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We are studying resonant-tunneling diodes (RTDs) with strong back injection of electrons from collector into quantum well. Such RTDs exhibit large negative differential conductance and they operate up to 1.46 THz in oscillators.
Optimizing high-power ultrashort pulse amplifier using double-clad Yb-doped fiber, maximum output power of >3 W with a pulse width of 110 fs without pedestal component is obtained. Using this pulse, high-power high-efficiency broadband THz pulse generation is expected.
Recent outstanding results achieved with the HIFI instrument on board the Herschel Space Telescope are driving a new generation of high-resolution coherent detectors in the terahertz range, not only for astrophysics but also for planetary science and Earth science missions. Schottky based receivers in the THz range and advanced receiver topologies such as compact arrays and side-band-separation require...
We fabricated a novel resonant-tunneling-diode terahertz oscillator with high-frequency modulation structure for high-capacity terahertz communication and measured the frequency response using vector network analyzer. A very high cut-off frequency of 30 GHz in intensity modulation was obtained by the device oscillating at 350 GHz with reduced MIM capacitor of 0.7 pF.
Optimizing high-power ultrashort pulse amplifier using double-clad Yb-doped fiber, maximum output power of >3 W with a pulse width of 110 fs without pedestal component is obtained. Using this pulse, high-power THz pulse generation is measured by a pyroelectric detector with a low sensitivity.
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