Download or read book Theoretical Investigations Into Apertureless Scanning Near Field Optical Microscopy Systems written by Anna Linda Demming and published by . This book was released on 2006 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Building Practical Apertureless Scanning Near field Microscopy written by Muhammed Zeki Gungordu and published by . This book was released on 2010 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental objective of this study is to establish a functional, practical apertureless type scanning near-field optical microscope, and to figure out the working mechanism behind it. Whereas a far-field microscope can measure the propagating field's components, this gives us little information about the features of the sample. The resolution is limited to about half of the wavelength of the illuminating light. On the other hand, the a-SNOM system enables achieving non-propagating components of the field, which provides more details about the sample's features. It is really difficult to measure because the amplitude of this field decays exponentially when the tip is moved away from the sample. The sharpness of the tip is the only limitation for resolution of the a-SNOM system. Consequently, the sharp tips are achieved by using electrochemical etching, and these tips are used to detect near-field signal. Separating the weak a-SNOM system signals from the undesired background signal, the higher demodulation background suppression is utilized by lock-in detection.

Download or read book Modulated Signal Analysis of Apertureless Scanning Near Field Optical Microscopy written by 莊錦和 and published by . This book was released on 2008 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Apertureless Scanning Nearfield Optical Microscopy with Ultra high Temporal Resolution written by Matthias Brandstetter and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Near field Scanning Optical Microscopy Studies of Photonic Structures and Materials written by Anthony Louis Campillo and published by . This book was released on 2002 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Theoretical Investigation of Information Limits of Scanning Optical Systems written by Control Data Corporation and published by . This book was released on 1967 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Implementation of an Apertureless Scanning Near Field Optical Microscope for the Infrared Spectrum written by Jens Dorfmüller and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigations and Developments Towards a Calibration Standard for Scanning Near Field Optical Microscopy written by Matthias Marcus Wellhöfer and published by . This book was released on 2002 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of Nanoscale Features Using Apertureless Near field Scanning Optical Microscopy and Development of a Prototype Commercial Inkjet Analysis Instrument written by R. H. Farahi and published by . This book was released on 2000 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scanning Near field Optical Microscopy Transfer Function and Resolution Limit written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present scanning near-field optical microscopy as an optical instrument characterized by a transfer function. This approach gives some theoretical guidelines for the design of near-field optical measurement systems. We emphasize that it is important to distinguish between the resolution for the optical field and the resolution for the object. In addition, to solve the general inverse diffraction problem the measurement of phase and amplitude of the electromagnetic field is necessary.

Download or read book Chemical Imaging Analysis written by Freddy Adams and published by Elsevier. This book was released on 2015-06-06 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical Imaging Analysis covers the advancements made over the last 50 years in chemical imaging analysis, including different analytical techniques and the ways they were developed and refined to link the composition and structure of manmade and natural materials at the nano/micro scale to the functional behavior at the macroscopic scale. In a development process that started in the early 1960s, a variety of specialized analytical techniques was developed – or adapted from existing techniques – and these techniques have matured into versatile and powerful tools for visualizing structural and compositional heterogeneity. This text explores that journey, providing a general overview of imaging techniques in diverse fields, including mass spectrometry, optical spectrometry including X-rays, electron microscopy, and beam techniques. Provides comprehensive coverage of analytical techniques used in chemical imaging analysis Explores a variety of specialized techniques Provides a general overview of imaging techniques in diverse fields

Download or read book Scanning near field optical microscopy and spectroscopy written by Günter Heinz Guttroff and published by . This book was released on 1995 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scattering Scanning Near Field Optical Microscopy on Anisotropic Dielectrics written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Near-field optical microscopy allows the nondestructive examination of surfaces with a spatial resolution far below the diffraction limit of Abbe. In fact, the resolution of this kind of microscope is not at all dependent on the wavelength, but is typically in the range of 10 to 100 nanometers. On this scale, many materials are anisotropic, even though they might appear isotropic on the macroscopic length scale. In the present work, the previously never studied interaction between a scattering-type near-field probe and an anisotropic sample is examined theoretically as well as experimentally. In the theoretical part of the work, the analytical dipole model, which is well known for isotropic samples, is extended to anisotropic samples. On isotropic samples one observes an optical contrast between different materials, whereas on anisotropic samples one expects an additional contrast between areas with different orientations of the same dielectric tensor. The calculations show that this anisotropy contrast is strong enough to be observed if the sample is excited close to a polariton resonance. The experimental setup allows the optical examination in the visible and in the infrared wavelength regimes. For the latter, a free-electron laser was used as a precisely tunable light source for resonant excitation. The basic atomic force microscope provides a unique combination of different scanning probe microscopy methods that are indispensable in order to avoid artifacts in the measurement of the near-field signal and the resulting anisotropy contrast. Basic studies of the anisotropy contrast were performed on the ferroelectric single crystals barium titanate and lithium niobate. On lithium niobate, we examined the spectral dependence of the near-field signal close to the phonon resonance of the sample as well as its dependence on the tip-sample distance, the polarization of the incident light, and the orientation of the sample. On barium titanate, analogous measurements wer.

Download or read book A Phase Contrast Imaging Technique for Near field Scanning Optical Microscopy written by Andrew David Woodfin and published by . This book was released on 1998 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: A technique allowing for phase contrast imaging with a near-field scanning optical microscope is discussed. Background theory relating to near-field scanning optical microscopy (NSOM) is presented, in addition to relevant aspects of interferometry. A brief discussion of currently available methods for phase contrast imaging in both near-field and far-field microscopy is presented. Theory regarding the proposed technique, which exploits the interference of electrooptically modulated light and a conventional NSOM signal, is discussed in detail. Phase data using the proposed technique in a simplified configuration is presented to validate its effectiveness. The experimental arrangement used for data collection is specified. Finally, phase data obtained using the proposed technique in conjunction with a near-field microscope is examined and assessed in comparison with the results expected from prior knowledge of the sample under study.

Download or read book Investigation of Tapping mode Scanning Near field Optical Microscope written by Yi-ting Huang and published by . This book was released on 2001 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A crucial part of the Scanning Near-Field Microscope (SNOM) is the distance regulation that keeps the separation of a fiber probe tip and the sample surface constant. Previously, shear-force detection was implemented. Shear-force interactions have the disadvantage of being destructive on soft sample. The implementation of an alternative tapping-mode is investigated in this thesis. In tapping-mode, the fiber tip oscillates perpendicularly to the sample surface, thus avoiding the destructive lateral shear-force." --

Download or read book Near Field Optical Spectroscopy on Photonic Metamaterials written by Daniela Diessel and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2011-06 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most photonic metamaterials consist of basic building blocks which are specifically engineered to exhibit electromagnetic resonances. These determine the optical properties of the material, thus rendering possible novel optical properties, such as magnetic responses at optical frequencies, negative permittivities and permeabilities, and even negative refractive indices. With these characteristics metamaterials expanded the range of what can be realised in optics, stimulating a vibrant and fast-growing field of fundamental research. In this work, the field distributions of resonant modes in selected 2-D metamaterials are investigated experimentally as well as numerically. Spectroscopic experiments are carried out with scanning near-field optical microscopes with aperture probes in collection mode. For the complementing numerical studies a theoretical model of the transmission process through the near-field aperture probes is introduced. This model is discussed and data derived with the model are used to corroborate the experimental results.

Download or read book New Scanning Methods in Near field Optical Microscopy written by Arnold Simon and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: