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- W2020792449 abstract "We exploit the modal confinement properties of metal-metal ridge waveguides to investigate the effect of reducing the thickness of the active laser cores in both terahertz and mid-infrared quantum cascade lasers. Devices with active regions over 55 times thinner than the free-space emission wavelength are demonstrated. They show only a modest increase in threshold current density compared with conventional-thickness devices. The limited increase in threshold is possibly due to a parasitic current channel in addition to the radiative current channel. These structures could be useful for the development of ultra-low volume lasers." @default.
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- W2020792449 date "2011-03-07" @default.
- W2020792449 modified "2023-09-25" @default.
- W2020792449 title "Vertical subwavelength mode confinement in terahertz and mid-infrared quantum cascade lasers" @default.
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- W2020792449 doi "https://doi.org/10.1063/1.3560980" @default.
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