Sökning: "waveguiding properties"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden waveguiding properties.

  1. 1. Ferroelectric Na0.5K0.5NbO3 as an electro-optic material

    Författare :Mats Blomqvist; KTH; []
    Nyckelord :ferroelectrics; sodium potassium niobates; thin films; rf-magnetron sputtering; waveguiding; refractive index; prism coupling; dielectric tunability;

    Sammanfattning : Ferroelectrics are a group of advanced electronic materialswith a wide variety of properties useful in applications suchas memory devices, resonators and filters, infrared sensors,microelectromechanical systems, and optical waveguides andmodulators. Among the oxide perovskite-structured ferroelectricthin film materials sodium potassium niobate or Na0. LÄS MER

  3. 2. Electro-Optical Na0.5K0.5NbO3 Films

    Författare :Mats Blomqvist; Alexander M. Grishin; Prof. Bruce Wessels; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Functional materials; ferroelectrics; sodium potassium niobates; thin films; rf-magnetron sputtering; waveguiding; refractive index; prism-coupling; electro-optic effects; dielectric tunability; Funktionella material; Functional materials; Funktionella material;

    Sammanfattning : Ferroelectric oxides are a group of advanced electronic materials with a wide variety of properties useful in applications such as memory devices, resonators and filters, infrared sensors, microelectromechanical systems, and optical waveguides and modulators.Among the oxide perovskite-structured ferroelectric thin film materials, sodium potassium niobate or Na0. LÄS MER

  4. 3. Computer Simulations of Photonic Semiconductor Devices

    Författare :Björn Jonsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; device dynamics; quantum size effects; Schrödinger equation; transfer matrix method; waveguiding properties;

    Sammanfattning : This thesis aims to provide insight into three important aspects of modern computer simulation techniques related to advanced photonic semiconductor devices. These aspects are quantum size effects, waveguiding properties, and device dynamics. LÄS MER

  5. 4. High Frequency Microwave and Antenna Devices based on Transformation Optics and Glide-Symmetric Metasurfaces

    Författare :Mahsa Ebrahimpouri; Oscar Quevedo-Teruel; Nader Engheta; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Glide Symmetry; Transformation Optics; Lens Antennas; High Frequency; Microwave Devices; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : The new generation of wireless communication networks intends to support data rate of Gbit/s. One solution to make it possible is to move upwards in frequency range to employ the unused spectrum in mm-wave frequencies. LÄS MER

  7. 5. Wafer-level processing of ultralow-loss Si3N4

    Författare :Marcello Girardi; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; waveguide; photonic integrated circuit; multilayer integration; ultralow loss; microcombs i; silicon nitride;

    Sammanfattning : Photonic integrated circuits (PICs) are devices fabricated on a planar wafer that allow light generation, processing, and detection. Photonic integration brings important advantages for scaling up the complexity and functionality of photonic systems and facilitates their mass deployment in areas where large volumes and compact solutions are needed, e. LÄS MER