Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 40 for “"Photonic circuits"”.
-
Towards Direct Writing Of 3-d Photonic Circuits Using Ultrafast Lasers
The advent of ultrafast lasers has enabled micromachining schemes that cannot be achieved by other current techniques. Laser direct writing has emerged as one of the possible routes for fabrication of optical waveguides in transparent materials. In this thesis, the advantages and limitations of …
-
Integrated nonlinear photonic circuits for mediating and detecting photon-photon interactions
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
-
Design and fabrication of single-mode tunable lasers for regrowth-free monolithically integrated photonic circuits
… terminals, results in a large-scale need for the photonic components that are at the core of the optical communication network. In order to satisfy the demand, photonics industries need to increase their production capabilities and adopt more efficient fabrication processes. Streamlining the …
-
Controlling Semiconductor Optical Amplifiers for Robust Integrated Photonic Signal Processing
How can we evaluate and design integrated photonic circuit performance systematically? Can active photonic circuits be controlled for optimized performance? This work uses control theory to analyze, design, and optimize photonic integrated circuits based on versatile semiconductor optical …
-
Shaping light-matter interactions for free-electron radiation and photonic computing
Nanophotonics has become over the past decades a paramount technology, enabling, among other things, the design of novel light sources, detectors, and devices controlling the polarization, spectral, and angular distribution of light. A landmark of nanophotonics is the design of nanostructured …
-
Ring Resonators Intergrating With Dichoric Materials And In Spin-valley Controlled Photonic Topological System
<p>Photonic technology plays an important role in the development of diverse applications, ranging from optical telecommunications to sensing and imaging. The utilization of photonic circuits emerges as a promising platform for the establishment of advanced communication systems characterized by …
-
On-chip single photon sources based on quantum dots in photonic crystal structures
… quantum information processing, readily scalable photonic circuits will be required. A major obstacle for this scalability is the monolithic integration of quantum light sources with the photonic circuit on a single chip. This dissertation presents the experimental demonstration of different …
-
Novel polarization-diversity devices on a silicon-on-insulator platform.
Silicon photonics built on a silicon-on-insulator (SOI) platform has received much attention in recent years due to its compatibility with complementary metal-oxide-semiconductor (CMOS) technology, which makes the mass production of photonics devices cost-effective. The intrinsic high-index …
-
Efficient out-of-plane microphotonic fiber-to-chip coupler designs
… and as a result the forthcoming reliance on photonic circuits for all-optical switching, routing and signal processing, efficient coupling of light between a nanophotonic waveguide and a fiber has become a critical and interesting issue to investigate. The objective of this thesis is to …
-
Si-based Germanium-Tin (GeSn) Emitters for Short-Wave Infrared Optoelectronics
… the high-density electronic packages. Integrated photonic circuits based on the highly developed Si complementary-metal-oxide-semiconductor (CMOS) infrastructure was proposed as a viable solution; however, Si-based emitters are the most challenging component for the monolithic integrated photonic …
-
FABRICATION METHODOLOGIES FOR INTEGRATED PHOTONIC DEVICES IN LITHIUM NIOBATE
… the most commonly used materials in the active photonic devices. However, the fabrication of advanced LiNbO3 devices like suspended membrane is still quit challenging, limiting the development of integrated optics. The overall aim of this study was to explore the fabrication methods and attempt …
-
A Universal Heterostructure for Photonic Integrated Circuit Applications
… for the fabrication of integrated waveguide photonic circuits are investigated using an optical 2 x 2 crossbar switch as a case study. The optical characteristics of slab waveguides are investigated as candidate "universal" structures. Different core profiles, core sizes, and cladding …
-
Modeling Compact Non-Volatile Photonic Switching Based on Optical Phase Change Material and Graphene Heater
On-chip photonic switches are the building blocks for programable integrated circuits (PICs) and the integration of phase change materials (PCMs) enables promising designs which are compact, non-volatile, and efficient. However, conventional PCMs such as Ge₂Sb₂Te₅ (GST) introduce significant …
-
Process and design techniques for low loss integrated silicon photonics
… electronic interconnect bottleneck is to utilize photonic interconnects. Photonic interconnects (waveguides) offer high data bandwidths with low signal attenuation and virtually zero heat dissipation. Strategic replacement of RC speed-limited electronic interconnects with photonic interconnects is …
-
Control of Excitons and Quantum Emitters in Two-Dimensional Materials
… heterostructures and integration into various photonic circuits. Recently, single-photon emitters have been identified in an insulating hexagonal boron nitride (hBN) and semiconducting transition metal dichalcogenides (TMDs). In spite of the unique characteristics of these emitters, they suffer …
-
Large-scale programmable silicon photonics for quantum and classical machine learning
Photonic technologies provide many unique physical advantages including ultra-high bandwidths, energy-efficient operations, and low coupling to environmental noise. Furthermore, recent advances in foundry-based manufacturing platforms have enabled the emerging field of integrated systems photonics. …
-
Design considerations for Ge-on-Si waveguide photodetector
In integrated photonic circuits photodetector is one of key components, modern applications require that photodetector has a high 3 dB bandwidth. The ultimate limit for the response time for conventional photodetectors (like vertically illuminated photodiode, Schotky photodiode, MSM photodetector …
-
Generation, manipulation and detection of NIR and MIR entangled photon pairs
… was to bring the quantum world into integrated photonics by using the silicon platform and, therefore, permitting the integration of quantum photonics with electronics. The vision was to have low cost and mass manufacturable integrated quantum photonic circuits for a variety of different …
-
Membrane technology for the fabrication of three-dimensional photonic crystals
Three-dimensional photonic crystals hold tremendous promise toward the realization of truly integrated photonic circuits on a single substrate. Nanofabrication techniques currently limit the ability to create the multilayer structure of dielectric materials. Past investigators have approached the …
-
Control of Optical Processes in Diamond using Plasmonic Nanogap Cavities
… for in-situ frequency conversion to outcouple to photonic circuits and reconfigurable properties by incorporating VO2 thin films. </p>
Page 1 of 2