Abstract: The present invention provides a fluorescent diamond containing an MV center emitting fluorescence at a concentration of 1×1014/cm3 or higher, where M represents a metal or metalloid, and V represents a vacancy.

Abstract: Disclosed is an ion beam irradiation apparatus including: a plurality of plate-like grid electrodes arranged in a beam irradiation direction so as to overlap each other and each having a plurality of apertures; a power supply unit that applies a voltage to each of the grid electrodes; and a controller that controls the voltage applied to each of the grid electrodes by the power supply unit. The plurality of grid electrodes include first to fourth grid electrodes. Central axes of apertures of the first grid electrode and apertures of the second grid electrode are coaxial along the beam irradiation direction, and a central axis of apertures of the third grid electrode is offset in a direction orthogonal to the beam irradiation direction with respect to the central axes of the apertures of the first grid electrode and the second grid electrode.

Abstract: Disclosed is an ion beam irradiation apparatus including: a plurality of plate-like grid electrodes arranged in a beam irradiation direction so as to overlap each other and each having a plurality of apertures; a power supply unit that applies a voltage to each of the grid electrodes; and a controller that controls the voltage applied to each of the grid electrodes by the power supply unit. The plurality of grid electrodes include first to fourth grid electrodes. Central axes of apertures of the first grid electrode and apertures of the second grid electrode are coaxial along the beam irradiation direction, and a central axis of apertures of the third grid electrode is offset in a direction orthogonal to the beam irradiation direction with respect to the central axes of the apertures of the first grid electrode and the second grid electrode.

Abstract: Disclosed herein is a fluorescence measurement device for a living body configured to be able to reduce wavelength components that will become leak light and to easily switch a wavelength and an irradiation direction.

Abstract: Observation of a living body sample from multiple directions can be measured in a short time and with a convenient structure. One two-dimensional detector is arranged in order to pick up the image of light emitted from a sample on a sample holder, and connected with a display for displaying the image picked up by means of the two-dimensional detector. In order to observe the sample on the sample holder from a plurality of directions and to introduce the image of light emitted from the sample in each direction to the two-dimensional detector, a light guide optical system including a multi-reflector assembly consisting of reflectors is provided. A main image formation lens for forming on the two-dimensional detector a plurality of images introduced by the light guide optical system is arranged between the two-dimensional detector and the light guide optical system.

Abstract: Disclosed herein is a fluorescence measurement device for a living body configured to be able to reduce wavelength components that will become leak light and to easily switch a wavelength and an irradiation direction.

Abstract: A magnetoresistance effect element, a head of the magnetoresistance effect type and a memory element in each of which a larger MR change can be acquired in a smaller magnetic field, and a method of producing the magnetoresistance effect element. In a magnetoresistance effect element, the basic structure comprises a lamination body of a magnetic layer/a nonmagnetic insulating layer/a magnetic layer, and a nonmagnetic insulating layer has, at an exposed part thereof, a conductive portion sufficiently smaller than the contact portion of the nonmagnetic insulating layer with respect to the magnetic layers, the conductive portion electrically connecting the magnetic layer to each other. Electrode lead portions are disposed at the upper and lower magnetic layers. In the lamination body, there may be formed, in the nonmagnetic insulating layer, a column-like conductive portion which is sufficiently smaller than the contact portion of the nonmagnetic insulating layer with respect to the magnetic layers.

Abstract: A Josephson junction includes a substrate, a first superconducting layer, a second superconducting layer transversely overlaid on the first layer with an insulating layer interposed therebetween, the insulating layer is an oxide or a nitride of the superconducting material, and the insulating layer including a low oxygen- or nitrogen-concentrated area in contact with each of the first and second layers. A process for fabricating the Josephson junction includes the steps of preparing a substrate, forming a first superconducting layer, forming a second superconducting layer transversely on the first layer with an insulating layer interposed therebetween wherein the insulating layer is an oxide or nitride of the superconducting material, and injecting ion beams into the insulating layer so as to form low oxygen- or nitrogen-concentrated area linking the first and second layers.

Abstract: A particle beam is irradiated locally to a film of an alloy or compound containing atoms of two or more elements, causing atoms of a specific element in the film to selectively recoil to the outside of the film, such that there is formed, inside of the film, a zone in the form of a pattern in which the rate of the atoms of the specific type is smaller than in other portions of the film. In the fine pattern thus formed, the thickness is substantially equal to that of the film, and other sizes are determined according to the particle beam irradiation zone. For example, when a focused ion beam is used as the particle beam, there can be formed a fine pattern on the 10-nm level with precision of the order of nm. This fine pattern can be a quantum wire, a quantum dot or the like. It is therefore possible to produce, with good reproducibility, a device in which a quantum effect has been utilized.

Abstract: A process for fabricating the Josephson junction includes the steps of preparing a substrate, forming a first superconducting layer, forming a second superconducting layer transversely on the first layer with an insulating layer interposed therebetween wherein the insulating layer is an oxide or nitride of the superconducting material, and injecting ion beams into the insulating layer so as to form low oxygen- or nitrogen-concentrated area linking the first and second layers.

Abstract: A focused ion beam apparatus which includes an ion source, an extraction electrode for extracting ion beams from the ion source, a condenser lens for focusing the ion beam, a mass spectrometer for separating a desired ion species from the extracted ion beams, a target stage adapted to support a target, deflection electrodes for deflecting the ion beam taken from the mass spectrometer, and guiding same to the target on the stage, wherein the condenser lens group includes an objective lens located immediately before the target stage, and including a decelerating field circuit for forming a decelerating field between the target stage and the outermost electrode of the objective lens, the deflection electrode having a two-stage structure consisting of a first and second group of deflection electrodes in the advancing direction of ion beam, wherein the ion beam deflected by the deflection electrodes is caused to pass through the center of the objective lens irrespective of the amount of beam deflection.

Abstract: An acceleration/deceleration tube comprises a plurality of pairs of opposing electrodes alternatively positioned to be orthogonal along the opposing direction and overlapped by each other along the direction of the common axis, and a DC power source provided for applying specific DC voltages with a potential difference of a particular direction to each of the pairs of opposing electrodes according to the arrangement order along the common axis.