摘要:
The present invention provides a practically effective three-dimensional photonic crystal, and a process for the production thereof as well as a probe used therefor wherein a three-dimensional photonic crystal comprises a plurality of two-dimensional photonic crystal plates each provided with through holes and different types of two-dimensional photonic crystals; a plurality of positioning members to be located in the above-described through holes in the plurality of the two-dimensional photonic crystal plates; and the above-described positioning members being located in the through holes in the two-dimensional photonic crystal plates adjacent to each other among the pluralities of two-dimensional photonic crystal plates to be laminated in such that the pluralities of the two-dimensional photonic crystal plates obtain a periodic structure in response to wavelengths of light.
摘要:
A method of crystal growth is provided which can suppress development of dislocations and cracks and a warp in a substrate. The method of crystal growth of a group III nitride semiconductor has: a step of heating a silicon substrate; and a step of forming a depressed structure on the substrate surface by advance-feeding onto the heated silicon substrate a gas containing at least TMA (trimethylaluminum).
摘要:
An object is to provide an ultraviolet light-emitting device in which a p-type semiconductor which has high conductivity and an emission peak in ultraviolet region, and emits light efficiently is used. The p-type semiconductor is prepared by supplying a p-type impurity raw material at the same time or after starting supply of predetermined types of crystal raw materials, besides before starting supply of other types of crystal raw materials than the predetermined types of crystal raw materials in one cycle wherein all the types of crystal raw materials of the plural types of crystal raw materials are supplied in one time each in case of making crystal growth by supplying alternately the plural types of crystal raw materials in a pulsed manner.
摘要:
The present invention provides a practically effective three-dimensional photonic crystal, and a process for the production thereof as well as a probe used therefor wherein a three-dimensional photonic crystal comprises a plurality of two-dimensional photonic crystal plates each provided with through holes and different types of two-dimensional photonic crystals; a plurality of positioning members to be located in the above-described through holes in the plurality of the two-dimensional photonic crystal plates; and the above-described positioning members being located in the through holes in the two-dimensional photonic crystal plates adjacent to each other among the pluralities of two-dimensional photonic crystal plates to be laminated in such that the pluralities of the two-dimensional photonic crystal plates obtain a periodic structure in response to wavelengths of light.
摘要:
Disclosed is a method of producing echelette gratings using a beam of electrically charged particles to bomber a masked substrate. The shape and blazed angle ".delta." of the echelette grating is controlled by putting the substrate at a selected slant angle ".theta." with regard to the beam of electrically charged particles.
摘要:
A method of crystal growth is provided which can suppress development of dislocations and cracks and a warp in a substrate. The method of crystal growth of a group III nitride semiconductor has: a step of heating a silicon substrate; and a step of forming a depressed structure on the substrate surface by advance-feeding onto the heated silicon substrate a gas containing at least TMA (trimethylaluminum).
摘要:
For the purpose of emitting light in an ultraviolet short-wavelength region having a wavelength of 360 nm or shorter, it is arranged in InAlGaN in such that a ratio of composition of In is 2% to 20%, a ratio of composition of Al is 10% to 90%, and a total of ratios of composition in In, Al, and Ga is 100%.
摘要:
An apparatus for dry cleaning a surface includes a laser generator, a laser beam homogenizer, an aperture and a lens that are controlled by a CPU. The laser is preferably a KrF excimer laser although any laser capable of generating a pulsed output in the ultraviolet spectrum may be used. The lens is preferably a plano-convex lens. Articles to be cleaned are placed on a conveyor that transports the article through the laser beam. The CPU can store parameters for optimizing removal of a particular contaminant. These parameters may include the frequency of the pulse beam generated by the laser, the shape of the aperture, the position of the lens is controlled by a stage, and the speed of the conveyor belt.
摘要:
An X-ray microscope utilizing X-rays radiating from a laser-irradiated target so as to form an X-ray image of a specimen placed in a sample cell, the X-ray microscope includes a target for radiating X-rays when the same is irradiated with a laser beam, a sample cell for housing a specimen, the sample cell provided near the surface of target placed opposite to where the target is irradiated with the laser beam, and a detector for forming an X-ray image of the specimen by X-ray penetration, wherein the target, the sample cell and the detector are unified in a unit. The unit is placed at a place where the laser beam is irradiated to the target. A spacer is provided between the target and the sample cell, wherein the size of the spacer is determined depending on a distance between the specimen and the target. With this construction, this facilitates the fabrication of the unit. The unit is placed in the miniature vacuum chamber which comprises a division for housing the unit, and a space provided toward the target. And the vacuum chamber housing the unit is placed in an X-ray microscope.
摘要:
An object is to provide an ultraviolet light-emitting device in which a p-type semiconductor which has high conductivity and an emission peak in ultraviolet region, and emits light efficiently is used. The p-type semiconductor is prepared by supplying a p-type impurity raw material at the same time or after starting supply of predetermined types of crystal raw materials, besides before starting supply of other types of crystal raw materials than the predetermined types of crystal raw materials in one cycle wherein all the types of crystal raw materials of the plural types of crystal raw materials are supplied in one time each in case of making crystal growth by supplying alternately the plural types of crystal raw materials in a pulsed manner.