Provider: Ingenta Connect Database: Ingenta Connect Content: application/x-research-info-systems TY - ABST AU - Buot, F. A. TI - On the Theory of Novel Solid-State Terahertz Sources: Renormalization and Bloch Equations JO - Journal of Computational and Theoretical Nanoscience PY - 2006-10-01T00:00:00/// VL - 3 IS - 5 SP - 712 EP - 726 KW - SEMICONDUCTOR BLOCH EQUATIONS KW - ZENER TUNNELING KW - TUNNELING-LEVEL BLOCH EQUATIONS KW - QUANTUM TRANSPORT KW - MICHAELIS-MENTEN RATE EQUATIONS KW - CATALYSIS KW - RESONANT TUNNELING DEVICES KW - NANOELECTRONICS N2 - The theoretical foundation of the author's chemical approach to novel solid-state THz sources is given a more fundamental justification. The chemical approach is based on a phenomenological Michaelis-Menten type of kinetic rate equations describing the limit-cycle autonomous-current oscillations of resonant tunneling diodes (RTDs). A more fundamental justification presented here is based on a renormalization of the multi-band quantum transport equations in the electron–hole representation. To shed more light on the parameters of the theory, this renormalization approach is further developed by considering the selfconsistent quantum-dynamical interaction between the quantized energy level of the emitter and discrete energy level of the quantum well (QW) as a tunnel-coupled two site-states quantum systems. This view is used to formulate the Bloch equations with dielectric relaxation rate to account for the selfconsistent-potential response to nonstationary redistribution of charges between the emitter and the quantum well causing a temporal mismatch between their energy levels. The QW density also serves as a catalyst for tunneling between emitter and QW. These two counteracting physical influences result in autonomous current oscillations around the resonance condition. UR - M3 - doi:10.1166/jctn.2006.3055 UR - ER -