We have measured optical transmission and reflection spectra of large scale graphene grown by chemical vapor deposition technique over the extensive frequency range from far-IR to uv (4 meV–6.2 eV). Large scale graphene exhibits an excitonic absorption peak in the uv-region and the constant interband absorption with in the IR-visible region, respectively. In the far-IR range, Drude peak is observed, and its strength indicates the induced carrier density . These results are highly consistent with the theoretical prediction/experimental results of the single layer graphene. It proves that, contrary to the doubts about its quality due to the chemical growth process, the sample has single layer optical response over the entire photon energy; therefore, it can be applied to large scale devices such as terahertz-IR detector, solar cell material, and visible uv-transparent conductor.
Skip Nav Destination
Research Article| February 14 2011
Optical response of large scale single layer graphene
Joo Youn Kim;
Keun Soo Kim;
Byung Hee Hong;
Chul Lee, Joo Youn Kim, Sukang Bae, Keun Soo Kim, Byung Hee Hong, E. J. Choi; Optical response of large scale single layer graphene. Appl. Phys. Lett. 14 February 2011; 98 (7): 071905. https://doi.org/10.1063/1.3555425
Download citation file:
Don't already have an account? Register
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Could not validate captcha. Please try again.