TERAHERTZ WAVE GENERATION ELEMENT, TERAHERTZ WAVE DETECTION ELEMENT, AND TERAHERTZ TIME DOMAIN SPECTRAL INSTRUMENT

PROBLEM TO BE SOLVED: To provide a generation element or the like which is capable of efficiently generating a terahertz wave with a relatively high intensity or a terahertz wave with a relatively narrow pulse width by optical excitation.SOLUTION: A terahertz wave generation element includes: an opt...

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Bibliographische Detailangaben
1. Verfasser:	ONOUCHI TOSHIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a generation element or the like which is capable of efficiently generating a terahertz wave with a relatively high intensity or a terahertz wave with a relatively narrow pulse width by optical excitation.SOLUTION: A terahertz wave generation element includes: an optical waveguide including a core part 4 made of electro-optic crystal; an optical coupling member 7 which takes out a terahertz wave generated from the optical waveguide due to light propagation in the optical waveguide, into a space; and a reflecting layer 6 or a reflecting surface which reflects the terahertz wave. The reflecting layer 6 or the reflecting surface is provided in a position on the side opposite to the optical coupling member 7 with the core part 4 therebetween. The reflecting surface is provided in a position spaced from the core part 4 by such a distance that an amplitude of light propagated in the optical waveguide is sufficiently reduced. An incidence angle of the terahertz wave on an emission surface of the optical coupling member 7 may be set so as to meet the Brewster condition. By the same configuration and the opposite process, the terahertz wave generation element is used as a terahertz wave detection element for detecting a terahertz wave.