Millimeter and submillimeter oscillators using resonant tunneling diodes with stacked-layer slot antennas

We proposed a resonant tunneling diode (RTD) oscillator with a stacked-layer slot antenna toward the terahertz range, and demonstrated 254 GHz oscillation with GaInAs/AlInAs RTD. Theoretical analysis for oscillation frequency of the fabricated device was in reasonable agreement with the measurement. Higher oscillation frequency is expected by reducing the slot length.