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

Research output: Contribution to journal › Article › peer-review

23 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

Bibliographical note

Funding Information:
This work was partially supported by the Quantum Metamaterial Research Center Program (Contract No. 2012-0000546), the Pioneer Research Center Program (2010-0019313), and the Priority Research Centers Program (2009-0093823) through the National Research Foundation (NRF) funded by the Ministry of Education, Science and Technology (MEST) of Korea.

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4795526

Cite this

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title = "Terahertz and optical study of monolayer graphene processed by plasma oxidation",

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.",

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

note = "Funding Information: This work was partially supported by the Quantum Metamaterial Research Center Program (Contract No. 2012-0000546), the Pioneer Research Center Program (2010-0019313), and the Priority Research Centers Program (2009-0093823) through the National Research Foundation (NRF) funded by the Ministry of Education, Science and Technology (MEST) of Korea.",

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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

N1 - Funding Information: This work was partially supported by the Quantum Metamaterial Research Center Program (Contract No. 2012-0000546), the Pioneer Research Center Program (2010-0019313), and the Priority Research Centers Program (2009-0093823) through the National Research Foundation (NRF) funded by the Ministry of Education, Science and Technology (MEST) of Korea.

PY - 2013/4/1

Y1 - 2013/4/1

N2 - 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.

AB - 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.

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Terahertz and optical study of monolayer graphene processed by plasma oxidation

Abstract

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