公开(公告)号：US20130156053A1

公开(公告)日：2013-06-20

申请号：US13718511

申请日：2012-12-18

Applicant: NGK INSULATORS, LTD.

Inventor： Jungo Kondo ,  Yuichi Iwata ,  Tetsuya Ejiri

IPC: H01S5/06

CPC classification number: H01S5/0604 ,  G02F1/3534 ,  G02F2201/30 ,  G02F2201/38 ,  G02F2203/13

Abstract: It is provided a device oscillating an electromagnetic wave having a target frequency of 0.1 THz to 30 THz. The device includes a main body made of a non-linear optical crystal and a sub-wavelength grating structure formed on the main body. The sub-wavelength grating structure includes protrusions arranged in first direction “X” and second direction “Y” on the main body, first grooves 3X each provided between the adjacent protrusions and extending in the first direction, and second grooves 3Y each provided between the adjacent protrusions and extending in the second direction. Each of the protrusions includes a pair of first faces opposing in the first direction “X” with each other and a pair of second faces opposing in the second direction “Y” with each other. The width of the first face is made smaller from the main body 7 toward an upper end 2c of the protrusion 2.

Abstract translation: 提供了一种振荡目标频率为0.1THz至30THz的电磁波的装置。 该装置包括由主体构成的非线性光学晶体和亚波长光栅结构的主体。 亚波长光栅结构包括在主体上沿第一方向“X”和第二方向“Y”布置的突起，每个设置在相邻突起之间并在第一方向上延伸的第一凹槽3X， 相邻的突起并沿第二方向延伸。 每个突起包括在第一方向“X”彼此相对的一对第一面和在第二方向“Y”上相对的一对第二面。 第一面的宽度从主体7朝向突起2的上端2c变小。