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.
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Showing 1 to 17 of 17 for “"Microdisk"”.
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Stimulated Brillouin scattering in an on-chip microdisk resonator
… thesis, we propose a released silicon nitride microdisk resonator coupled by means of waveguide and gratings to realize on-chip SBS. Our COMSOL simulations show that the phase matching condition is possible between the first- and second-order transverse optical modes in the wavelength range of …
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A Vertically Loaded Diamond Microdisk Resonator (VLDMoRt) towards a Scalable Quantum Networks
… a cavity design of vertically-loaded diamond microdisk resonator (VLDMoRt). It couples to a nitrogen-vacancy (NV) center in diamond for efficient collection of fluorescence emission into low numerical aperture (NA) free-space modes. The VLDMoRt achieves a Purcell enhancement of 172 with 39% of …
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Design, fabrication, and characterization of lithium niobate whispering-gallery-mode microdisk and microring resonators and grating couplers
… of LiNbO3 whispering-gallery-mode microring and microdisk resonators, a single-ring filter, and grating couplers. The theory, simulation, fabrication, and experimental results of these devices are presented. Fabricated grating couplers with center wavelengths around 1560 nm are characterized and …
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Design, fabrication, and characterization of a lithium niobate optomechanical photodetector based on released whispering-gallery-mode microdisk resonators
Lithium Niobate (LiNbO3) is a piezoelectric material that also exhibits promising optical characteristics such as low optical loss and high electro-optic coefficient, making it an interesting choice for Radio Frequency (RF) micro-opto-electro-mechanical systems (MOEMS) and devices, electro-optical …
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Fiber-taper collected photoluminescence characterization of diamond microdisks
… lead to the construction of high quality diamond microdisk resonators, which show potential to reach enhancements with Purcell factor CNV ∼ 50. Here, a room-temperature experimental apparatus integrating free space and visible wavelength fiber-taper measurement capabilities is built to …
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Selective Oxidation of Aluminum-Bearing Iii-V Semiconductors: Properties and Applications to Small-Volume Quantum Well Heterostructure Lasers
… lattice that is comprised of $\sim$9-$\mu$m microdisk lasers that are arranged in a triangular (hexagonal close-packed) lattice arrangement. The disks are closely spaced (11-$\mu$m center-to-center spacing) such that they are strongly coupled. As a result of the coupling of the disks, the …
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Chip Scale Integrated Optical Sensing Systems with Digital Microfluidic Systems
… Therefore, as a second step, chip scale optical microdisk/ring sensors integrated with digital microfluidic systems were fabricated and measured. . The response of the microdisk and microring sensing systems to the change index of refraction, due to the glucose solutions in different …
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Automated wavelength recovery for silicon photonics
… high performance active silicon resonators. A microdisk modulator achieved open eye-diagrams at a data rate of 25Gb/s and error-free operation up to 20Gb/s. A thermo-optically tunable microdisk modulator with Low power modulation (1 If/bit) at a data rate of 13-Gb/s, a 5.8-dB extinction ratio, …
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Towards electrochemical diagnostics of biochemical free radical species in aqueous microliter volumes
… drop. The resulting three-electrode sensor with microdisk gold working electrode of radius 19 μm was characterized using ferrocenemethanol in aqueous buffer. Using cyclic voltammetry, the electrochemically active surface area was estimated by combining a recessed microdisk electrode model with …
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Multi-Microscopy Characterisation of III-Nitride Devices and Materials
… in unetched material on the underside of a microdisk using FIB/SEM sample preparation methods. The roughness and morphology of microdisk and nanobeam cavities was studied using FIB-tomography (FIBT), demonstrating how the dual-beam instrument may be used to access the 3D morphology of …
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Self-assembly of lead-halide-perovskite laser particles
… particles', has drawn attention. Semiconductor microdisk lasers fabricated by top-down lithography have shown potential for massive multiplexing of thousands to millions of samples. In the thesis, I investigated lead halide perovskites (LHP) as a novel material for scalable production of laser …
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Multi-layer, Low-crosstalk Integrated Optical Switches
… (MRR)-based 8×8 switch and an electro-optic microdisk switch are demonstrated, both leveraging the tri-layer platform to achieve >70 GHz bandwidth and sub-microsecond to nanosecond switching speeds. The thermo-optic device achieves crosstalk suppression of −33.2 to −50.8 dB and on-chip losses …
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Enhancing the performance of silicon photonic biosensors for clinical applications
… Specifically, TM mode microring resonators, microdisk resonators, thin waveguide resonators, and sub-wavelength grating microring resonators that provide an order of magnitude sensitivity improvement over today's commercially available ring resonators are presented. Furthermore, the use of …
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Electrochemical materials and microfabrication for sensor devices
… substrates, integrating this material into the microdisk array (MDA) platform to evaluate its potential as an electrochemical sensor and detecting analytes with catalytic affinities to copper. Fabrication involved preparing NPC electrodes using a sacrificial CuZn alloy technique, with the …
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Quantum control of optically active defects in the solid state
… defects (formed at the SiC/SiO2 interface) into microdisk resonators, showing an enhancement in single photon emission. Additionally, we construct a confocal microscopy apparatus and demonstrate room-temperature optically-detected magnetic resonance of silicon-vacancy defects in ~50 nm diameter …
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Zinc oxide nanophotonics : toward quantum photonic technologies
… the visible light emission. Hexagonal ZnO microdisks with diameter ranging from 3 μm to 15 μm were grown by a carbothermal reduction method. Optical characterization of ZnO microdisks was performed using low temperature (80 K) CL imaging and spectroscopy. The green emission is found to be …
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A Photonic Quantum Sensor
This thesis characterizes a quantum node comprising an atom and a microresonator. The electric field of the microresonator is simulated using the finite element method. An approximating analytical solution of the microresonator is proposed and compared to the finite element method simulation. …