Abstract:
Le domaine général de l'invention est celui des lentilles à immersion solide pour applications optiques, en microscopie à très haute résolution. La lentille selon l'invention comporte un secteur sphérique (1) limité par une surface plane (11) et un objet (2) de dimensions nanométriques disposé sur la surface plane, au foyer de ladite lentiile à immersion solide. Une couche opaque (3) à la lumière comportant une ouverture centrale (31) de dimensions nanométriques peut être disposée sur fa surface plane, ladite ouverture étant centrée sur le foyer de la lentille à immersion solide. Ce nanoobjet peut être un tube ou un fil de forme cylindrique. La lentille selon l'invention peut être réalisée par des techniques de lithographie.
Abstract:
A method for determining field intensity for a particle on a substrate is disclosed. The method includes providing an incident wave; determining an electric vector of the field and a magnetic vector of the field inside and outside the particle; and determining additional scattered fields inside and outside of the particle due to reflection of the incident wave from the substrate.
Abstract:
Optical fiber probe tips and methods for fabricating the same are presented. One method entails immersing a distal end of an optical fiber having a cladding and a core into an etching solution and simultaneously etching the cladding and the core using the etching solution for tapering the cladding and the core to form a tapered cladding and a tapered core tip. The optical fiber probe tips are suitable for near-field, scanning, optical microscopy (NSOM).
Abstract:
Methods of recording optical near field interaction signals in the infra red region are disclosed, comprising the following steps: illumination of a combination of objects with at least two objects (1, 2) using infra-red irradiation, such that an infra-red near field coupling is generated between the objects (1, 2) and recording of the scattered light emanating from the object combination which has a component (s) which is modified by the near field coupling. At least one of said objects (1, 2) comprises a polar material, having, at least partly, a polar solid structure and, on illumination, at least one phonon resonance is stimulated in at least one of the objects (1, 2) with the polar material, by means of which the modified portion (s) of the scattered light is amplified. Uses for the method in measurement technology, data storage technology and optical signal processing are also disclosed.
Abstract:
A multiple-source array for illuminating an object including: a source of electromagnetic radiation having a wavelength lambda in vacuum; and a reflective mask positioned to receive the electromagnetic radiation, the reflective mask comprising an array of spatially separated apertures, wherein each aperture comprises a dielectric material defining a waveguide having transverse dimensions sufficient to support one or more guided propagating modes of the electromagnetic radiation extending through the mask, each aperture configured to radiate a portion of the electromagnetic radiation to the object.
Abstract:
An optical cantilever for SNOM which emits and/or detects light through a fine aperture, is excellent in mass-productivity and uniformity and permits a fast observation without damaging even a soft sample, characterized by comprising a base (1), a cantilever (2) extending from the base (1), an optical propagation unit (5) and an optical propagation tip (3) of a dielectric penetrating the cantilever (2) and formed so as to protrude beyond the side opposite to the base of the cantilever with its tip end sharpened, a light shielding film (6) covering around the tip-sharpened dielectric, and a fine aperture (4) formed at the tip end of the dielectric.
Abstract:
A near-field optical device (100), wherein the near-field interaction is subjected to a fundamental modulation at a fundamental frequency Ω, comprises an interferometer device (10) with an illumination light path (I) being directed to the probe (1), a reference light path (II) being directed to a detector device (20) and a signal light path (III) being directed from the probe (1) to the detector device (20), wherein the reference and signal light paths (II, III) are superimposed at the detector device (20), and a demodulation device (30) for determining the signal light components by demodulating the detector output signals, wherein the reference light path (H) does not contain the probe (1), an interferometer phase modulator (40) is arranged in the reference light path (ll) br signal light path (III), and the demodulation device (30) is adapted for determining the signal light components from the detector output signals obtained at three or more different interferometer states.
Abstract:
A sensing apparatus is provided which comprises a chip (20) in which a transmission line (2) for propagating an electromagnetic wave is formed on a substrate (1), an electromagnetic wave generator (7) for generating an electromagnetic wave (10), a coupling means (9), and a detector (5) for detecting a propagation state of an electromagnetic wave at an arbitrary location on the transmission line, of the electromagnetic wave propagating through the transmission line (2). An interaction between an object (4) disposed in the vicinity of the transmission line (2) and the electromagnetic wave is detected by the detector (5) to sense a spatial interaction state of the object (4) with the electromagnetic wave.
Abstract:
The device (1) comprises a microwave resonator (coaxial resonator, 2) with at least one outer conductor (3), which has a hollow cylinder (31) with an inner space (32). This inner space is delimited by a lateral wall (33) of the hollow cylinder having an inside diameter (34) and by an end wall (35) of the hollow cylinder having an opening (36). The inventive device is also provided with at least one inner conductor (4) that is placed in the inner space of the hollow cylinder of the outer conductor. This inner conductor is connected in an electrically conductive manner to the outer conductor and has an inner cylinder (41) with an outer diameter (42), and has a tip (43). This tip is connected to the inner cylinder and serves to emit an electric alternating field with a resonance frequency of the microwave resonator. The tip of the inner conductor is situated inside the opening of the end wall of the hollow cylinder in such a manner that a sample, which is to be placed at a sample distance (51) from the tip of the inner conductor, and the alternating field can interact so that the resonance frequency of the microwave resonator depends on the property of the sample. A ratio consisting of the inner diameter of the hollow cylinder of the outer conductor and of the outer diameter of the inner cylinder of the inner conductor is selected such that a quality of the microwave resonator is less than a maximum quality of the microwave resonator that can be adjusted by the ratio of the diameters. This measure increases the sensitivity of the device. The device is used for determining the electrical property of a sample. The device and the method are used in HTE (High Throughput Experimentation) for characterizing combinatorial material libraries.
Abstract:
An apparatus for producing a small spot of optical energy comprises a planar waveguide shaped to direct a linearly polarized electromagnetic wave to a focal point within the waveguide, and a metallic pin positioned at the focal point whereby the linearly polarized electromagnetic wave creates surface plasmons on a surface of the pin. The apparatus can further comprise means for phase shifting a portion of the linearly polarized electromagnetic wave. Recording heads comprising a magnetic write pole, a planar waveguide positioned adjacent to the magnetic write pole, the planar waveguide being shaped to direct a linearly polarized electromagnetic wave to a focal point within the waveguide, and a metallic pin positioned at the focal point whereby the linearly polarized electromagnetic wave creates surface plasmons on a surface of the pin, and disc drives that use such recording heads are also disclosed.