摘要:
Provided is an optical apparatus having high durability, less optical absorption than a hole-type metal thin film filter, high transmittance and high reflectance, and variable optical characteristics. The apparatus includes: a dielectric substrate; a metal structure group including multiple metal structures two-dimensionally and discretely disposed at regular intervals; and a dielectric layer covering the metal structure group, in which: the metal structures have a first length equal to or shorter than a predetermined wavelength in a visible light region in one direction, and a second length equal to or shorter than the wavelength in a perpendicular direction; and the metal structures resonates with light entering the dielectric substrate or the dielectric layer, having a variable dielectric constant, to generate localized surface plasmon resonance on a surface of the metal structures to have a minimum transmittance or a maximum reflectance of the light having the wavelength.
摘要:
A communication terminal includes a CPU (28). The CPU (28) issues to a router (16) a send request for requesting the router (16) to send an ask signal for repetitive responses to a server (14). Then, the ask signal is sent to the server (14) by the router (16), and a receive port is temporarily opened. From the server (14), a response signal is repeatedly sent in response to the ask signal. To the response signal, time information representative of a waiting time from receiving an ask signal to its reply is attached. A response signal sent back while the receive port is opened arrives at the communication terminal through the router (16), but a response signal sent back after the receive port is closed is discarded in the router (16). The CPU (28) repeatedly issues a send request to the router (16) regarding a time indicated by time information attached to the response signal lastly received as an issuance cycle (T).
摘要:
Even when only a few antigens exist in a specimen, a change in a dielectric constant and a change in an optical spectrum accompanied thereto in the periphery of a conductive member are made larger, so that sensing at high sensitivity can be performed. A structure including a protrusion including a dielectric material protruded on a substrate and a conductive member provided on a first surface of the protrusion, in which the maximum value of the cross-sectional area in the cross-section in parallel with a first surface of the conductive member is larger than the area of the first surface.
摘要:
A light source apparatus includes an optical resonator formed by an optical amplification medium and an optical switch. The optical switch includes a saturable absorber and changes its transmittance or reflectance when receiving an optical pulse emitted from a light irradiation source which includes a wavelength-tunable light source. The light source apparatus emits amplified light from the optical resonator in correspondence with the center wavelength of the optical pulse from the wavelength-tunable light source. The relationship between a length L and an effective refractive index n of the optical resonator and a repetition frequency f of the optical pulse satisfies a condition L (nL)/c.
摘要:
A light source apparatus includes a laser oscillator equipped with a first optical resonator, a plurality of second optical resonators including input portions respectively connected in parallel to the first optical resonator, a plurality of light extraction units configured to extract a light beam from an output portion of each second optical resonator, and a light multiplexing unit configured to multiplex the light beam extracted from each light extraction unit, wherein the light source apparatus causes the light multiplexing unit to output a multiplexed light beam passed through the plurality of second optical resonators, an optical member having refractive index dispersion and an optical amplification medium are disposed in each of the plurality of second optical resonators, and the optical amplification media of the plurality of second optical resonators are different from each other in maximum gain wavelength.
摘要:
The present invention provides a speaker apparatus and reproducing apparatus with no limitation on their listening areas. The apparatus includes; the housing 2 substantially in the shape of a spheroid; the left speaker 5A, which is attached to the left end of the long side of the housing 2 such that the left speaker 5A faces outwardly of the housing 2; and the right speaker 5B, which is attached to the right end of the long side of the housing 2 such that the right speaker 5B faces outwardly of the housing 2. Therefore, the left speaker 5A and the right speaker 5B are approximately equivalent to a point sound source, and the sound from the left speaker 5A and the right speaker 5B smoothly radiates from the housing 2 in every direction. Thus, a listener can have good quality of sound from anywhere around the housing.
摘要:
The present invention provides a method for designing a light transmission device, which adjusts a wavelength region of a spectrum of transmitted light without expanding a width of a transmission spectrum and without lowering the transmittance. The method for designing a light transmission device having a metal thin film, and a rectangular aperture which is formed in a plane of the metal thin film, has a long side and a short side and makes light pass therethrough, wherein the short side has a dimension smaller than a wavelength of incident light, and the long side is determined to have such a dimension that a peak wavelength at which the transmittance of light passing through the rectangular aperture is maximal can be a predetermined value.
摘要:
An optical filter includes a light-shielding conductive layer provided with a plurality of apertures on a substrate surface that selectively transmits light of a first wavelength, and a dielectric layer in contact with the conductive layer. A size of the apertures is a size equal to or less than the first wavelength, and a ratio of a surface area of the conductive layer to a surface area of the substrate surface is within a range of equal to or greater than 36% and equal to or less than 74%. A transmissivity of the first wavelength is increased by surface plasmons induced in the apertures by light falling on the conductive layer.
摘要:
An exposure mask in which exposure of an exposure object is carried out on the basis of near field light leaking from a plurality of openings provided in a light blocking member in a mutually adjoining relation, in which the spacing between adjacent openings is not greater than the wavelength of light used for the exposure, and an end portion of the opening at the exposure object side has a structure effective to reduce scatter of a surface plasmon polariton wave going around to the exposure object side of the light blocking member.