电磁THz波产生器件、电磁THz波检测器件和时域分光装置

Electromagnetic THz wave generating device, electromagnetic THz wave detecting device, and time -domain spectroscopy apparatus

Abstract

An electromagnetic wave generating device is provided which includes an optical waveguide including a plurality of waveguide segments (101,104,107) such that the main lobe (111) of a combined electromagnetic wave has a substantially single large directivity. The electromagnetic wave generating device includes the -optical waveguide -including a plurality of waveguide segments (101,104,107) each of which is sandwiched between dielectrics (10,11) includes a nonlinear optical crystal- The waveguide segments are arranged such that an angle (2theta[c]) formed by the directions of propagation of light in two adjacent, waveguide segments (101,104,107) substantially corresponds to 2theta[c]- When n[g] denotes the refractive index of the nonlinear optical crystal for light and epsilon[eff] denotes the effective relative permittivity of an assembly of the dielectrics (10,11) and the waveguide segments (101,104,107); for an electromagnetic wave, theta[c] is defined as theta[c] =cos<-1> (n[g]/[square root] epsilon[eff]).
提供一种电磁波产生器件,该电磁波产生器件包括包含多个波导区段(101、104、107)的光学波导,使得合成的电磁波的主瓣(111)具有大致单一的大方向性。电磁波产生器件包括包含分别被夹在电介质(10、11)之间并包含非线性光学晶体的多个波导区段(101、104、107)的光学波导。波导区段被布置成使得由两个相邻的波导区段(101、104、107)中的光的传播方向形成的角度(2θc)基本上与2θc对应。当ng表示非线性光学晶体对于光的折射率,且εeff表示电介质(10、11)和波导区段(101、104、107)的组件对于电磁波的有效相对介电常数时,θc被定义为θc=cos-1(ng/√εeff)。

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    WO-2006062073-A1June 15, 2006Rikenテラヘルツ波発生方法及び装置

NO-Patent Citations (3)

    Title
    ANDREI G.等: "Efficient generation of subpicosecond terahertz radiation by phase-matched optical rectification using ultrashort laser pulses with tilted pulse fronts", 《APPLIED PHYSICS LETTERS》, vol. 83, no. 15, 13 October 2003 (2003-10-13), XP012035356, DOI: doi:10.1063/1.1617371
    C .WEISS等: "Generation of tunable narrow-band surface-emitted terahertz radiation in periodically poled lithium niobate", 《OPTICS LETTERS》, vol. 26, no. 8, 15 April 2001 (2001-04-15), XP001077218
    KOJI SUIZU等: "Extremely frequency-widened terahertz wave generation using Cherenkov-type radiation", 《OPTICS EXPRESS》, vol. 17, no. 8, 13 April 2009 (2009-04-13), XP031563263

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