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The imaging and sensing technology operating in the THz region of the electromagnetic spectrum has a number of applications, with demonstrator products already available on the market for oncology imaging, production monitoring, and non-destructive test [1]. However, the THz sources now at hand are still bulky and too expensive for expanding this technology to other proposed applications, which also include, among other, THz bandwidth photonics and security imaging. A higher level of integration with control electronics, a lower production cost, and a broader wavelength range of emission towards the far-infrared, are all desirable features to expand the fields of application of THz radiation. N-type Ge/SiGe quantum cascade structures grown on top of a Si(001) substrate are particularly promising for realizing a Si based THz source [2]. The low effective mass and long non-radiative relaxation times due to the …
International Society for Optics and Photonics
Publication date: 
9 Sep 2019

Luca Persichetti, Chiara Ciano, Michele Virgilio, Michele Montanari, Luciana Di Gaspare, Michele Ortolani, Leonetta Baldassarre, Marvin Zoellner, Oliver Skibitzki, David Stark, Giacomo Scalari, Jérôme Faist, Kirsty Rew, Douglas J Paul, Samik Mukherjee, Oussama Moutanabbir, Mario Scuderi, Giuseppe Nicotra, Thomas Grange, Stefan Birner, Giovanni Capellini, Monica De Seta

Biblio References: 
Volume: 11084 Pages: 110840B
Physical Chemistry of Semiconductor Materials and Interfaces XVIII