摘要:
The present invention provides an electromagnetic wave generation apparatus that is compact and generates a high power terahertz wave. An electromagnetic wave generation apparatus includes: a substrate; a first electrode, having a photoelectron emitting part, formed on one of the surfaces of the substrate; a second electrode formed on the surface of the substrate; a power supply source that applies voltage to between the first electrode and the second electrode so that the potential of the second electrode becomes higher than the potential of the first electrode; and a light source that radiates one of time modulated light and wavelength modulated light, and in the apparatus, the photoelectron emitting part (a) emits electrons when light is irradiated and (b) is placed at a position which an incident light from the light source enters and from which the emitted electrons run to the electron incidence plane of the second electrode.
摘要:
A sheet feeding device includes: a sheet feeding tray adapted to stack a sheet bundle including a plurality of sheets thereon; a blowing section which blows air against a leading edge of the sheet bundle in a sheet conveyance direction from a front side of the sheet conveyance direction; a sticking and conveying section which sticks an uppermost sheet stacked on the sheet feeding tray by air sucking, and feeds the uppermost sheet to a conveyance roller; a sucking duct provided inside the sticking and conveying section, which is divided into a plurality of ducts in the sheet conveyance direction; and an intercepting member which intercepts at least one of the plurality of divided ducts.
摘要:
A semiconductor light-emitting device includes a light-emitting layer and a light extraction layer formed on the light-emitting layer and made of a resin material containing particles. The maximum size of each of the particles contained in the light extraction layer is smaller than the wavelength of emitted light penetrating through the light extraction layer.
摘要:
A nitride semiconductor device includes an active layer including a first nitride semiconductor layer and a second nitride semiconductor layer which are periodically stacked, the second nitride semiconductor layer having a different composition from a composition of the first nitride semiconductor layer. An energy at a lower edge of a conduction band in the first nitride semiconductor layer is lower than an energy at a lower edge of a conduction band in the second nitride semiconductor layer, and an energy at an upper edge of a valence band in the first nitride semiconductor layer is lower than an energy at an upper edge of a valence band in the second nitride semiconductor layer.
摘要:
First, an electrode is formed on an insulation layer that has been formed on a silicon substrate, when manufacturing an infrared detection device. The electrode has a shape matching that of a thermal resistance element constituting the infrared detection device. A semiconductor substrate is placed in a reaction chamber, given a predetermined potential, and heated. Next, a material of a thermal resistor substance constituting the thermal resistance element is vaporized into a gaseous material, and the gaseous material is ion-clusterized and supplied into the reaction chamber. The gaseous material collects toward the electrode as a result of an action of an electric field generated by giving the electrode the predetermined potential. The gaseous material that came into contact with the electrode is stabilized by receiving electrons, and thermally decomposes, thus growing a thermal resistor substance on the electrode.
摘要:
An initialization method of an optical recording medium having a plurality of optical recording layers capable of reducing initialization unevenness due to light interference caused at the time of initialization without deteriorating information recording/reproducing signal characteristics of the optical recording layers is provided. An initialization method of an optical recording medium, wherein a second optical recording layer and a first optical recording layer are stacked via an interlayer on a substrate in an order, a protective layer is formed further on the first optical recording layer, a recording film in the first optical recording layer comprises a phase change type recording material, and a recording/reproducing light is irradiated from the protective film side at the time of recording/reproducing, and in a step of initializing by irradiating an initializing light on the first optical recording layer from the protective film side, the first optical recording layer is initialized so that an energy density ID1 per unit area of an incident light of the initializing light at respective points in a light convergence region converged on the first optical recording layer and an energy density ID2 per unit area at the respective points of the light convergence region of a return light, which is the initializing light transmitted through the first optical recording layer to reach the second optical recording layer, reflected on the second optical recording layer and again returned to the first optical recording layer, satisfy ID2/ID1≦0.002.
摘要:
According to the present invention, a first p-side electrode 7A made of metal which is provided with regularly arranged holes 10 having a diameter smaller than a laser oscillation wavelength and a second p-side electrode 7B arranged around the periphery of the first p-type electrode 7A are used as a p-side mirror of a surface-emitting laser. Light in a resonator formed of a p-side electrode 7 and an n-type mirror 2 is first converted to a surface plasmon and then reconverted to the light by the p-side electrode 7A, and then emitted outside the resonator. This improves the light transmittance, thereby permitting use of metal which is considered to have inherently low light transmittance as a material for the p-side electrode 7. If the p-side electrode 7 is made of metal, operating voltage is reduced and heat dissipation improves, without causing a spike in a valence band, which occurs when a semiconductor layer is used. Further, due to the nonlinear effect of the mirror, optical feedback to the inside of the resonator is controlled, whereby a laser device with excellent noise characteristic is obtained.
摘要:
A sheet feeding apparatus includes a sheet feeding roller that comes in contact with stacked sheets and feeds sheets one by one from the top, wherein an air outlet is provided so that air can be blown onto the upper part of the stacked sheets from the lateral side in the sheet feeding direction, and a floatation suppression member for suppressing floatation of the sheets is provided between the air outlet and the sheet feeding roller and spaced apart from the uppermost surface of the stacked sheets.
摘要:
A bidirectional switching device includes a semiconductor multilayer structure made of a nitride semiconductor, a first ohmic electrode and a second ohmic electrode which are formed on the semiconductor multilayer structure, and a first gate electrode and a second gate electrode. The first gate electrode is covered with a first shield electrode having a potential substantially equal to that of the first ohmic electrode. The second gate electrode is covered with the second shield electrode having a potential substantially equal to that of the second ohmic electrode. An end of the first shield electrode is positioned between the first gate electrode and the second gate electrode, and an end of the second shield electrode is positioned between the second gate electrode and the first gate electrode.