Efficient interfacing photonic and long-range dielectric-loaded plasmonic waveguides

Yiting Chen, Volodymyr Zenin, Kristjan Leosson, Xueliang Shi, Michael Grøndahl Nielsen, Sergey I. Bozhevolnyi

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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Resumé

Long-range dielectric-loaded surface plasmon-polariton waveguides (LR-DLSPPWs) operating at telecom wavelengths are efficiently (end-fire) interfaced with photonic waveguides by taking advantage of very similar lateral mode field profiles in these waveguide configurations. The LR-DLSPPWs are formed by 1-μm-high and 1-μm-wide polymer ridges fabricated atop 15-nm-thin and 500-nm-wide gold stripes supported by a 289-nm-thick ormoclear polymer deposited on a low-index (1.34) layer of cytop, whereas gold stripes are absent in the photonic waveguide configuration that is identical to the plasmonic one in all other respects. The coupling efficiency between LR-DLSPPWs and photonic waveguides is numerically estimated to be 97%, decreasing by only a few percents for non-centered gold stripes (as long as a gold stripe is kept inside the polymer ridge). The fabricated LR-DLSPPWs coupled to photonic waveguides are first characterized using amplitude- and phase-resolved near-field imaging of propagating radiation that reveals very similar mode field distributions in these waveguides as well as their efficient interfacing. The coupling efficiency is then experimentally characterized using the cutback approach resulting in an average level of 75% per interface, while the LR-DLSPPW mode propagation length is estimated to be on average 0.3 mm. Possible reasons for differences between experimental and simulation results are discussed, indicating that a 3-nm-thin titanium layer (used for improving adhesion between gold and ormoclear) introduces substantial mode absorption. The results obtained open new perspectives for realization of hybrid photonic-plasmonic components and circuits.
OriginalsprogEngelsk
TidsskriftOptics Express
Vol/bind23
Udgave nummer7
Sider (fra-til)9100-9108
ISSN1094-4087
DOI
StatusUdgivet - 2015

Fingeraftryk

photonics
waveguides
polaritons
gold
ridges
polymers
propagation modes
configurations
near fields
adhesion
titanium
radiation
profiles
wavelengths

Citer dette

Chen, Yiting ; Zenin, Volodymyr ; Leosson, Kristjan ; Shi, Xueliang ; Nielsen, Michael Grøndahl ; Bozhevolnyi, Sergey I. / Efficient interfacing photonic and long-range dielectric-loaded plasmonic waveguides. I: Optics Express. 2015 ; Bind 23, Nr. 7. s. 9100-9108.
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title = "Efficient interfacing photonic and long-range dielectric-loaded plasmonic waveguides",
abstract = "Long-range dielectric-loaded surface plasmon-polariton waveguides (LR-DLSPPWs) operating at telecom wavelengths are efficiently (end-fire) interfaced with photonic waveguides by taking advantage of very similar lateral mode field profiles in these waveguide configurations. The LR-DLSPPWs are formed by 1-μm-high and 1-μm-wide polymer ridges fabricated atop 15-nm-thin and 500-nm-wide gold stripes supported by a 289-nm-thick ormoclear polymer deposited on a low-index (1.34) layer of cytop, whereas gold stripes are absent in the photonic waveguide configuration that is identical to the plasmonic one in all other respects. The coupling efficiency between LR-DLSPPWs and photonic waveguides is numerically estimated to be 97{\%}, decreasing by only a few percents for non-centered gold stripes (as long as a gold stripe is kept inside the polymer ridge). The fabricated LR-DLSPPWs coupled to photonic waveguides are first characterized using amplitude- and phase-resolved near-field imaging of propagating radiation that reveals very similar mode field distributions in these waveguides as well as their efficient interfacing. The coupling efficiency is then experimentally characterized using the cutback approach resulting in an average level of 75{\%} per interface, while the LR-DLSPPW mode propagation length is estimated to be on average 0.3 mm. Possible reasons for differences between experimental and simulation results are discussed, indicating that a 3-nm-thin titanium layer (used for improving adhesion between gold and ormoclear) introduces substantial mode absorption. The results obtained open new perspectives for realization of hybrid photonic-plasmonic components and circuits.",
keywords = "Waveguide , Surface plasmons, Plasmonics",
author = "Yiting Chen and Volodymyr Zenin and Kristjan Leosson and Xueliang Shi and Nielsen, {Michael Gr{\o}ndahl} and Bozhevolnyi, {Sergey I.}",
year = "2015",
doi = "10.1364/OE.23.009100",
language = "English",
volume = "23",
pages = "9100--9108",
journal = "Optics Express",
issn = "1094-4087",
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Efficient interfacing photonic and long-range dielectric-loaded plasmonic waveguides. / Chen, Yiting; Zenin, Volodymyr; Leosson, Kristjan; Shi, Xueliang; Nielsen, Michael Grøndahl; Bozhevolnyi, Sergey I.

I: Optics Express, Bind 23, Nr. 7, 2015, s. 9100-9108.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Efficient interfacing photonic and long-range dielectric-loaded plasmonic waveguides

AU - Chen, Yiting

AU - Zenin, Volodymyr

AU - Leosson, Kristjan

AU - Shi, Xueliang

AU - Nielsen, Michael Grøndahl

AU - Bozhevolnyi, Sergey I.

PY - 2015

Y1 - 2015

N2 - Long-range dielectric-loaded surface plasmon-polariton waveguides (LR-DLSPPWs) operating at telecom wavelengths are efficiently (end-fire) interfaced with photonic waveguides by taking advantage of very similar lateral mode field profiles in these waveguide configurations. The LR-DLSPPWs are formed by 1-μm-high and 1-μm-wide polymer ridges fabricated atop 15-nm-thin and 500-nm-wide gold stripes supported by a 289-nm-thick ormoclear polymer deposited on a low-index (1.34) layer of cytop, whereas gold stripes are absent in the photonic waveguide configuration that is identical to the plasmonic one in all other respects. The coupling efficiency between LR-DLSPPWs and photonic waveguides is numerically estimated to be 97%, decreasing by only a few percents for non-centered gold stripes (as long as a gold stripe is kept inside the polymer ridge). The fabricated LR-DLSPPWs coupled to photonic waveguides are first characterized using amplitude- and phase-resolved near-field imaging of propagating radiation that reveals very similar mode field distributions in these waveguides as well as their efficient interfacing. The coupling efficiency is then experimentally characterized using the cutback approach resulting in an average level of 75% per interface, while the LR-DLSPPW mode propagation length is estimated to be on average 0.3 mm. Possible reasons for differences between experimental and simulation results are discussed, indicating that a 3-nm-thin titanium layer (used for improving adhesion between gold and ormoclear) introduces substantial mode absorption. The results obtained open new perspectives for realization of hybrid photonic-plasmonic components and circuits.

AB - Long-range dielectric-loaded surface plasmon-polariton waveguides (LR-DLSPPWs) operating at telecom wavelengths are efficiently (end-fire) interfaced with photonic waveguides by taking advantage of very similar lateral mode field profiles in these waveguide configurations. The LR-DLSPPWs are formed by 1-μm-high and 1-μm-wide polymer ridges fabricated atop 15-nm-thin and 500-nm-wide gold stripes supported by a 289-nm-thick ormoclear polymer deposited on a low-index (1.34) layer of cytop, whereas gold stripes are absent in the photonic waveguide configuration that is identical to the plasmonic one in all other respects. The coupling efficiency between LR-DLSPPWs and photonic waveguides is numerically estimated to be 97%, decreasing by only a few percents for non-centered gold stripes (as long as a gold stripe is kept inside the polymer ridge). The fabricated LR-DLSPPWs coupled to photonic waveguides are first characterized using amplitude- and phase-resolved near-field imaging of propagating radiation that reveals very similar mode field distributions in these waveguides as well as their efficient interfacing. The coupling efficiency is then experimentally characterized using the cutback approach resulting in an average level of 75% per interface, while the LR-DLSPPW mode propagation length is estimated to be on average 0.3 mm. Possible reasons for differences between experimental and simulation results are discussed, indicating that a 3-nm-thin titanium layer (used for improving adhesion between gold and ormoclear) introduces substantial mode absorption. The results obtained open new perspectives for realization of hybrid photonic-plasmonic components and circuits.

KW - Waveguide

KW - Surface plasmons

KW - Plasmonics

U2 - 10.1364/OE.23.009100

DO - 10.1364/OE.23.009100

M3 - Journal article

VL - 23

SP - 9100

EP - 9108

JO - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 7

ER -