Terahertz difference-frequency-generation quantum cascade lasers on silicon with wire grid current injectors
Optics Express, 2022•opg.optica.org
We propose the concept and experimentally verify the operation of terahertz quantum
cascade laser sources based on intra-cavity Cherenkov difference-frequency generation on
a silicon substrate with the current injection layer configured as a metal wire grid. Such a
current injector configuration enables high transmission of TM-polarized terahertz radiation
into the silicon substrate while simultaneously providing a low-resistivity metal contact for
current injection.
cascade laser sources based on intra-cavity Cherenkov difference-frequency generation on
a silicon substrate with the current injection layer configured as a metal wire grid. Such a
current injector configuration enables high transmission of TM-polarized terahertz radiation
into the silicon substrate while simultaneously providing a low-resistivity metal contact for
current injection.
We propose the concept and experimentally verify the operation of terahertz quantum cascade laser sources based on intra-cavity Cherenkov difference-frequency generation on a silicon substrate with the current injection layer configured as a metal wire grid. Such a current injector configuration enables high transmission of TM-polarized terahertz radiation into the silicon substrate while simultaneously providing a low-resistivity metal contact for current injection.
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