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[IEEE 2019 SBFoton International Optics and Photonics Conference (SBFoton IOPC) - Sao Paulo, Brazil (2019.10.7-2019.10.9)] 2019 SBFoton International Optics and Photonics Conference (SBFoton IOPC) - Graphene Coplanar Capacitor for Electro-Optical Modulation
摘要： We present an all-fiber graphene electro-absorption optical modulator built onto a side-polished optical fiber in a coplanar capacitor configuration. For a maximum PMMA superstrate thickness of 1 μm and for a gap of 0.1 and 1 μm it was possible to obtain, respectively, a maximum modulation depth of 7.6 dB/mm and 5.3 dB/mm, a capacitance of 98.4 fF/mm and 63.1 fF/mm and frequencies of 16.2 GHz and 25.3 GHz. The contribution of this work is to demonstrate a low capacitance design with an optimized process fabrication for optical modulation.
关键词： graphene-based modulator,coplanar capacitor,side-polished optical fiber,electro-absorption
更新于2025-09-11 14:15:04
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[IEEE 2017 IEEE MTT-S International Microwave and RF Conference (IMaRC) - AHMEDABAD, India (2017.12.11-2017.12.13)] 2017 IEEE MTT-S International Microwave and RF Conference (IMaRC) - Frequency Agile Monolithic Inset Fed Microstrip Patch Antenna Based on Barium Strontium Titanate (Ba<inf>x</inf>Sr<inf>1-x</inf>TiO<inf>3</inf>) Ferroelectric Substrate
摘要： This paper demonstrates frequency agile inset fed microstrip patch antenna built on Barium Strontium Titanate (BST: BaxSr1-xTiO3) substrate. Concept and design methodology of X-band frequency agile microstrip patch antenna monolithically integrated with coplanar capacitor, bias tee and DC block capacitor are discussed. Antenna design is carried out on 0.5μm thick Ba0.6Sr0.4TiO3 hosted by 1mm Quartz substrate. C-V characterization of this BST film is also performed and presented. Microstrip antenna on BST film has been realized using SolGel method and shows 50MHz frequency tunability during measurement for bias voltage variation from 0V to 154V. The gain and pattern purity of the antenna is maintained over this bandwidth.
关键词： Frequency agility,Microstrip Patch Antenna,Barium Strontium Titanate,Coplanar capacitor
更新于2025-09-10 09:29:36