Non-linear dynamics of semiconductor superlattices

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Coupling functions:universal insights into dynamical interaction mechanisms (2017, background): “…Shukla and Eliasson, 2011), solid state physics (Farid, 1997; Higuchi and Yasuhara, 2003; Zhang, 2013), interactions in semiconductor superlattices (Bonilla and Grahn, 2005), Josephson junction interactions (Golubov et al., 2004), laser diagnostics (Stepowski, 1992), interactions in nuclear…”
A 1.8-THz quantum cascade laser operating significantly above the temperature of ℏω/kB (2011, background): “However, the original proposal required the device to be inherently operated in a negative-differential resistance (NDR) bias regime, which is electrically unstable owing to the formation of high-field domains in the superlattic”
Recent Progress in Terahertz Quantum Cascade Lasers (2011, unknown): “ities corresponding to a negative differential resistance (NDR) could be avoided [44], an essential feature of the injector region in the QCLs [45].”