Terahertz (THz), Mid Infrared (MIR) and Near Infrared (NIR) Technologies for Protection of Critical Infrastructures Against Explosives and CBRN

0548170 - FZÚ 2022 RIV NL eng M - Část monografie knihy
Shevchenko, Yuliia - Apostolakis, Apostolos - Pereira, Mauro Fernandes
Recent advances in superlattice frequency multipliers.
Terahertz (THz), Mid Infrared (MIR) and Near Infrared (NIR) Technologies for Protection of Critical Infrastructures Against Explosives and CBRN. Dordrecht: Springer, 2021 - (Pereira, M.; Apostolakis, A.), s. 101-116. ISBN 978-94-024-2081-4
Institucionální podpora: RVO:68378271
Klíčová slova: frequency multiplication * gigahertz * terahertz * superlattices * CBRN agents * harmonic generation * elastic scattering
Obor OECD: Optics (including laser optics and quantum optics)

Semiconductor superlattice multipliers have emerged as a nonlinear medium capable to generate radiation in a wide frequency range. This property facilitates the potential of sources suitable for sensing and spectroscopy applications. In this study, we further investigate the consequences on harmonic generation in a superlattice multiplier after excitation by an input signal oscillating at different frequencies. Here we provide a rigorous description of our theoretical model including a semiclassical Boltzmann approach to nonlinear miniband transport and non-equilibrium Greens functions calculations treating scattering processes under forward and reverse bias. To fully exploit the features of this radiation source, we focus on the effects of elastic scattering and systematic imperfections in the superlattice structure which lead to asymmetric current flow.
Trvalý link: http://hdl.handle.net/11104/0324281