Seo Yoon; Juyeong Oh; Taeyoon Hong; Taewoo Ha; Byung Cheol Park; Kyung Ik Sim; Seong Chan Jun; Jae Hoon Kim

doi:10.1063/1.4795526

Terahertz and optical study of monolayer graphene processed by plasma oxidation

Kyujin Choi, Juhwan Lim, J. R. Rani, Hyong Seo Yoon, Juyeong Oh, Taeyoon Hong, Taewoo Ha, Byung Cheol Park, Kyung Ik Sim, Seong Chan Jun, Jae Hoon Kim

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18 Citations (Scopus)

Abstract

We report on our terahertz and optical study of monolayer graphene grown by chemical vapor deposition and processed by plasma oxidation. The plasma oxidation induces oxygen-related defects, and the resulting disorder increases the sheet resistance of graphene as measured via terahertz spectroscopy. The excitonic absorption peak weakens considerably and blue shifts upon plasma oxidation, resulting in higher transmittance in both the visible and ultraviolet regions. Our oxygen plasma-treated graphene also exhibits a free-carrier doping effect as confirmed by the blue shift of the Raman G band.

Original language	English
Article number	131901
Journal	Applied Physics Letters
Volume	102
Issue number	13
DOIs	https://doi.org/10.1063/1.4795526
Publication status	Published - 2013 Apr 1

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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Choi, K., Lim, J., Rani, J. R., Seo Yoon, H., Oh, J., Hong, T., Ha, T., Cheol Park, B., Ik Sim, K., Chan Jun, S., & Hoon Kim, J. (2013). Terahertz and optical study of monolayer graphene processed by plasma oxidation. Applied Physics Letters, 102(13), [131901]. https://doi.org/10.1063/1.4795526

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AU - Choi, Kyujin

AU - Lim, Juhwan

AU - Rani, J. R.

AU - Seo Yoon, Hyong

AU - Oh, Juyeong

AU - Hong, Taeyoon

AU - Ha, Taewoo

AU - Cheol Park, Byung

AU - Ik Sim, Kyung

AU - Chan Jun, Seong

AU - Hoon Kim, Jae

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