dc.contributor.author | Fan, Zhiyuan | |
dc.contributor.author | Dutta-Gupta, Shourya | |
dc.contributor.author | Gladstone, Ran | |
dc.contributor.author | Trendafilov, Simeon | |
dc.contributor.author | Bosch, Melissa | |
dc.contributor.author | Jung, Minwoo | |
dc.contributor.author | Iyer, Ganjigunte R. Swathi | |
dc.contributor.author | Giles, Alexander J. | |
dc.contributor.author | Shcherbakov, Maxim | |
dc.contributor.author | Feigelson, Boris | |
dc.contributor.author | Caldwell, Joshua D. | |
dc.contributor.author | Allen, Monica | |
dc.contributor.author | Allen, Jeffery | |
dc.contributor.author | Shvets, Gennady | |
dc.date.accessioned | 2020-06-17T21:28:41Z | |
dc.date.available | 2020-06-17T21:28:41Z | |
dc.date.issued | 2019-08 | |
dc.identifier.citation | Fan, Z., Dutta-Gupta, S., Gladstone, R., Trendafilov, S., Bosch, M., Jung, M., Iyer, G., Giles, A. J., Shcherbakov, M., Feigelson, B., Caldwell, J. D., Allen, M., Allen, J., & Shvets, G. (2019). Electrically defined topological interface states of graphene surface plasmons based on a gate-tunable quantum Bragg grating, Nanophotonics, 8(8), 1417-1431. doi: https://doi.org/10.1515/nanoph-2019-0108 | en_US |
dc.identifier.issn | 2192-8606 | |
dc.identifier.other | eISSN: 2192-8614 | |
dc.identifier.uri | http://hdl.handle.net/1803/10049 | |
dc.description.abstract | A periodic metagate is designed on top of a boron nitride-graphene heterostructure to modulate the local carrier density distribution on the monolayer graphene. This causes the bandgaps of graphene surface plasmon polaritons to emerge because of either the interaction between the plasmon modes, which are mediated by the varying local carrier densities, or their interaction with the metal gates. Using the example of a double-gate graphene device, we discuss the tunable band properties of graphene plasmons due to the competition between these two mechanisms. Because of this, a bandgap inversion, which results in a Zak phase switching, can be realized through electrostatic gating. Here we also show that an anisotropic plasmonic topological edge state exists at the interface between two graphene gratings of different Zak phases. While the orientation of the dipole moments can differentiate the band topologies of each graphene grating, the angle of radiation remains a tunable property. This may serve as a stepping stone toward active control of the band structures of surface plasmons for potential applications in optical communication, wave steering, or sensing. | en_US |
dc.description.sponsorship | Funding support from the Office of Naval Research (Grant#N00014-17-1-2161), UDRI (Grant#RSC17004), the National Science Foundation (Grants No. DMR-1741788 and No. DMR-1719875), and the Army Research Office (Grant No. W911NF-16-1-0319) is acknowledged. M. J. acknowledges the support by the Kwanjeong Fellowship from the Kwanjeong Educational Foundation. J.A. and M.A. are thankful for support from AFOSR lab task 17RWCOR398 (PO: Dr K Caster), and S. T. thanks the AFRL and the NRC RAP fellowship for their support. S. I. would like to thank the ASEE fellowship and NRL for supporting this research work. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Nanophotonics | en_US |
dc.rights | © 2019 Zhiyuan Fan and Gennady Shvets et al., published by De Gruyter, Berlin/Boston. This work is licensed under the Creative Commons Attribution 4.0 Public License. BY 4.0 | |
dc.source.uri | https://www.degruyter.com/view/journals/nanoph/8/8/article-p1417.xml?tab_body=pdf-74962 | |
dc.subject | graphene plasmons | en_US |
dc.subject | band topology | en_US |
dc.subject | active metasurface | en_US |
dc.subject | topological interface state | en_US |
dc.title | Electrically defined topological interface states of graphene surface plasmons based on a gate-tunable quantum Bragg grating | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1515/nanoph-2019-0108 | |