Ultrasensitive terahertz/infrared waveguide modulators based on multilayer graphene metamaterials

Irina Khromova, Andrei Andryieuski, Andrei Lavrinenko

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This paper studies and classifies the electromagnetic regimes of multilayer graphene-dielectric artificial metamate- rials in the terahertz/infrared range. The employment of such composites for waveguide-integrated modulators is analysed and three examples of novel tunable devices are presented. The first one is a modulator with excellent ON-state transmission and very high modulation depth: > 38 dB at 70 meV graphene’s electrochemical potential (Fermi energy) change. The second one is a modulator with extreme sensitivity towards graphene’s Fermi energy - a minute 1 meV variation of the latter leads to > 13 . 2 dB modulation depth. The third one is a tunable waveguide-based passband filter. The narrow-band cut-off con- ditions around the ON-state allow the latter to shift its central frequency by 1 . 25% per every meV graphene’s Fermi energy change
Original languageEnglish
JournalLaser & Photonics Reviews
Volume8
Issue number6
Pages (from-to)916-923
Number of pages8
ISSN1863-8880
DOIs
Publication statusPublished - 2014

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