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 27 for “"Near field scanning"”.
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Optimisation of a Near-Field Scanning System
In this thesis, the optimisation of a near field scanning system is discussed. This system, which consists of a stationary transmitter and a movable receiver, is in use in the Experimental Physics Department at NUI Maynooth. The position of the receiver is controlled by a two axis mechanical …
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Near-field scanning optical microscopy with laser trapping
… comprehensive understanding of particle-trapped near-field scanning optical microscopy. This technique is unique in that it relies on the collection of scattered evanescent waves from a sample with a laser-trapped particle. In comparison with the other forms of near-field scanning optical …
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Near-Field Scanning Optical Tomography: Theory and Modalities
Other possible modalities of NSOT are investigated. An experimental configuration with three-dimensional volumetric scan of the probe is studied for the possibility of a tomographic imaging with a fixed-angle illumination. Alternatively, a broadband illumination with one fixed angle or a limited …
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Near Field Scanning Optical Microscopy (NSOM) of nano devices
… of nano-devices using the technique of Near-Field Scanning Optical Microscopy (NSOM). A unique setup to perform Atomic Force Microscopy (AFM) and NSOM simultaneously in a scanning electron microscope (SEM) to collect spatially resolved luminescence and image transport on nano-scale …
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Near-field scanning study for radio frequency interference estimation
… discusses the novel techniques using near-fields scanning to do radio frequency interference (RFI) estimation. As the electronic products are becoming more and more complicated, the radio frequency (RF) receiver in the system is very likely interfered by multiple noise sources …
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Investigation of optical near field using near field scanning optical microscopy
… demand a new tool for characterization. The Near Field Scanning Optical Microscopy (NSOM) has been developed to tackle certain aspects of this problem. The work presented here applies different types of NSOM to explore the near field distribution of metal plasmonic nanostructures.^ Ridge …
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Characterization and modeling of ESD events and near-field scanning calibration structures
… The second topic, a calibration structure for near-field scanning probe calibration application, is discussed in the last paper. In the first paper, software-assisted detection methods are proposed for secondary ESD discharges. The measured waveforms are analyzed with respect to waveform …
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Source reconstructions for IC radiated emissions based on magnitude-only near-field scanning
… an IC by using magnitude-only information during near-field scanning. The phase-retrieval is accomplished during the back-forth iterations between two scanning planes of different heights. The magnitudes of fields on two planes of different heights are recorded and used to constrain the amplitude …
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Quantitative Materials Contrast at High Spatial Resolution With a Novel Near-Field Scanning Microwave Microscope
A novel Near-Field Scanning Microwave Microscope (NSMM) has been developed where a Scanning Tunneling Microscope (STM) is used for tip-to-sample distance control. The technique is non-contact and non-destructive. The same tip is used for both STM and NSMM, and STM helps maintain the tip-to-sample …
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Near Field Scanning Optical Microscopy: Instrument Engineering and the Investigation of Porous Gallium Arsenide Structure-Property Relationships
The design, fabrication and use of a near field scanning optical microscope to investigate the structure-property relationships of porous gallium arsenide is reported. Novel porous gallium arsenide (GaAs) surfaces containing crystalline features were formed through an electrochemical corrosion …
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An Improved dipole-moment model based on near-field scanning for characterizing near-field coupling and far-field radiation from an IC
… an improved IC radiated emission model based on near-field measurements is proposed. The regularization technique and the truncated SVD method are employed together with the least square method to calculate the dipole moments from the near-field data. This dipole model has clear physical meaning: …
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Laser assisted nano-optics processing in optical data storage
… techniques, microlens array laser patterning and near-field scanning optical lithography, are presented to show their capabilities in nanostructures fabrication. Laser irradiation through microlens array is used to create nanostructures on phase-change films over a large area. Phase-change …
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Chemical Nanolithography and Single Molecule Optical Imaging With Metal -Coated Probes
… The use of metal-coated AFM tips in apertureless near-field scanning optical microscopy of single molecules is also briefly discussed.
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Efficient estimation and mitigation for radio-frequency interference
… novel RFI mitigation method is proposed. Through near-field scanning of a real product, an equivalent dipole moment of the noise source (CPU and DDR3) is reconstructed, and the near-field components of the victim (Wi-Fi antenna) are measured. By determining the relationship between dipole moment …
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Excitons in Self-Assembled Hybrid Systems of Molecular Aggregate Light-Harvesting Nanotubes: Charge-Transfer Substrates and Solution-Stabilized Nanocomposites
… solution and deposition onto solid substrates. Near-field scanning optical microscopy revealed nanoscale emission of substrate-isolated aggregates was substantially altered after several hours of deposition, suggesting the stability of substrate-immobilized molecular aggregates is dependent on …
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Structure and Dynamic Studies of the Nuclear Pore Complex at the Single-Molecule Level
… energy transfer (FRET), and high-resolution near-field scanning optical microscopy (NSOM) are utilized to specifically locate vault ribonucleoproteins to NPCs. This interaction, along with several other results, strongly suggests that vaults represent the central mass of NPCs. A …
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Fabrication of Fluorescent Nanoprobes and Their Applications in Nanophotonics
… 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 (TEM) and scanning …
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Emission source microscopy for electromagnetic interference source localization
… difficult to localize the sources of radiation. Near-field electromagnetic scanning is used often for root-cause diagnosis by determining field distribution close to the PCB. In the near-field, the evanescent waves are dominant, which may lead to the misinterpretation of them being the dominant …
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Thin film integrated optical waveguides for biosensing using local evanescent field detection
… of the waveguide is a decaying evanescent light field that extends into the cladding layers. The intensity profile of the evanescent field is dependent on the refractive index of the cladding. The changes in the local intensity of the evanescent field can be used to detect refractive index …
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