Direct surface cyclotron resonance terahertz emission from a quantum cascade structure

Details Direct surface cyclotron resonance terahertz emission from a quantum cascade structure Direct surface cyclotron resonance terahertz emission from a quantum cascade structure

2012-03-23

arxiv.org/abs/1203.5195v1

Applied Physics Letters 100 (2012) 102103

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

A strong magnetic field applied along the growth direction of a semiconductor quantum well gives rise to a spectrum of discrete energy states, the Landau levels. By combining quantum engineering of a quantum cascade structure with a static magnetic field, we can selectively inject electrons into the excited Landau level of a quantum well and realize a tunable surface emitting device based on cyclotron emission. By applying the appropriate magnetic field between 0 and 12 T, we demonstrate emission from a single device over a wide range of frequencies (1-2 THz and 3-5 THz).

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