Rectified diode response of a multimode quantum cascade laser integrated terahertz transceiver

We characterized the DC transport response of a diode embedded in a THz quantum cascade laser as the laser current was changed. The overall response is described by parallel contributions from the rectification of the laser field due to the non-linearity of the diode I-V and from thermally activated...

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Bibliographic Details
Published in:Optics express 2013-02, Vol.21 (4), p.3996-4004
Main Authors: Dyer, Gregory C, Norquist, Christopher D, Cich, Michael J, Grine, Albert D, Fuller, Charles T, Reno, John L, Wanke, Michael C
Format: Article
Language:English
Subjects:
Equipment Design
Equipment Failure Analysis
Lasers, Semiconductor
Systems Integration
Telecommunications - instrumentation
Terahertz Radiation
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Summary:We characterized the DC transport response of a diode embedded in a THz quantum cascade laser as the laser current was changed. The overall response is described by parallel contributions from the rectification of the laser field due to the non-linearity of the diode I-V and from thermally activated transport. Sudden jumps in the diode response when the laser changes from single mode to multi-mode operation, with no corresponding jumps in output power, suggest that the coupling between the diode and laser field depends on the spatial distribution of internal fields. The results demonstrate conclusively that the internal laser field couples directly to the integrated diode.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.003996