Journal
OPTICS EXPRESS
Volume 30, Issue 13, Pages 23260-23269Publisher
Optica Publishing Group
DOI: 10.1364/OE.460293
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Funding
- Collaborative Innovation Centre of Solid-State Lighting and Energy-Saving Electronics
- China Postdoctoral Science Foundation [2019T120090]
- National Natural Science Foundation of China [61822404, 61875104, 61904093, 61927811, 61974080, 61975093, 61991443]
- National Key Research and Development Program of China [2018YFB2201701]
- Key Lab Program of BNRist [BNR2019ZS01005]
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A membrane multiple quantum well electro-optical modulator using high-k radio-frequency slot waveguides is proposed for sub-terahertz bandwidth, offering improved modulation efficiency and bandwidth, as well as reduced insertion loss.
A membrane multiple quantum well (MQW) electro-optical (EO) modulator exploiting low loss high-k radio-frequency (RF) slot waveguides is proposed for sub-terahertz bandwidth. By employing high-k barium titanate (BTO) claddings in place of doped InP cladding layers in traditional InP-based MQW modulators, the proposed modulator exhibits enhanced modulation efficiency and bandwidth as well as reduced insertion loss. A low half-wave voltage-length product of 0.24 V.cm is estimated, together with over 240 GHz bandwidth for a 2-mm-long modulation region, thus allowing sub-terahertz operation. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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