Sökning: "bolometric mixer"

Hittade 3 avhandlingar innehållade orden bolometric mixer.

  1. 1. NbN Hot Electron Bolometric Mixers for a Quasi--Optical THz Receiver

    Författare :Matthias Kroug; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bolometric mixer; superconducting NbN; heterodyne detection; hot electron effect; quasi-optical;

    Sammanfattning : Experimental work on the development of a quasi-optical heterodyne receiver for the THz frequency range is reported. The mixing device is a superconducting hot electron bolometer (HEB) made from ultrathin, d = 3 - 5 nm, niobium nitride (NbN) films. LÄS MER

  3. 2. Picosecond Infrared Detection and Optical Mixing in YBa2Cu3O7-δ Thin Films

    Författare :Mikael Lindgren; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Studies of infrared photoresponse in high Tc superconducting YBa2Cu3O7-.delta. (YBCO) thin films are presented in this dissertation. LÄS MER

  4. 3. Ultra-thin Niobium Nitride Films for Hot Electron Bolometer and THz Applications

    Författare :Sascha Krause; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; HEB; ultra-thin NbN;

    Sammanfattning : The part of the electromagnetic spectrum between microwaves and infrared, also known as the terahertz band, is of particular interest for radio astronomy. The radiation intensity of the cold universe peaks at this frequency band, thus defining the demand on sensitive low-noise instruments in this particular frequency range. LÄS MER