Presentation Information
[9a-N204-8]Power Combination of Resonant Tunneling Diodes Using Terahertz Photonic-Crystal Y-branch Circuit
〇(P)Ngo Hoai Nguyen1, Yuta Inose1, Yuki Morita1, Yosuke Nishida2, Yoshiharu Yamada3, Hidemasa Yamane3, Shuichi Murakami3, Masayuki Fujita1 (1.The Univ. of Osaka, 2.ROHM, 3.ORIST)
Keywords:
resonant tunneling diode,photonic crystal,terahertz
In this paper, we demonstrate power combining from two in-plane RTD chips using a photonic-crystal Y-branch waveguide based on a silicon photonic-crystal slab structure. Separately, the two RTDs in the Y-branch waveguide exhibited oscillation frequencies of 356.0 GHz and 356.9 GHz, with measured powers of –32.0 dBm and –35.3 dBm, respectively. When operated simultaneously, they exhibited an identical oscillation frequency at 357.5 GHz with an output power of –27.4 dBm. This power increase suggests that the RTDs were mutually injection-locked, with phase matching between them leading to constructive interference. The proposed all-silicon Y-branch waveguide demonstrates the feasibility of power combining from individual RTD oscillators. Further power enhancement can be made by using a larger number of better-matched RTDs and increasing the transmittance of the waveguide system.