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Plasmonic-Organic and Silicon-Organic Hybrid Modulators for High-Speed Signal Processing

Ummethala, Sandeep

Abstract (englisch):

High-speed electro-optic (EO) modulators are key devices for optical communications, microwave photonics, and for broadband signal processing. Among the different material platforms for high-density photonic integrated circuits (PIC), silicon photonics sticks out because of CMOS foundries specialized in PIC fabrication. However, the absence of the Pockels effect in silicon renders EO modulators with high-efficiency and large modulation bandwidth difficult.

In this dissertation, plasmonic and photonic slot waveguide modulators are investigated. The devices are built on the silicon platform and are combined with highly-efficient organic EO materials. Using such a hybrid platform, we realize compact and fast plasmonic-organic hybrid (POH) and silicon-organic hybrid (SOH) modulators. As an application example, we demonstrate for the first time an advanced terahertz communication link by directly converting data on a 360 GHz carrier to a data stream on an optical carrier. For optical transmitter applications, we overcome the bandwidth limitation of conventional SOH modulators by introducing a high-k dielectric microwave slotline for guiding the modulating radio-frequency signal which is capacitively-coupled to the EO modulating region. ... mehr

Volltext §
DOI: 10.5445/IR/1000136059
Veröffentlicht am 16.08.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Institut für Photonik und Quantenelektronik (IPQ)
Publikationstyp Hochschulschrift
Publikationsdatum 16.08.2021
Sprache Englisch
Identifikator KITopen-ID: 1000136059
HGF-Programm 43.32.03 (POF IV, LK 01) Designed Optical Devices & Systems
Verlag Karlsruher Institut für Technologie (KIT)
Umfang xii, 166 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Elektrotechnik und Informationstechnik (ETIT)
Institut Institut für Photonik und Quantenelektronik (IPQ)
Prüfungsdatum 28.01.2021
Projektinformation EnTeraPIC (EU, FP7, 280145)
TeraSHAPE (EU, H2020, 773248)
SPP 2111 GOSPEL (DFG, DFG EIN, KO 4192/8-1)
SPP 2111; PACE (DFG, DFG KOORD, KO 4192/9-1)
Teraslice (EU, H2020, 863322)
Schlagwörter Silicon photonics, plasmonics, hybrid electro-optic modulators, therahertz-to-optical conversion
Referent/Betreuer Koos, C.
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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