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qcl:photon-assisted_transport_and_gain_clamping [2020/11/19 16:22]
qcl:photon-assisted_transport_and_gain_clamping [2020/11/20 14:14] (current)
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|+||=== Example: Mid-infrared QCL ===|
|+||The following animated gifs show the electron density, current density and output as the voltage is swept. Above the threshold bias (around 300 meV), the clamping of the gain to the cavity losses results a rapid increase in the internal electric field in the cavity. The photon-assisted transport results in a discontinuity in the slope of the current-voltage characteristics at the threshold bias/current: above threshold, the current increases much faster as stimulated emission reduces the upper laser level lifetime.|