Search for dissertations about: "QWIP"

Found 3 swedish dissertations containing the word QWIP.

  2. 1. Light manipulation in micro and nano photonic materials and structures

    Author : Zhihui Chen; Ying Fu; E. L. Ivchenko; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Photonic crystal; quantum dot; light-matter interaction;

    Abstract : Light manipulation is an important method to enhance the light-matter interactions in micro and nano photonic materials and structures by generating usefulelectric field components and increasing time and pathways of light propagationthrough the micro and nano materials and structures. For example, quantum wellinfrared photodetector (QWIP) cannot absorb normal incident radiation so thatthe generation of an electric field component which is parallel to the original incident direction is a necessity for the function of QWIP. READ MORE

  4. 2. High-speed optical modulators based on intersubband transitions

    Author : Petter Holmström; KTH; []
    Keywords : ;

    Abstract : Optical modulators are essential components in high speedoptical communication. They are employed to circumvent theinherent speed limitations of direct modulated semiconductorlasers, and may also extend the transmission distance onoptical fibers by providing optical pulses with lowerchirp. READ MORE

  5. 3. Compound semiconductor materials and processing technologies for photonic devices and photonics integration

    Author : Carl Reuterskiöld Hedlund; Mattias Hammar; Mikael Östling; Sebastian Lourdudoss; Harri Lipsanen; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Informations- och kommunikationsteknik; Information and Communication Technology;

    Abstract : The advancement of semiconductor optoelectronics relies extensively on materials and processing technologies of ever-increasing sophistication, such as nanometer-range lithography, epitaxial growth methods with monatomic layer control, and anisotropic etching procedures that allows for the precise sculpturing of device features even in the limit of extreme aspect ratios. However, upcoming application needs puts requirements on optimized designs or device performances, e. READ MORE