Sub-THz characterisation of monolayer graphene

Ehsan Dadrasnia (1) , Sujitha Puthukodan (1) , Vinod V. K. Thalakkatukalathil (1) , Horacio Lamela (1) , Guillaume Ducournau (2) , Jean-Francois Lampin (2) , Frédéric Garet (3) , Jean-Louis Coutaz (3)

1 GOTL - Optoelectronics and Laser Technology Group
2 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
3 IMEP-LAHC - Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation

We explore the optical and electrical characteristics of monolayer graphene by using pulsed optoelectronic terahertz time-domain spectroscopy in the frequency range of 325-500 GHz based on fast direct measurements of phase and amplitude. We also show that these parameters can, however, be measured with higher resolution using a free space continuous wave measurement technique associated with a vector network analyzer that offers a good dynamic range. All the scattering parameters (both magnitude and phase) are measured simultaneously. The Nicholson-Ross-Weir method is implemented to extract the monolayer graphene parameters at the aforementioned frequency range.

Domaines: Electromagnétisme

Ehsan Dadrasnia, Sujitha Puthukodan, Vinod V. K. Thalakkatukalathil, Horacio Lamela, Guillaume Ducournau, et al.. Sub-THz characterisation of monolayer graphene. Journal of Spectroscopy, 2014, 2014, 601059, 6 p. ⟨10.1155/2014/601059⟩. ⟨hal-01044860⟩