Abstract: An electromagnetic-wave oscillator includes a substrate, an EMW oscillating unit including a gain portion, an EMW resonance portion, an EMW radiating portion, and a ground (GND) portion, and a supplying unit for supplying electric power to the EMW oscillating unit. The ground portion regulates a predetermined reference electric potential for the gain portion, the EMW resonance portion, and the EMW radiating portion. The EMW oscillating unit is disposed on a first surface of the substrate. The supplying unit is disposed on a second surface of the substrate extending on an opposite side to the first surface. The EMW oscillating unit and the supplying unit are electrically connected via a penetrating electrode formed in the substrate.

Abstract: A method of identification of a living body is provided. The method comprises steps of detecting an electromagnetic wave in a frequency band ranging from 300 GHz to 30 THz transmitted from the living body, extracting plural kinds of information from the detected electromagnetic wave, and deriving therefrom information on the living body and information inherent to the living body, and comparing the information on the living body and the information inherent to the living body with preliminarily memorized information. This method identifies an individual living body with improved real-time detectableness and higher security to prevent illegal pretension.

Abstract: An inspection apparatus includes a terahertz wave detection portion, a waveform shaping portion configured to shape a first answer signal with respect to a terahertz wave by using a signal acquired in the above-described terahertz wave detection portion, a measurement condition acquisition portion configured to acquire a first measurement condition, an answer signal storage portion configured to store second answer signals corresponding to measurement conditions, a selection portion configured to select the above-described second answer signal from the above-described answer signal storage portion, and a signal processing portion configured to conduct deconvolution with respect to the above-described first answer signal on the basis of the above-described second answer signal.

Abstract: A measuring apparatus measures a time-domain waveform of THz wave pulse by time-domain spectroscopy. The apparatus includes a detector for detecting THz wave pulse containing a signal component at frequency fs, a small signal detector for detecting the signal component at frequency fs of a signal supplied from the detecting portion, with a time constant ?, and an integrator. The integrator is connected to an output stage of the small signal detector to integrate signals supplied from the small signal detector, and has a time constant below the time constant ? and over 1/(2fs).

Abstract: An antenna oscillator includes a first strip line type resonator and a second resonator functioning as an antenna. The first resonator is fabricated by stacking a first conductor onto a grounding conductor with a first dielectric part including a gain part therebetween. The second resonator is fabricated by stacking a second conductor, emitting electromagnetic waves to the exterior, onto the first resonator with a second dielectric part therebetween so as to function as an antenna with the configuration between the grounding conductor and the second conductor. The first conductor and the second conductor are separated from each other in a stacking direction with the second dielectric part or the second dielectric part and the grounding conductor therebetween. The first resonator and the second resonator are electromagnetically connected together so as to form a resonance circuit that makes the electromagnetic waves resonate.

Abstract: An antenna device for operating in a predetermined frequency band has a resonator section, a semiconductor section and an antenna section. The resonator section includes a first conductor section, a dielectric section, and a second conductor section for specifying a reference potential against each section which is arranged so as to oppose the first conductor section through the dielectric section. A semiconductor section is arranged so as to be sandwiched between the first conductor section and the second conductor section. The antenna section uses the second conductor section as a grounding conductor, is substantially spherical, makes at least its surface electroconductive, and is arranged on the first conductor section.

Abstract: To provide an apparatus capable obtaining a temporal waveform of terahertz waves transmitted through or reflected by a sample in a set region. A delay unit is configured to change a timing at which the detection unit detects terahertz waves transmitted through or reflected by a sample, which is originated from terahertz waves generated by a generation unit. A waveform obtaining unit is configured to obtain a temporal waveform of the transmitted terahertz waves which are obtained by using the delay unit. The delay unit, of which more than one may be used, is controlled so that the detection unit detects the transmitted terahertz waves in an area related to the temporal waveform set on the basis of information related to the sample that is pre-stored in the storage unit. Then, a temporal waveform of the transmitted terahertz waves in the area is obtained.

Abstract: A method for acquiring an accurate time waveform of terahertz waves includes: acquiring a first time waveform by using a first delay portion with a first difference in length of the optical paths in the second delay portion, using a second delay portion to change the first difference in length of the optical paths to a second difference in length of the optical paths that is different from the first difference in length of the optical paths, acquiring a second time waveform by using the first delay portion with the second difference in length of the optical paths, adjusting the acquired first and second time waveforms in accordance with a predetermined differences in length of the optical paths based on the first and second differences in length of the optical paths, and averaging the first and second time waveforms according to the predetermined difference in length of the optical paths.

Abstract: An apparatus for measuring a terahertz wave includes a dispersing section 103 for chirping the terahertz wave 104 generated from a generating section 101. A detecting section 102 detects waveform information on the terahertz wave chirped by the dispersing section 103. As a result, it is possible to acquire frequency information included in the waveform information. Therefore, it is possible to acquire spectral information including amplitude information of each frequency component and intensity information on each frequency or wavelength from the time waveform without Fourier-transforming the time waveform.

Abstract: Provided are an apparatus and a method which enable acquisition of a temporal waveform of a propagating terahertz wave by changing a propagation velocity of the terahertz wave. A waveform information acquisition apparatus includes a generation portion for generating a terahertz wave, a propagation portion for allowing the terahertz wave generated by the generation portion to propagate therethrough, a detection portion for detecting waveform information of the terahertz wave, a first delay portion for changing a propagation velocity of the terahertz wave, and a control portion for controlling the first delay portion to change the propagation velocity of the terahertz wave in the propagation portion, and acquires information regarding the temporal waveform of the terahertz wave detected by the detection portion.

Abstract: An apparatus for acquiring information on a time waveform of a terahertz wave is comprised of a terahertz wave-generating unit, a waveform information-detecting unit, and a delay unit for changing the time after the terahertz wave is generated in the generating unit until it is detected as waveform information of the terahertz wave in the detecting unit, wherein the delay unit is configured so as to change a propagating distance of the terahertz wave generated by the generating unit, and associates waveform information of the terahertz wave, which is detected in the detecting unit, and the propagating distance every terahertz wave generated by the generating unit.

Abstract: The invention is to provide an inspection apparatus causing interactions of plural times between an object and an electromagnetic wave, thereby enabling inspection with a satisfactory sensitivity even for an object of a trace amount. The inspection apparatus detects information from an object 112 based on a change in an electromagnetic wave transmission state caused by plural times of interactions between the electromagnetic wave and the object 112.

Abstract: A measuring apparatus measures a time-domain waveform of THz wave pulse by time-domain spectroscopy. The apparatus includes a detector for detecting THz wave pulse containing a signal component at frequency fs, a small signal detector for detecting the signal component at frequency fs of a signal supplied from the detecting portion, with a time constant ?, and an integrator. The integrator is connected to an output stage of the small signal detector to integrate signals supplied from the small signal detector, and has a time constant below the time constant ? and over 1/(2fs).

Abstract: An object information acquisition apparatus for acquiring information on the inside of an object includes an electromagnetic wave generation unit capable of outputting a terahertz wave and of changing the output intensity, an irradiation unit that irradiates an electromagnetic wave onto an object, a scanning unit and a detection unit that detects the electromagnetic wave irradiated onto the object. The scanning unit changes the relative positions of the irradiated electromagnetic wave and the object. The detection unit detects the electromagnetic wave transmitted through or reflected by the object as a result of interaction of the object and the electromagnetic wave.

Abstract: A waveguide includes a single line formed by a conductive material for propagating an electromagnetic wave including at least a part of a frequency band of 30 GHz or more and 30 THz or less, a first dielectric member covering the single line, and a second dielectric member covering the single line. A gap is provided between the first dielectric member and the second dielectric member. The electromagnetic wave which propagates from the single line covered by the first dielectric member to the single line covered by the second dielectric member, when propagating through the single line at the gap, is interactable with a specimen to be disposed at the gap.

Abstract: A detecting apparatus for detecting information of a liquid object or sample includes a transmission path, a THz wave supplying unit, a THz wave detecting unit, and an infiltrative holding member for infiltration and holding of a liquid object. The supplying unit supplies an electromagnetic wave in a frequency range between 30 GHz and 30 THz to the transmission path. The detecting unit detects the THz wave transmitted through the transmission path. The infiltrative holding member is set at a location containing at least a portion in which an electric field distribution of the THz wave propagating along the transmission path extends.

Abstract: The present invention provides an optical semiconductor device including a semiconductor thin film (4) having photoconductivity and a pair of electrodes (5) and (10) for applying an electric field to an inside of the semiconductor thin film (4) in a direction approximately vertical to a surface of the semiconductor thin film (4), wherein the semiconductor thin film (4) generates an electromagnetic wave when light is applied to a region thereof to which the electric field is applied. The electrodes are provided to a front surface and a back surface of the semiconductor thin film (4) with the semiconductor thin film interposed therebetween.

Abstract: A sensor is provided which comprises a waveguide for allowing an electromagnetic wave to propagate therethrough and disposing an object at a plurality of positions thereof, and a detecting portion for detecting the electromagnetic wave which has interacted with the object at the plurality of positions and propagated through the waveguide, wherein a property of the object is analyzed or identified based on an information obtained from the electromagnetic wave detected by the detecting portion. Thereby, accurate detection can be effected even when the amount of an object is small.

Abstract: An image forming apparatus includes an electromagnetic wave radiating portion, an electromagnetic wave detecting portion, a driving portion, a periodical signal generating portion for generating plural periodical signals, a memory portion, a processing portion, and an image forming portion. The driving portion changes the relative positional relationship between an object and the radiating portion. The detecting portion acquires transmitted or reflected wave from the object, as a time-series detection signal. The processing portion executes a process of multiplying the detection signals of the areas of the object with the periodical signals, and a process of adding the multiplied results and causing the memory portion to store the added results.

Abstract: Provided is a terahertz wave optical device that can be used as a terahertz wave generating device including: an optical switch portion for generating a carrier abruptly by irradiation with excitation light; and a first electrode portion and a second electrode portion that are disposed so as to be opposed to each other with the optical switch portion therebetween so as to apply an electric field in a thickness direction of the optical switch portion. The first electrode portion includes, at least in part, an antenna portion having an antenna function of distributing the carrier generated by the irradiation with the excitation light in a direction crossing an application direction of the electric field. With the terahertz wave optical device, a step for adjusting the incident angle of the excitation light is simplified.