CUED Publications database

Electrically controlled terahertz spatial light modulators with graphene arrays

Kakenov, N and Takan, T and Ozkan, VA and Balci, O and Polat, EO and Altan, H and Kocabas, C (2016) Electrically controlled terahertz spatial light modulators with graphene arrays. In: UNSPECIFIED.

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Abstract

© 2016 IEEE. Gate-tunable high-mobility electrons on atomically thin graphene layers provide a unique opportunity to control electromagnetic waves in a very broad spectrum. In this paper, we describe an electrically-controlled multipixel terahertz light modulators. The spatial light modulator is fabricated using two large-area graphene layers grown by chemical vapor deposition and transferred on THz transparent and flexible substrates. Room temperature ionic liquid, inserted between the graphene, provides mutual gating between the graphene layers. We used passive matrix addressing to control local charge density thus the THz transmittance. With this device configuration, we were able to obtain 5×5 arrays of graphene modulator with 65% modulation between 0.1 to 1.5 THz.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 22 Mar 2018 01:27
Last Modified: 24 Nov 2020 08:37
DOI: 10.1109/MWSYM.2016.7540001