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Single-walled carbon nanotube layers for millimeter-wave beam steering
KTH, School of Electrical Engineering and Computer Science (EECS), Micro and Nanosystems.ORCID iD: 0000-0003-0368-1668
KTH, School of Electrical Engineering and Computer Science (EECS), Micro and Nanosystems.ORCID iD: 0000-0003-1443-403x
KTH, School of Electrical Engineering and Computer Science (EECS), Micro and Nanosystems.ORCID iD: 0000-0003-3339-9137
2019 (English)In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372Article in journal (Refereed) Published
Abstract [en]

The ability to efficiently transmit and manipulate high-frequency signals poses major challenges resulting in a lack of active and reconfigurable millimeter-wave and terahertz devices that are needed to enable beyond-5G broadband communication systems. Here, thin single-walled carbon nanotube (SWCNT) layers are introduced as a tunable impedance surface for millimeter-waves. Carbon nanotube layers are integrated with dielectric rod waveguides. Their surface impedance, tuned by light, is shown to modify the wave propagation inside the waveguide. A direct application of the effect is a phase shifter, demonstrated experimentally and by numerical simulations. Additionally, an antenna array of two dielectric waveguides, one covered in SWCNTs, is designed and fabricated. The proof-of-concept illustrates optically-controlled beam steering enabled by carbon nanotubes, and directions for further device optimizations are provided. These findings demonstrate thin SWCNT layers as an optically-reconfigurable element, suitable for broadband millimeter-wave communications.

Place, publisher, year, edition, pages
2019.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-255274DOI: 10.1039/c9nr02705jISI: 000484297400017Scopus ID: 2-s2.0-85070838328OAI: oai:DiVA.org:kth-255274DiVA, id: diva2:1339063
Funder
EU, Horizon 2020, 675683EU, Horizon 2020, 616846
Note

QC 20190729

Available from: 2019-07-25 Created: 2019-07-25 Last updated: 2019-10-01Bibliographically approved

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