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 20 of 682 for “"Optoelectronic"”.
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Optoelectronic fiber interface design
Recent developments in materials science have led to the development of an exciting, new class of fibers which integrate metals, semiconductors and insulators in the same codrawing process. Various electrical devices have been produced in these fibers including optical sensors, thermal sensors and …
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Micro-led based optoelectronic tweezers
… micro-LEDs as a compact illumination source in optoelectronic tweezers systems is explored. The emerging technique of optoelectronic tweezers uses light patterns to generate electric field gradients to trap and manipulate single cells. Micro-LEDs offer an advantageous alternative to current …
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III-V Bismide Optoelectronic Devices
… epitaxy growth, and fabrication of III-V bismide optoelectronic devices, which are of great importance in modern applications of telecommunication, gas sensing, environment monitoring, etc. In the current room-temperature continuous-wave operational GaSb-based type-I InGaAsSb/AlGaInAsSb quantum …
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Optical and optoelectronic fiber devices
The ability to integrate materials with disparate electrical, thermal, and optical properties into a single fiber structure enabled the realization of fiber devices with diverse and complex functionalities. Amongst those, demonstrated first in our work, are the surface-emitting fiber laser, the …
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VLSI microdisplays and optoelectronic technology
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Optoelectronic processes in polyfluorene ambipolar transistors
This thesis describes the use of charge modulation spectroscopy to investigate the negative and positive charge-induced absorptions in conjugated semiconducting polymers as a way to experimentally compare the wavefunctions of electrons and holes. Interactions between light and charges including …
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Nano-structured materials for optoelectronic devices
… desired nano-structures for solution-processable optoelectronic devices such as solar cells and light-emitting diodes (LEDs), and examine structure-performance relationships in these devices. Short exciton diffusion length limits the efficiency of most exciton-based solar cells. By introducing …
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Smoothing silver nanowires for optoelectronic applications
Silver nanowire meshes have shown potential for becoming a more robust, flexible alternative to traditional ceramic and brittle metal oxides. However, the current methods employed at making these films are not scalable and the high aspect ratios limit their final use. Spray coating is a technique …
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Organic LEDs for optoelectronic neural networks
… assess their suitability for use in the Compact Optoelectronic Integrated Neural (COIN) coprocessor. The COIN coprocessor, a prototype artificial neural network implemented in hardware, seeks to implement neural network algorithms in native optoelectronic hardware in order to do parallel type …
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Excitonic spin engineering in optoelectronic devices
Despite decades of research, solar cell efficiencies struggle to get higher than 25%. This is due to two fundamental losses in the device: thermalization of high energy photons and transmission of low energy photons. In this work, we demonstrate efforts to improve both these losses, which, when …
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Optoelectronic fiber webs for imaging applications
… of novel visible and infrared light-sensitive optoelectronic fiber in the development of large scale photodector arrays. Unlike conventional point photodetectors these one-dimensional linear photodectors are capable of sensing light along the entire length of the fiber and 360 radially. …
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Design of optoelectronic activation, local memory and weighting circuits for Compact Integrated Optoelectronic Neural (COIN) Co-processor
The Compact Integrated Optoelectronic Neural (COIN) Co-processor, a prototype of artificial neural network implemented in hybrid optics and optoelectronic hardware, aims to implement a multi-layer neural network algorithm by performing parallel and efficient neural computations. In this thesis, we …
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Optoelectronic properties of size-selected silicon nanocrystals
Thin films of silicon nanocrystals (Si-nc) were produced by laser pyrolysis of silan and accumulated on various substrates. Layer growth, optical properties, charge transport, photoluminescence (PL) and electroluminescence (EL) were investigated on these porous layers. A stick-ball model for layer …
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New Carbazole Based Materials for Optoelectronic Applications
… for organic materials to be used for optoelectronic applications. Before the new materials were finally tested in transistor devices, a suitable surface treatment of the OFET substrates was developed. By introducing self-assembled monolayers, prepared from hexamethyldisilazane (HMDS), …
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Physics of intraband quantum dot optoelectronic devices
… lifetimes in quantum dots, it is expected that optoelectronic devices based on intraband transitions in self-assembled quantum dots would have superior performance to their quantum well counterparts. In order to fully exploit this prospect, appropriate theoretical models describing electronic, …
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Full-band NEGF Modeling of Optoelectronic Devices
L'abstract è presente nell'allegato / the abstract is in the attachment
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Nanoscale Selective Area Epitaxy for Optoelectronic Devices
… potential applications to quantum electronic and optoelectronic devices they present. The nonuniformity and random ordering resulting from the self-assembly processes, however, are detrimental to potential applications, prohibiting the type of engineering control necessary for complex systems. The …
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Precision Self -Alignment Techniques for Optoelectronic Integration
… the integration and precise self-alignment of optoelectronic components are presented. State-of-the-art self-alignment accuracies have been achieved using solder bump arrays for component alignment and etched V-grooves for optical fiber alignment. The self-alignment potential of eutectic …
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Resonant Cavity Enhanced Photodetectors and Optoelectronic Switches
… investigation of novel structures consisting of optoelectronic devices integrated into Fabry-Perot resonant cavities. The photosensitivity of conventional detectors is governed by the optical properties of the semiconductor material requiring thick absorption regions for high quantum …
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