Dynamic Silicon Nanophotonic Devices For On-Chip Optical Interconnects
Silicon nanophotonics is one of the most promising candidates to keep the steady increase of computational power we have been used to for the last decades. Its most appealing feature is the amount of data it can deliver, an important factor as complex networks on chip are developed: while Microelectronics suffers from attenuation of the signal traveling through metallic wires as bandwidth is increased, in Photonics losses and bandwidth are not related. Joining our efforts with many of the interesting insights provided by researchers in this very active field of Silicon Nanophotonics, we present a few more dynamic components which are key for the development and maturing of this technology. The first device we study is a hitless switch, which is formed by two coupled microring resonators which transfer function can be changed from a bandpass filter to a allpass filter. The second object of our study is a thermooptical coupled resonator filter which can be tuned across many nanometers while keeping its transfer function unchanged. Third we present a coupled cavity filter which has its Free Spectral Range doubled by using Mach-Zehnder Interferometer couplers, and we also demonstrate non-blocking tuning of such a filter. The last device we present is an electrically-driven optical-isolator, which provides an optical isolator without using magnetic materials, being therefore CMOS-compatible. All devices are studied theoretically, designed, fabricated and tested, with results corroborating the theory presented.
Silicon; Photonics; Dynamic Devices
Van Dover, Robert B.; Pollock, Clifford Raymond
Ph. D., Electrical Engineering
Doctor of Philosophy
dissertation or thesis