Dynamically Programmable Terahertz Holographic Metasurface using CMOS IC Tiling

Suresh Venkatesh, Xuyang Lu, Hooman Saeidi, Kaushik Sengupta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this article, we design and demonstrate a multi-functional, digitally programmable metasurface at 0.3 THz fabricated using industry standard 65 nm CMOS (complementary metal oxide semiconductor) process. Each metasurface tile consists of 12×12 periodic array of unit cells and is later tiled to create a 2×2 array. This scalable approach helps to create larger programmable apertures without any overhead on cost and performance. Each unit cell in the metasurface is a programmable multi-split-ring resonator consisting of eight MOSFETs at the capacitive gaps. These transistors act as dynamically programmable digital switches which alter both amplitude and phase transmission properties of the metasurface independently. We experimentally demonstrate multi-functional applications namely, high-speed beam modulation with a switching ON/OFF ratio of ~25 dB at a maximum clock speed of 5 GHz and beamforming capability of ± 30°. In addition, we also simulate and experimentally verify spatial wavefront manipulation using binary-amplitude-only holography technique at 0.3 THz.

Original languageEnglish (US)
Title of host publication2021 Conference on Lasers and Electro-Optics, CLEO 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781943580910
StatePublished - May 2021
Event2021 Conference on Lasers and Electro-Optics, CLEO 2021 - Virtual, Online, United States
Duration: May 9 2021May 14 2021

Publication series

Name2021 Conference on Lasers and Electro-Optics, CLEO 2021 - Proceedings

Conference

Conference2021 Conference on Lasers and Electro-Optics, CLEO 2021
Country/TerritoryUnited States
CityVirtual, Online
Period5/9/215/14/21

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Atomic and Molecular Physics, and Optics

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