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Item type:Publication, Access status: without files , Low Dielectric Contrast Photonic Crystals(2015-06-10); Photonic crystal structures bear the promise of confining light to structure sizes comparable to the optical wavelength and hence enabling micro optical devices with extremely small footprint. Nonlinear optical (NLO) polymers with large Pockels coefficients have the potential to achieve electro-optic modulators at very low driving voltages. Hence, incorporating photonic crystal structures in NLO polymers is an interesting approach to enable light manipulation on very compact dimensions. However, the comparatively low dielectric contrast of polymers poses limits on the light confinement and performance of devices made in such a material system. In this chapter polymer based photonic crystals are investigated and the maximum achievable quality factors of microcavities in low refractive index contrast materials are evaluated. The photonic bandgap properties of polymer slab waveguide based photonic crystals are described and experimentally confirmed. Different types of microcavities are studied including H1 and L3 cavities, as well as double and multistep heterostructures.Publicationtype: Book Part92 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Multi GHz Modulation in ultra compact organic-inorganic structuresIn this letter we demonstrate broadband electro-optic modulation with frequencies up to 40 GHz in slotted photonic crystal waveguides based on silicon-on-insulator substrates covered and infiltrated with a nonlinear optical polymer. Two dimensional photonic crystal waveguides in silicon enable integrated optical devices with an extremely small geometrical footprint on the scale of micrometers. The slotted waveguide design optimizes the overlap of the optical and electric field in the second order nonlinear optical medium and hence the interaction of the optical and electric wave.Publicationtype: Conference Paper41 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , GHz-Electrooptic Modulation in Silicon-Organic Hybrid Nanophotonic StructuresPublicationtype: Conference Paper59 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Tunable photonic crystal devicesNonlinear optical polymers with large Pockels coefficients have the potential to achieve electro-optic modulators at very low driving voltages. In this thesis polymer based photonic crystals were investigated and the maximum achievable quality factors of microcavities in low refractive index contrast materials are evaluated. Concepts were developed to use resonant photonic crystal structures in Silicon-on-Insulator infiltrated with electro-optically active polymers. The conjunction of these materials enables micrometer sized devices with very high modulation speeds. Modulator devices were fabricated, optically characterized and electro-optic modulation with 40 GHz bandwidth demonstrated.Publicationtype: Doctoral Thesis584 1958 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , 40 GHz electro-optic modulation in hybrid silicon-organic slotted photonic crystal waveguides(Optical Society of America (OSA), 2010); ; ; ; In this Letter we demonstrate broadband electro-optic modulation with frequencies of up to 40GHz in slotted photonic crystal waveguides based on silicon-on-insulator substrates covered and infiltrated with a nonlinear optical polymer. Two-dimensional photonic crystal waveguides in silicon enable integrated optical devices with an extremely small geometric footprint on the scale of micrometers. The slotted waveguide design optimizes the overlap of the optical and electric fields in the second-order nonlinear optical medium and, hence, the interaction of the optical and electric waves.Publicationtype: Journal ArticleScopus© Citations 70 1229 846 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Electro-optical modulator in a polymer-infiltrated silicon slotted photonic crystal waveguide heterostructure resonatorWe present a novel concept of a compact, ultra fast electro-optic modulator, based on photonic crystal resonator structures that can be realized in two dimensional photonic crystal slabs of silicon as core material employing a nonlinear optical polymer as infiltration and cladding material. The novel concept is to combine a photonic crystal heterostructure cavity with a slotted defect waveguide. The photonic crystal lattice can be used as a distributed electrode for the application of a modulation signal. An electrical contact is hence provided while the optical wave is kept isolated from the lossy metal electrodes. Thereby, well known disadvantages of segmented electrode designs such as excessive scattering are avoided. The optical field enhancement in the slotted region increases the nonlinear interaction with an external electric field resulting in an envisaged switching voltage of approximately 1 V at modulation speeds up to 100 GHz.Publicationtype: Journal ArticleScopus© Citations 89 840 826 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Electro-optic modulation in slotted resonant photonic crystal heterostructures(American Institute of Physics (AIP), 2009); ; ; ; Two dimensional photonic crystal waveguides in high index materials enable integrated optical devices with an extremely small geometrical footprint on the scale of micrometers. Slotted waveguides are based on the guiding of light in low refractive index materials and a field enhancement in this particular region of the device. In this letter we experimentally demonstrate electro-optic modulation in slotted photonic crystal waveguides based on silicon-on-insulator substrates covered and infiltrated with nonlinear optical polymers. A photonic crystal heterostructure is used to create a cavity, while simultaneously serving as an electrical connection from the slot to the metal electrodes that carry the modulation signal.Publicationtype: Journal ArticleScopus© Citations 100 1038 967 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Omnidirectional photonic band gap in polymer photonic crystal slabsIn this letter, we report on the experimental observation of a complete in-plane photonic band gap for transverse-electric-like polarized modes in a polymer photonic crystal slab with a triangular array of holes. We performed transmission measurements on two-dimensional photonic crystal slabs in both principal directions of the triangular lattice. For a propagation distance of 40 lattice constants, the transmission was effectively suppressed regardless of propagation direction below −15 dB over a bandwidth of 65 nm. The experimental results are in excellent agreement with theoretical predictions obtained from band diagram calculations and finite integration time domain techniques.Publicationtype: Journal ArticleScopus© Citations 9 1140 637