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arXiv · 1409.7704

Multiphoton processes at cyclotron resonance subharmonics in a 2D electron system under DC and microwave excitation

S. Chakraborty·A. T. Hatke·L. W. Engel·J. D. Watson·M. J. Manfra
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Abstract

We investigate a two-dimensional electron system (2DES) under microwave illumination at cyclotron resonance subharmonics. The 2DES carries sufficient direct current, $I$, that the differential resistivity oscillates as $I$ is swept. At magnetic fields sufficient to resolve individual Landau levels, we find the number of oscillations within an $I$ range systematically changes with increasing microwave power. Microwave absorption and emission of $N$ photons, where $N$ is controlled by the microwave power, describes our observations in the framework of the displacement mechanism of impurity scattering between Hall-field tilted Landau levels.

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S. Chakraborty, A. T. Hatke, L. W. Engel, J. D. Watson, M. J. Manfra. 2014-09-26. Multiphoton processes at cyclotron resonance subharmonics in a 2D electron system under DC and microwave excitation. https://doi.org/10.1103/physrevb.90.195437

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