Welcome to the homepage of the ISU Nano-Optics Group !

Our group is in the Department of Physics & Astronomy at Iowa State University. We are also associated with the U.S. Department of Energy's Ames Laboratory.

We are dedicated to exploring nanoscale light-matter interactions in varieties of novel materials including graphene, two-dimensional layered materials beyond graphene, complex materials and so on. In order to beat the diffraction limit and explore optical physics of materials at the nanometer length scale, we take advantage of the advanced near-field and tip-enhanced techniques.

The main capabilities of our group will include ultra-small & ultra-fast optical imaging and spectroscopy, tip-enhanced Raman and fluorescence imaging and spectroscopy, nanoscale infrared vibrational spectroscopy and so on. We intend to cover a wide spectral range from terahertz to visible in the near future.

We sincerely welcome researchers within the campus, across the country or even around the world to contact us for potential collaborations!

Selected Publications

F. Hu, Z. Fei. "Recent progress on exciton polaritons in layered transition-metal dichalcogenides (Invited paper) ". Adv. Optical Mater. 1901003 (2019)

F. Hu*, Y. Luan*, J. Speltz, D. Zhong, C. H. Liu, J. Yan, D. G. Mandrus, X. Xu, Z. Fei. "Imaging propagative exciton polaritons in atomically-thin WSe2 waveguides". Phys. Rev. B (Rapid Communications) 100, 121301(R) (2019) . *Equal contributions. Selected as Editors' suggestion.

F. Hu*, M. Kim*, Y. Zhang, Y. Luan, K. M. Ho, Y. Shi, C. Z. Wang, X. Wang, Z. Fei. "Tailored Plasmons in Pentacene/Graphene Heterostructures with Interlayer Electron Transfer". Nano Lett. 19, 6058-6064 (2019) * Equal contributions.

F. Hu*, Suprem R. Das*, Y. Luan*, T.-F. Chung, Y. P. Chen, Z. Fei. "Real-Space Imaging of the Tailored Plasmons in Twisted Bilayer Graphene". Phys. Rev. Lett. 119, 247402 (2017) . *Equal contributions.

F. Hu*, Y. Luan*, Z. Fei, I. Z. Palubski, M. D. Goldflam, S. Dai, J.-S. Wu, K. W. Post, G.C.A.M. Janssen, M. M. Fogler, D. N. Basov. "Imaging the localized plasmon resonance modes in graphene nanoribbons". Nano Lett. 17, 5423-5428 (2017) . *Equal contributions.

F. Hu, Y. Luan, M. E. Scott, J. Yan, D. G. Mandrus, X. Xu, Z. Fei. "Imaging exciton-polariton transport in MoSe2 waveguides". Nature Photonics 11, 356-360 (2017) .

Z. Fei, M. D. Goldflam, J.-S. Wu, S. Dai, M. Wagner, A. S. McLeod, M. K. Liu, K. W. Post, S. Zhu, G.C.A.M. Janssen, M. M. Fogler, D. N. Basov. "Edge and surface plasmons in graphene nanoribbons". Nano Lett. 15, 8271-8276 (2015).

Z. Fei, A. S. Rodin, W. Gannett, S. Dai, W. Regan, M. Wagner, M. K. Kiu, A. S. McLeod, G. Dominguez, M.Thiemens, M. M. Fogler, A. H. Castro-Neto, F. Keilmann, A. Zettl, R. Hillenbrand, M. M. Fogler, D. N. Basov. "Electronic and plasmonic phenomena at graphene grain boundaries" Nature Nanotechnol. 8, 821-825 (2013).

Z. Fei, A. S. Rodin, G. O. Andreev, W. Bao, A. S. McLeod, M. Wagner, L. M. Zhang, Z. Zhao, G. Dominguez, M. Thiemens, M. M. Fogler, A. H. Castro-Neto, C. N. Lau, F. Keilmann, D. N. Basov. "Gate-tuning of graphene plasmons revealed by infrared nano-imaging". Nature 487, 825 (2012).

- Click here for the complete list of publications.