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 92 for “"Nanophotonics"”.
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Nonlinear design in nanophotonics
In the first part of this thesis, we present a new technique for the design of transformation optics devices based on large-scale optimization to achieve the optimal effective isotropic dielectric materials within prescribed index bounds. In addition to the optimization, a key point is the …
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Computation & design for nanophotonics
… has made computers a reliable design tool in nanophotonics. Given that almost any 2d pattern can be fabricated at infrared length scales, there exists a large number of degrees of freedom in nanophotonic device design. However current designs are adhoc and could potentially benefit from …
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Fluctuation-induced interactions and nonlinear nanophotonics
We present theoretical and numerical methods for studying Casimir forces and nonlinear frequency conversion in nanophotonic media consisting of arbitrary geometries and materials. The first section of the thesis focuses on the study of various geometry-enabled resonant effects leading to strong …
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Nanophotonics for tailoring light-matter interaction/
… this thesis, we will theoretically explore three nanophotonics phenomena which enable strong light-matter interaction. The first phenomenon is plasmonic resonance, where the surface plasmon mode at metal and dielectric boundaries significantly enhances the optical response of nanoparticles. We …
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Zinc oxide nanophotonics : toward quantum photonic technologies
… devices. Driven by the rapid advance of nanophotonics, it is necessary to develop single photon sources (SPSs) and optical resonators in new class of materials. In particular, SPSs are required for a wide range of applications in quantum information science, quantum cryptography, and …
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Inverse Design of Random Emitters in Nanophotonics
Incoherent light from random emitters, such as thermal radiation, are very common in nature. However, modeling such random emitters may be challenging, as it naively requires Maxwell’s equations to be solved for all emitters to obtain the total response, which becomes computationally intractable in …
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Nanophotonics for dark materials, filters, and optical magnetism
<p>Research on nanophotonic structures for three application areas is described, a near perfect optical absorber based on a graphene/dielectric stack, an ultraviolet bandpass filter formed with an aluminum/dielectric stack, and structures exhibiting homogenizable magnetic properties at infrared …
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Nanoplasmonics and silicon nanophotonics devices for sensing applications
Nanophotonics deals with the interaction of light with matter in nanometer scale. One of the subsets of nanophotonics is nanoplasmonics, which deals with manipulation of light using the unique optical properties of metal nanostructures. Manipulation of light in nanoscale using properties of surface …
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Methodology and applications of topology optimization in nanophotonics
… research and development of inverse design for nanophotonics as it can surpass the limitations of brute-force design by intuition and few-parameter sweeps. We studied the inverse design approach to photonic device design, and this dissertation presents our work in advancing current topology …
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A fast 3D full-wave solver for nanophotonics
Conventional fast integral equation solvers seem to be ideal approaches for simulating 3-D nanophotonic devices, as these devices are considered to be open structures, generating fields in both an interior channel and in the infinite exterior domain. However, many devices of interest, such as …
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Nanolaminated Plasmonics: from Passive to Active Nanophotonics Devices
Plasmonics can achieve the tight optical confinement and localization in the subwavelength domain. Surface plasmon polaritons (SPPs) are closely related to coupling to emitters in excitation and emission, waveguiding, and active modulating on the nanoscale. Due to these phenomenon, plasmonic …
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Computational Modelling of Nanoscale Interactions for Nanophotonics and Biosensing
In the pursuit of understanding molecular behaviour, advanced sensing techniques have been developed to detect things that would otherwise not be visible to the naked human eye. A subclass of these techniques relies on the resonant properties of optical whispering gallery modes (WGMs) to detect …
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Programmable nanophotonics for quantum information processing and artificial intelligence
… quantum transport, deep learning with coherent nanophotonics, heralded single-photon sources, and highly integrable superconducting nanowire single-photon detectors.
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Nano Vacuum Channel Devices for Electronics and Ultrafast Nanophotonics
Recent years have seen a surge of interest in nano vacuum channel (NVC) devices due to their low power requirements, radiation hardness, integrability, and ultrafast switching times. Planar NVC devices are ideal candidates for electronics that need to operate in harsh environments such as space. …
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Nanophotonics for tailoring the flow of thermal electromagnetic radiation
In this thesis, we explore the interaction of thermal radiation with nano-scale structures. First, we introduce the concept of radiative energy transfer between two objects of different temperatures in the near field, and theoretically argue that the radiation tunneling of evanescent surface modes …
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Fabrication of Fluorescent Nanoprobes and Their Applications in Nanophotonics
… nanoprobes to many different applications in nanophotonics, including near field imaging, nonlinear optics mapping, and quantum electrodynamics. We have custom designed an optical system for this nanoprobe fabrication. We have characterized the nanoprobes using transmission electron microscope …
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Multimodal Optical Interfaces Enabled by Multiresonant Plasmonics for Bio-Nanophotonics
… hold significant promise for applications in bio-nanophotonics, targeted drug delivery, and cellular biochemical analysis, offering a pathway for advancing molecular diagnostics, minimally invasive therapies, and precise nanosurgery. As a proof-of-concept, a vapor nanobubble-enabled regenerative …
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Nanophotonics-enabled Solar Membrane Distillation for Off-grid Water Purification
… makes it energy intensive. Here we demonstrate nanophotonics-enabled solar membrane distillation (NESMD), where highly localized photothermal heating induced by solar illumination alone drives the distillation process, entirely eliminating the requirement of heating the input water. Unlike MD, …
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