Coherent Terahertz Radiation Generation Assisted by Low-Temperature Optical Phonon Emission: Achievements and Perspectives

P. Shiktorov a, E. Starikov a, V. Gružinskis a, L. Varani b and L. Reggiani c a Semiconductor Physics Institute, Goštauto 11, LT-01108, Vilnius, Lithuania b Institut d''Electronique du Sud (CNRS UMR 5214), UniversitéMontpellier 2, Pl. Eugène Bataillon, 34095 Montpellier Cedex 5, France c Dipartimento di Ingegneria dell'Innovazione, Universitàdel Salento and CNISM, Via Arnesano s/n, I-73100 Lecce, Italy

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Received: 26 08 2007;

The conditions for THz radiation generation caused by electron transite time resonance in momentum and real spaces under low-temperature optical-phonon emission are analyzed. It is shown that such a phenomenon provides a unique possibility to realize the sub-THz and THz radiation generation at the border of the electrooptical and electronic techniques by using both the approaches: (i) amplification of transverse electromagnetic waves in 3D bulk materials and 2D quantum wells, and (ii) longitudinal current instabilities in submicron and overmicron n+nn+ diodes.

DOI: 10.12693/APhysPolA.113.795 PACS numbers: 72.20.Ht, 72.30.+q, 73.63.Hs