Terahertz Bloch oscillator with suppressed electric domains: Effect of elastic scattering

Details Terahertz Bloch oscillator with suppressed electric domains: Effect of elastic scattering Terahertz Bloch oscillator with suppressed electric domains: Effect of elastic scattering

2005-11-07

arxiv.org/abs/cond-mat/0511145v1

Int. J. Mod. Phys. B 23 (2009) 4459

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Submitted to proceedings of the summer school-conference of AQDJJ programme of ESF, Kiten, Bulgaria, 9-24 June 2005

Scientific paper

10.1142/S0217979209063596

We theoretically consider the amplification of THz radiation in a superlattice Bloch oscillator. The main dilemma in the realization of THz Bloch oscillator is finding operational conditions which allow simultaneously to achieve gain at THz frequencies and to avoid destructive space-charge instabilities. A possible solution to this dilemma is the extended Limited Space-Charge Accumulation scheme of Kroemer (H. Kroemer, cond-mat/0009311). Within the semiclassical miniband transport approach we extend its range of applicability by considering a difference in the relaxation times for electron velocity and electron energy. The kinetics of electrons and fields establishing a stationary signal in the oscillator is also discussed.

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