Design of Subwavelength CMOS Compatible Plasmonic Photodetector for Nano-Electronic-Photonic Integrated Circuits

作者：Gu Mingxia^*; Bai Ping; Chu Hong Son; Li Er Ping

来源：IEEE Photonics Technology Letters, 2012, 24(6): 515-517.

DOI：10.1109/LPT.2011.2182639

• Fabry-Perot resonator
• nanoantenna
• nano-electronic-photonic integrated circuits
• photodetector

We propose a technique to design a nanoscaled Ge photodetector that integrates with a subwavelength plasmonic waveguide. The photodetector is designed to effectively receive the electromagnetic waves from the waveguide via a resonant antenna, and to enhance the power absorption by Ge via a Fabry-Perot resonator. Simulation results show that 25.9% of the optical power from the waveguide can be absorbed by the photodetector with an active volume of 0.0032 mu m(3), and a responsivity of 0.049 A/W for a wavelength of 1550 nm and 3-dB bandwidth of 0.27 THz. The proposed photodetector with Si-CMOS compatible materials and ultra-compact dimensions can be applied to future chip-scale nano-electronic-photonic integrated circuits.

• 出版日期2012-3-15