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PhD Final Exam – Qian Gao

Plasmonic Nano-Antenna and Modulator for On-chip Optical Interconnects

With the rapid growth of worldwide internet traffic in data centers and clouds, silicon photonics has been utilized to provide enormous data bandwidth and outstanding energy efficiency over electronics. However, there are still many challenges for integrating photonic devices on an electronic chip, such as power consumption and size mismatch. We are mainly focused on solving two of the challenges. One of them is the efficient coupling of light into the sub-micron photonic devices. Four types of nano-antennas−dipole antenna, Yagi-Uda antenna, antenna array, and bow-tie antenna−are designed to exhibit the capability of achieving high coupling efficiency. The other is about building Electro-Optic Modulators (EOMs) with an ultra-compact size, low power consumption and high bandwidth. Two types of EOMs are reported, one being integrated with plasmonic slot waveguide and the other being built on a standard silicon-on-insulator (SOI) waveguide. The t! wo modulators, which are designed and experimentally developed here, uniquely utilize the transparent conducting oxides (TCOs) whose Epsilon-Near-Zero (ENZ) effect has made plasmonic material combine with electro-optic modulation. Therefore, the modulators are capable of leading brand new next-generation photonic devices.

Major Advisor: Alan Wang
Committee: Arun Natarajan
Committee: Matthew Johnston
Committee: John F. Conley
GCR: Zhengxing Feng

Wednesday, March 13 at 1:00pm to 3:00pm

Kelley Engineering Center, 1005
110 SW Park Terrace, Corvallis, OR 97331

Event Type

Lecture or Presentation

Event Topic


College of Engineering, Electrical Engineering and Computer Science
Contact Name

Calvin Hughes

Contact Email

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