Losses from long-living photoelectrons in terahertz-generating continuous-wave photomixers

Michael, E.A.; Mikulics, M.

doi:10.1063/1.4711777

Journal Article

PreJuSER-22692

Losses from long-living photoelectrons in terahertz-generating continuous-wave photomixers

Michael, E. A. ; Mikulics, M.FZJ*

2012
American Institute of Physics Melville, NY

Applied physics letters 100, 191112 (2012) [10.1063/1.4711777]

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Please use a persistent id in citations: http://hdl.handle.net/2128/7573 doi:10.1063/1.4711777

Abstract: The extraction of continuous-wave terahertz (THz) power from photonic mixers is known to be hampered by input power limitations, low conversion efficiencies, and saturation effects. Using vertically illuminated low-temperature-grown GaAs travelling-wave mixers with a coplanar stripline geometry, a mechanism of illumination-dependent reabsorption of the THz-power generated by the mixer was isolated. We find evidence that it is related to a substantial density of long-living photoelectrons (several nanoseconds). The proposed mechanism is expected to impact the performance of photonic terahertz mixers at high input powers, also of those based on transit-time-dominated semiconductor structures. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4711777]

Keyword(s): J

Classification:

Physics, Applied

Note: E.A.M. acknowledges support by CONICYT Chile (Grants Fondecyt No. 1090306 and ALMA No. 31080020) and by Deutsche Forschungsgemeinschaft (Grant No. SFB 494, through J. Stutzki and R. Schieder of I. Physikalisches Institut, Universitat zu Koln, Germany), and from I. Camara Mayorga and R. Gusten of Max Planck Institut fur Radioastronomie, Bonn, Germany.

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