[10p-Z24-1~16] 3.9 Terahertz technologies

▲ [10p-Z24-16] Structure optimization of RTD THz oscillator integrated with rectangular-cavity resonator for high output power

〇(M2)Feifan Han¹, Hidenari Fujikata¹, Kazunori Kobayashi¹, Hiroki Tanaka¹, Safumi Suzuki¹, Masahiro Asada¹ (1.Tokyo Tech)

Keywords:Resonant Tunneling Diode, Terahertz, High Output Power

Oscillators using resonant tunneling diodes (RTDs) are major candidates for THz wave sources, because of their operation at room temperature and compactness. For higher output power, novel RTD THz oscillators with cavity resonators and bow-tie antennas were proposed, and simulated output power of ~2 mW was shown at around 1 THz by the impedance matching. The oscillator is composed of a line-shaped RTD mesa, a rectangular cavity resonator, and a bow-tie antenna. We analyzed the admittance of cavity resonator and antenna using 3D electromagnetic simulation including the conduction loss, and established an equivalent circuit model for this structure. In this work, we theoretically show that the output power further increases with cavity length by keeping the impedance matching. The output power is maximized at a given cavity length by an optimum MIM capacitor, and the maximum output power increases with increasing cavity length. A high output power of ~5 mW is possible at the cavity length of ~90um.