| Zugriffsnummer | 46069 |
| Dokumenttyp | Buchartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Photoconductive THz sources driven at 1550 nm |
| Autor(in); Institution |
Brown, E.R.; Department of Physics and Electrical Engineering, Wright State University, Dayton, OH, USA
Globisch, B.; Department of Physics, Technische Universität Berlin, Berlin, GERMANY; Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute, Berlin, GERMANY
Carpintero delBarrio, G.; Departamento Teoría de la Señal y Comunicaciones, Universidad Carlos III de Madrid, Madrid, SPAIN
Rivera, A.; Departamento Teoría de la Señal y Comunicaciones, Universidad Carlos III de Madrid, Madrid, SPAIN
Steiger, Andreas; 7.3, Detektorradiometrie und Strahlungsthermometrie, PTB-Berlin
|
| Quelle/Jahr | Fundamentals of Terahertz Devices and Applications: 1 (2021) |
| Herausgeber(in) |
Pavlidis, Dimitris; John Wiley & Sons, Ltd.
|
| ISBN | 978-1-119-46071-8 |
| URL | |
| Verlag | Hoboken, NJ: Wiley |
| Zusammenfassung | The THz region is at minimum the decade-wide band of the electromagnetic spectrum between 300 GHz and 3.0 THz1, with the millimeter-wave region below and the far-infrared region above. The first experiments were conducted around 1900 by H. Rubens, M. Czerny, and B.W. Snow. At that time, the so-called residual-radiation method was applied in order to extract radiation with a wavelength between 15 and 100 μm (20–3 THz) from the spectrum of a blackbody. However, it took another 80 or so years until the development of the first femtosecond pulse laser in the 1970s allowed for the generation and detection of broadband THz radiation. The reason for the long time delay is because the generation and detection of THz radiation are relatively difficult. Thus, the first successful broadband THz radiation relied on an optoelectronic technique: a femtosecond laser source being applied to induce a transient current in a light-sensitive, biased semiconductor having short photocarrier relaxation time. Soon thereafter, THz optoelectronic generation of continuouswave (CW) radiation was demonstrated by the mixing of two frequency-offset lasers on a similar semiconductor. These so-called photoconductive (PC) sources have served as the workhorses for the development of coherent terahertz systems in the following decades. |
| Themenbereich der Metrologie | Photometrie und Radiometrie |