Contacts:
Assoc. Prof. Sanshui Xiao
Email: saxi@fotonik.dtu.dk
Tel: 4525 6362
Address: Building: 343, Room 181
Prof. Niels Asger Mortensen
Email: namo@fotonik.dtu.dk
Tel: 5115 7431
Address: Building: 343, Room 072
The mid-infrared spectral region, containing “fingerprints” of the most molecular vibration, is of great technical and scientific interest. The light-matter interactions can be significantly enhanced by plasmonic nanostructures in the visible and near-infrared spectral.
In the mid-infrared and terahertz region, graphene behaviors as a promising plasmonic material that is tunable and adjustable. The supported plasmonic mode is strongly localized near the graphene, and one of the questions is how to probe the graphene plasmon. By taking the advantages of recently installed FTIR Microscope at DTU. In this project, we aim to probe graphene plasmon polaritons in the mid-infrared window, and to investigate the interactions between the graphene nanostructures with different radii.
In this project, your tasks could be focused on the following topics:
- Numerical evaluation of graphene-plasmon enhanced light-matter interaction
- Nanofabrication of graphene nanostructures
- Experimental Investigation of the graphene plasmon polaritons
- Evaluation of the hybridization of the graphene plasmon modes.
References:
[1] X. Zhu, W. Yan, P.U. Jepsen, O. Hansen, N.A. Mortensen, and S. Xiao, Experimental observation of plasmons in a graphene monolayer resting on a two-dimensional subwavelength silicon grating, Appl. Phys. Lett. 102, 131101 (2013).
[2] X. Zhu, L. Shi, M.S. Schmidt, A. Boisen, O. Hansen, J. Zi, S.Xiao, and N. A. Mortensen, Enhanced light-matter interaction in graphene-coved gold nanovoid array, Nano Lett. 13, 4690 (2013).
[3] X. Zhu, W. Wang, W. Yan, M.B. Larsen, P. Bøggild, T.G. Pedersen, S. Xiao, J. Zi, and N.A. Mortensen, Plasmon-phonon coupling in large-area graphene dot and antidot arrays fabricated by nanosphere lithography, Nano. Lett., 14, 2907 (2014).