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Slot hybrid plasmonic ring resonator used for optical sensors and modulators
KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.ORCID iD: 0000-0003-3618-6049
KTH, School of Biotechnology (BIO). KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.ORCID iD: 0000-0001-5967-2651
2015 (English)In: Asia Communications and Photonics Conference, ACPC 2015, 2015Conference paper, Published paper (Refereed)
Abstract [en]

We theoretically and experimentally investigate performance of slot hybrid plasmonic rings, with better sensitivity regarding tested liquids than Si-based ones. This component can also be employed as high-efficiency optical modulators with active nonlinear material. © 2015 OSA.

Place, publisher, year, edition, pages
2015.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-195156Scopus ID: 2-s2.0-84971613751ISBN: 9781943580064 (print)OAI: oai:DiVA.org:kth-195156DiVA: diva2:1045011
Conference
Asia Communications and Photonics Conference, ACPC 2015, 19 November 2015 through 23 November 2015
Note

Correspondence Address: Sun, X.; Laboratory of Photonics and Microwave Engineering, Royal Institute of Technology (KTH), Electrum 229, Sweden; email: xus@kth.se. QC 20161108

Available from: 2016-11-08 Created: 2016-11-02 Last updated: 2017-04-27Bibliographically approved
In thesis
1. Hybrid Plasmonic Devices for Optical Communication and Sensing
Open this publication in new window or tab >>Hybrid Plasmonic Devices for Optical Communication and Sensing
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Hybrid plasmonic (HP) waveguides, a multi-layer waveguide structure supporting a hybrid mode of surface plasmonics and Si photonics, is a compromise way to integrate plasmonic materials into Si or SOI platforms, which can guide optical waves of sub-wavelength size, and with relative low propagation loss. In this thesis, several HP waveguides and devices are developed for the purposes of optical communications and sensing. The single-slot HP ring resonator sensor with 2.6µm radius can give a quality factor (factor) of 1300 at the communication wavelength of 1.5µm with a device sensitivity of 102nm/RIU (refractive index unit). The Mach-Zehnder interferometer (MZI) with a 40µm double-slot HP waveguide has a device sensitivity around 474nm/RIU. The partly open silicon side-coupled double-slot HP ring resonator has a device sensitivity of 687.5nm/RIU, with a Q factor over 1000 after optimization. Further, an all-optical switching HP donut resonator with a photothermal plasmonic absorber is developed, utilizing the thermal expansion effect of silicon to shift the resonant peak of the HP resonator. The active area has a radius of 10µm to match the core size of a single-mode fiber. By applying 10mW power of the driving laser to the absorber, the resonator transmitted power can be changed by 15dB, with an average response time of 16µs. Using the same fabrication flow, and removing the oxide materials using hydrogen fluoride wet etching, a hollow HP waveguide is fabricated for liquid sensing applications. The experimentally demonstrated waveguide sensitivity is about 0.68, which is more than twice that of pure Si waveguide device. Microelectromechanical systems (MEMS) can also be integrated into vertical HP waveguides. By tuning the thickness of the air gap, over 20dB transmitted power change was experimentally demonstrated. This can be used for optical switching applications by either changing the absorption or phase of the HP devices.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2017. 74 p.
Series
TRITA-FYS, ISSN 0280-316X ; 2017:24
National Category
Telecommunications Nano Technology
Research subject
Physics
Identifiers
urn:nbn:se:kth:diva-205974 (URN)978-91-7729-365-1 (ISBN)
Public defence
2017-05-22, Sal C, Electrum, Kistagången 16, Kista, 10:00 (English)
Opponent
Supervisors
Note

QC 20170427

Available from: 2017-04-27 Created: 2017-04-25 Last updated: 2017-04-28Bibliographically approved

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