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Design and analysis of ultra-compact EO polymer modulators based on hybrid plasmonic microring resonators
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO. 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), Materials- and Nano Physics, Optics and Photonics, OFO. KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.ORCID iD: 0000-0001-5967-2651
2013 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 21, no 17, 20041-20051 p.Article in journal (Refereed) Published
Abstract [en]

Ultra-compact EO polymer modulators based on hybrid plasmonic microring resonators are proposed, simulated and analyzed. Comparing with Si slot microring modulator, hybrid plasmonic microring modulator shows about 6-times enhancement of the figure of merit when the bending radius is around 510 nm, due to its much larger intrinsic quality factor in sub-micron radius range. Influences of the EO polymer height and Si height on the device's performance are analyzed and optimal design is given. When operating with a bias of 3.6V, the proposed device has optical modulation amplitude of 0.8 and insertion loss of about 1 dB. The estimated power consumption is about 5 fJ/bit at 100 GHz.

Place, publisher, year, edition, pages
2013. Vol. 21, no 17, 20041-20051 p.
Keyword [en]
Bending radius, Design and analysis, Figure of merits, Intrinsic quality factors, Microring modulator, Microring resonator, Modulation amplitudes, Optimal design
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-129455DOI: 10.1364/OE.21.020041ISI: 000323830500059Scopus ID: 2-s2.0-84883250086OAI: oai:DiVA.org:kth-129455DiVA: diva2:653503
Funder
Swedish Research Council, VR-621-2010-4379
Note

QC 20131004

Available from: 2013-10-04 Created: 2013-09-30 Last updated: 2017-12-06Bibliographically approved
In thesis
1. Design, fabrication and characterization of plasmonic components based on silicon nanowire platform
Open this publication in new window or tab >>Design, fabrication and characterization of plasmonic components based on silicon nanowire platform
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Optical interconnects based on CMOS compatible photonic integrated circuits are regarded as a promising technique to tackle the issues traditional electronics faces, such as limited bandwidth, latency, vast energy consumption and so on. In recent years, plasmonic integrated components have gained great attentions due to the properties of nano-scale confinement, which may potentially bridge the size mismatch between photonic and electronic circuits. Based on silicon nanowire platform, this thesis work studies the design, fabrication and characterization of several integrated plasmonic components, aiming to combine the benefits of Si and plasmonics.

The basic theories of surface plasmon polaritons are introduced in the beginning, where we explain the physics behind the diffraction-free confinement. Numerical methods frequently used in the thesis including finite-difference time-domain method and finite-element method are then reviewed. We summarize the device fabrication techniques such as film depositions, e-beam lithography and inductively coupled plasma etching as well as characterization methods, such as direct measurement method, butt coupling, grating coupling etc.

Fabrication results of an optically tunable silicon-on-insulator microdisk and III-V cavities in applications as light sources for future nanophotonics interconnects are briefly discussed. Afterwards we present in details the experimental demonstrations and novel design of plasmonic components.

Hybrid plasmonic waveguides and directional couplers with various splitting ratios are firstly experimentally demonstrated. The coupling length of two 170 nm wide waveguides with a separation of 140 nm is only 1.55 µm. Secondly, an ultracompact polarization beam splitter with a footprint of 2×5.1 μm2 is proposed. The device features an extinction ratio of 12 dB and an insertion loss below 1.5 dB in the entire C-band. Thirdly, we show that plasmonics offer decreased bending losses and enhanced Purcell factor for submicron bends. Novel hybrid plasmonic disk, ring and donut resonators with radii of ~ 0.5 μm and 1 μm are experimentally demonstrated for the first time. The Q-factor of disks with 0.5 μm radii are                         , corresponding to Purcell factors of . Thermal tuning is also presented. Fourthly, we propose a design of electro-optic polymer modulator based on plasmonic microring. The figure of merit characterizing modulation efficiency is 6 times better comparing with corresponding silicon slot polymer modulator. The device exhibits an insertion loss below 1 dB and a power consumption of 5 fJ/bit at 100 GHz. At last, we propose a tightly-confined waveguide and show that the radius of disk resonators based on the proposed waveguide can be shrunk below 60 nm, which may be used to pursue a strong light-matter interaction.

The presented here novel components confirm that hybrid plasmonic structures can play an important role in future inter- and intra-core computer communication systems.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2014. xii, 76 p.
Series
TRITA-ICT/MAP AVH, ISSN 1653-7610 ; 2014:05
Keyword
Planar integrated circuit, silicon photonics, plasmonics, subwavelength, directional coupler, polarization beam splitter, disk resonator, ring resonator, finite-difference time-domain, photonic crystal, electro-optic polymer, Purcell factor.
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-143953 (URN)978-91-7595-060-0 (ISBN)
Public defence
2014-04-25, Sal D, Forum, Isafjordsgatan 39, Kista, 10:00 (English)
Opponent
Supervisors
Funder
Swedish Research Council, VR-621-2010-4379
Note

QC 20140404

Available from: 2014-04-04 Created: 2014-04-03 Last updated: 2016-03-07Bibliographically approved

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Wosinski, Lech

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