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- W1676793905 abstract "This work focuses on surface plasmon quantum cascade lasers (QCL) as a local oscillators (LO) for heterodyne receivers operating above 2 THz. The far-field beam pattern of a 214 pm wide and 1500 / tm long 2.84 THz surface plasmon QCL is measured and found to be less divergent compared to metal-metal waveguide QCLs, which is preferable for coupling the radiation to a quasi-optical mixer. We successfully used this QCL to pump a NbN HEB mixer integrated with spiral antenna. At optimized LO power and bias voltage we measured double side band receiver noise temperatures of 1150 K and 1050 K at bath temperature of 4 K and 2 K respectively. To the best of our knowledge these represent the highest reported sensitivities at such a high frequency." @default.
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- W1676793905 date "2006-05-01" @default.
- W1676793905 modified "2023-09-24" @default.
- W1676793905 title "2.8 THz heterodyne receiver based on a surface plasmon quantum cascade laser and a hot electron bolometer mixer" @default.
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