Si slot waveguide
The design, realization, and characterization of a compact Si wire to slot waveguide coupler with 3-dB bandwidth of nm are presented. The coupler footprint is. Pulsed electrical excitation Modal gain in Si slot waveguide. Electroluminescence from Er:Si-nc films 15 nm Film Ar/O 2 ion-beam sputtered Er:Si-nc films. The silicon cross-slot waveguide presented here is taken from an article from Helsinki University of Technology, Silicon slot waveguide designed in FIMMWAVE.
Coupled strip-slot waveguide design for dispersion compensation
Optical modulation and detection in slotted silicon waveguides. In vertical slot-waveguides, the slot and strips widths are defined by electron- or photo-lithography and dry etching techniques whereas in horizontal slot-waveguides the slot and strips thicknesses are defined by a thin-film deposition technique or thermal oxidation. Since wave propagation is due to total internal reflection, there is no interference effect involved and the slot-structure exhibits very low wavelength sensitivity. The simulation and analysis of design has been carried out by finite difference time domain method. Highly dispersive slot waveguides.
The design is based on a coupled strip slot waveguide with a strip slot separation of air medium. Resonance between the strip waveguide and slot waveguide has been utilized to achieve high dispersion. The simulation and analysis of design has been carried out by finite difference time domain method. The resonance wavelength and magnitude of the dispersion can be fine tuned by varying the parameters strip width, slot width, and strip slot separation.
Such a waveguide structure should find applications in the design of integrated-optic dispersion compensators for optical telecommunication and ultrafast waveguide lasers.
Ultracompact corner-mirrors and T-branches in silicon-on-insulator. Optical modulation and detection in slotted silicon waveguides. Optical slot-waveguide based biochemical sensors. Sensors 9, — Google Scholar Barrios, C. Electrically driven silicon resonant light emitting device based on slot-waveguide. Basic structures for photonic integrated circuits in Silicon-on-insulator.
Integrated-optic dispersion compensator that uses chirped gratings. Photonic-bandgap microcavities in optical waveguides. Guided modes of nonlinear slot waveguides. Nonlinear silicon-on- insulator waveguides for all-optical signal processing. Performance of polycrystalline silicon waveguide devices for compact on-chip optical interconnection.
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E-field profile of a 2D slot-waveguide. E-vector is parallel to the y-axis E-field distribution of a 3D slot-waveguide. Major E-field component is parallel to the x-axis Given that the slot critical dimension distance between the high-index slabs or strips is comparable to the exponential decay length of the fundamental eigenmode of the guided-wave structure, the resulting E-field normal to the high-index-contrast interfaces is enhanced in the slot and remains high across it.
The power density in the slot is much higher than that in the high-index regions. Since wave propagation is due to total internal reflection, there is no interference effect involved and the slot-structure exhibits very low wavelength sensitivity. Since these pioneering works, several guided-wave configurations based on the slot-waveguide concept have been proposed and demonstrated. Relevant examples are the following: In , researchers at the Massachusetts Institute of Technology proposed to use multiple slot regions in the same guided-wave structure multi-slot waveguide in order to increase the optical field in the low-refractive-index regions.
They showed concentration of optical energy within a subwavelength-scale air hole running down the length of a photonic-crystal fiber. Hybrid slot having vertical slot in one waveguide and horizontal slot in the other assisted polarization beam splitter is also numerically demonstrated. Though, the losses are high for such slot structures, this scheme exploiting the asymmetric slots may have potential to design very compact optical directional couplers and polarization beam splitters for on-chip integrated optical devices.
These processing tools include electron beam lithography , photolithography , chemical vapour deposition [usually low-pressure chemical vapour deposition LPCVD or plasma enhanced chemical vapour deposition PECVD ], thermal oxidation , reactive-ion etching and focused ion beam.
In vertical slot-waveguides, the slot and strips widths are defined by electron- or photo-lithography and dry etching techniques whereas in horizontal slot-waveguides the slot and strips thicknesses are defined by a thin-film deposition technique or thermal oxidation.
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