Nonlinear Optical Signal Processing And Tunable Optical Delays In Silicon On Insulator Waveguides

Both approaches were fabricated and characterized and demonstrate relatively large delays (up to 65 ps) in discrete steps (from 15 ps to 32 ps) over wide bandwidths (from 35 nm to 70 nm), however they require further optimization. All-optical signal processing and optical devices presented in this thesis provide building blocks and indicate future steps that can lead toward fully integrated OTDM demultiplexer in SOI." --

In this book, nonlinear silicon-organic hybrid waveguides and quantum dot semiconductor optical amplifiers are investigated. Advantageous applications are identified, and corresponding proof-of-principle experiments are performed. Highly nonlinear silicon-organic hybrid waveguides show potential for all-optical signal processing based on fourwave mixing and cross-phase modulation. Quantum dot semiconductor optical amplifiers operate as linear amplifiers with a very large dynamic range.

The behavior of light in small scale optics or nano/micro optical devices has shown promising results, which can be used for basic and applied research, especially in nanoelectronics. Small Scale Optics presents the use of optical nonlinear behaviors for spins, antennae, and whispering gallery modes within micro/nano devices and circuits, which can

This book details how to design and fabricate microresonators. It covers the latest in microresonator research and discusses them in photonic crystals, microsphere circuits and sensors. It includes application-oriented examples.

This book is a detailed compendium of these major advancements focusing exclusively on the emerging broadband wireless communication technologies which support broadband wireless data rate transmissions.

This thesis is dedicated to the investigation of optical signal processing in integrated photonic platforms. In particular, I developed novel devices and techniques based on silcon-on-sapphire (SOS), silicon-on-insulator (SOI) and silicon nitride (SiN) waveguides, as well as plasmonic metasurfaces and dielectric gratings based nanophotonic wavefront-engineered planar devices. Using these devices, several applications of telecommunication wavelengths and mid-IR wavelengths are presented. The first part of the thesis investigates novel devices based on SOS and SiN technology and optical signal processing by using these devices. The fabrication techniques of both SOS and SiN waveguide are introduced with main focusing on the deposition of the guiding material (Si and SiN). Fabrication of SiN channel waveguides was pursued in the context of providing a guiding channel for optical leaky wave antenna (OLWA). A new technique of fabricating SiN waveguide with conventional optical lithography was also discussed. The fabricated SiN waveguides have a propagation loss of 0.8dB/cm and nonlinear refractive index of n2=1.39 710−19m2/W. Then, a gas sensor based on mid-IR evanescent absorption in SOS waveguide was proposed. Strip, rib and slot waveguides were designed for optimized interaction with the gas. A case study of CO2 detection based on its mid-IR absorption peak at ~4.23[mu]m can achieve a resolution of 2ppm. To further improve the sensing performance, a new scheme of indirect detection of mid-IR signal was proposed. One of the main challenges in the field involves the detection of mid-IR signal at room temperature. I developed an indirect detection system. Mid-IR signal was first converted to the near-IR wavelength through wavelength conversion in a SOS waveguide and then indirectly detected with high-performance telecommunication detectors. The signal-to-noise ratio (SNR) could be improved by 40dB compared to direct detection using mid-IR detectors. The SNR improvement is highly dependent on the conversion efficiency and bandwidth of the wavelength conversion process. To enhance the efficiency and bandwidth, quasi-phase-matching in SOS and SOI waveguides was investigated. By alternating the waveguide sections with opposite dispersion periodically, efficiency can be enhanced by 50dB and bandwidth can be broadened by 2x.The second part of the thesis focused on the design and fabrication of two types of wavefront-engineered planar devices. The first type is a blazed grating based on phase-gradient gap-plasmon metasurface. 75.6% power efficiency with ~0.4°/10nm spatial dispersion has been measured. The fabricated device has been tested in a dispersive imaging system, achieving

This book explains for readers how 3D chip stacks promise to increase the level of on-chip integration, and to design new heterogeneous semiconductor devices that combine chips of different integration technologies (incl. sensors) in a single package of the smallest possible size. The authors focus on heterogeneous 3D integration, addressing some of the most important challenges in this emerging technology, including contactless, optics-based, and carbon-nanotube-based 3D integration, as well as signal-integrity and thermal management issues in copper-based 3D integration. Coverage also includes the 3D heterogeneous integration of power sources, photonic devices, and non-volatile memories based on new materials systems.