Polymeric slot waveguide interferometers: Dissertation

Research output: ThesisDissertation

Abstract

Slot waveguide is a specific light-guiding structure with a property to enhance the optical field in a nanometer scale void of low refractive index (RI) material embedded between higher RI material rails. Typically, slot waveguides have been fabricated from high refractive index inorganic dielectrics or semiconductors, such as silicon or silicon nitride, and they operate in the near infrared (NIR) wavelength region. The slot waveguide structure enables strong light-ambient interaction, a property that is preferred, for instance, in integrated optical sensors utilizing the change of the refractive index as the sensing transduction signal. In this thesis; the characteristic properties of slot waveguides were studied as regards their usage in polymer platforms. The polymers are transparent in the visible and NIR wavelength region. In this work, the operation of the polymer slot waveguide was demonstrated for both visible and NIR wavelengths by using Young interferometer devices. For the device fabrication, the ultraviolet (UV) assisted nanoimprint moulding method was utilized. The emphasis was to demonstrate that the high performance slot waveguide sensor configuration is attainable with a simple low-cost fabrication method, enabling usage as disposable sensors. The bulk refractive index (RI) response of the slot waveguide-based Young interferometer was characterized with glucose - deionized water solutions. With this arrangement, an ambient RI change of 6.4*10-6 was measured. In the slot Young interferometer structure, both waveguide arms of the interferometer detect the bulk RI changes of the ambient material. This novel structure was proved to effectively compensate for thermo-optic originated response drift while maintaining high sensitivity against bulk RI change.
Original languageEnglish
QualificationDoctor Degree
Supervisors/Advisors
  • Karioja, Pentti, Supervisor
  • Lappalainen, Jyrki, Supervisor, External person
Award date29 Aug 2014
Place of PublicationEspoo
Publisher
Print ISBNs978-951-38-8271-6
Electronic ISBNs978-951-38-8272-3
Publication statusPublished - 2014
MoE publication typeG5 Doctoral dissertation (article)

Fingerprint

slots
interferometers
refractivity
waveguides
polymers
wavelengths
fabrication
theses
sensors
rails
optical measuring instruments
silicon nitrides
glucose
voids
platforms
optics
sensitivity
silicon
configurations
water

Keywords

  • slot waveguide
  • polymer waveguide
  • nanoimprint moulding
  • Young interferometer

Cite this

Hiltunen, M. (2014). Polymeric slot waveguide interferometers: Dissertation. Espoo: VTT Technical Research Centre of Finland.
Hiltunen, Marianne. / Polymeric slot waveguide interferometers : Dissertation. Espoo : VTT Technical Research Centre of Finland, 2014. 118 p.
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abstract = "Slot waveguide is a specific light-guiding structure with a property to enhance the optical field in a nanometer scale void of low refractive index (RI) material embedded between higher RI material rails. Typically, slot waveguides have been fabricated from high refractive index inorganic dielectrics or semiconductors, such as silicon or silicon nitride, and they operate in the near infrared (NIR) wavelength region. The slot waveguide structure enables strong light-ambient interaction, a property that is preferred, for instance, in integrated optical sensors utilizing the change of the refractive index as the sensing transduction signal. In this thesis; the characteristic properties of slot waveguides were studied as regards their usage in polymer platforms. The polymers are transparent in the visible and NIR wavelength region. In this work, the operation of the polymer slot waveguide was demonstrated for both visible and NIR wavelengths by using Young interferometer devices. For the device fabrication, the ultraviolet (UV) assisted nanoimprint moulding method was utilized. The emphasis was to demonstrate that the high performance slot waveguide sensor configuration is attainable with a simple low-cost fabrication method, enabling usage as disposable sensors. The bulk refractive index (RI) response of the slot waveguide-based Young interferometer was characterized with glucose - deionized water solutions. With this arrangement, an ambient RI change of 6.4*10-6 was measured. In the slot Young interferometer structure, both waveguide arms of the interferometer detect the bulk RI changes of the ambient material. This novel structure was proved to effectively compensate for thermo-optic originated response drift while maintaining high sensitivity against bulk RI change.",
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author = "Marianne Hiltunen",
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Polymeric slot waveguide interferometers : Dissertation. / Hiltunen, Marianne.

Espoo : VTT Technical Research Centre of Finland, 2014. 118 p.

Research output: ThesisDissertation

TY - THES

T1 - Polymeric slot waveguide interferometers

T2 - Dissertation

AU - Hiltunen, Marianne

N1 - Project code: 86128

PY - 2014

Y1 - 2014

N2 - Slot waveguide is a specific light-guiding structure with a property to enhance the optical field in a nanometer scale void of low refractive index (RI) material embedded between higher RI material rails. Typically, slot waveguides have been fabricated from high refractive index inorganic dielectrics or semiconductors, such as silicon or silicon nitride, and they operate in the near infrared (NIR) wavelength region. The slot waveguide structure enables strong light-ambient interaction, a property that is preferred, for instance, in integrated optical sensors utilizing the change of the refractive index as the sensing transduction signal. In this thesis; the characteristic properties of slot waveguides were studied as regards their usage in polymer platforms. The polymers are transparent in the visible and NIR wavelength region. In this work, the operation of the polymer slot waveguide was demonstrated for both visible and NIR wavelengths by using Young interferometer devices. For the device fabrication, the ultraviolet (UV) assisted nanoimprint moulding method was utilized. The emphasis was to demonstrate that the high performance slot waveguide sensor configuration is attainable with a simple low-cost fabrication method, enabling usage as disposable sensors. The bulk refractive index (RI) response of the slot waveguide-based Young interferometer was characterized with glucose - deionized water solutions. With this arrangement, an ambient RI change of 6.4*10-6 was measured. In the slot Young interferometer structure, both waveguide arms of the interferometer detect the bulk RI changes of the ambient material. This novel structure was proved to effectively compensate for thermo-optic originated response drift while maintaining high sensitivity against bulk RI change.

AB - Slot waveguide is a specific light-guiding structure with a property to enhance the optical field in a nanometer scale void of low refractive index (RI) material embedded between higher RI material rails. Typically, slot waveguides have been fabricated from high refractive index inorganic dielectrics or semiconductors, such as silicon or silicon nitride, and they operate in the near infrared (NIR) wavelength region. The slot waveguide structure enables strong light-ambient interaction, a property that is preferred, for instance, in integrated optical sensors utilizing the change of the refractive index as the sensing transduction signal. In this thesis; the characteristic properties of slot waveguides were studied as regards their usage in polymer platforms. The polymers are transparent in the visible and NIR wavelength region. In this work, the operation of the polymer slot waveguide was demonstrated for both visible and NIR wavelengths by using Young interferometer devices. For the device fabrication, the ultraviolet (UV) assisted nanoimprint moulding method was utilized. The emphasis was to demonstrate that the high performance slot waveguide sensor configuration is attainable with a simple low-cost fabrication method, enabling usage as disposable sensors. The bulk refractive index (RI) response of the slot waveguide-based Young interferometer was characterized with glucose - deionized water solutions. With this arrangement, an ambient RI change of 6.4*10-6 was measured. In the slot Young interferometer structure, both waveguide arms of the interferometer detect the bulk RI changes of the ambient material. This novel structure was proved to effectively compensate for thermo-optic originated response drift while maintaining high sensitivity against bulk RI change.

KW - slot waveguide

KW - polymer waveguide

KW - nanoimprint moulding

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M3 - Dissertation

SN - 978-951-38-8271-6

T3 - VTT Science

PB - VTT Technical Research Centre of Finland

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Hiltunen M. Polymeric slot waveguide interferometers: Dissertation. Espoo: VTT Technical Research Centre of Finland, 2014. 118 p.