公开(公告)号：US20020118456A1

公开(公告)日：2002-08-29

申请号：US10017932

申请日：2001-12-18

Applicant: TECHNION RESEARCH AND DEVELOPMENT FOUNDATION LTD.

Inventor： Erez Hasman ,  Zeev Bomzon ,  Vladimir Kleiner

IPC: G02B005/30

CPC classification number: G21K1/16 ,  B23K26/064 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0665 ,  G02B5/1809 ,  G02B5/1866 ,  G02B5/3058

Abstract: An optical device includes a plurality of metallic stripes, arranged in a substantially planar, subwavelength grating having a laterally varying, continuous grating vector, deposited on a substrate such as GaAs or ZnSe. When used as a polarizer, the device passes a laterally uniform polarized beam of electromagnetic radiation incident thereon with a predetermined, laterally varying transmissivity. When used to effect polarization state transformation, the device transforms a beam of electromagnetic radiation incident thereon into a transmitted beam having a predetermined, laterally varying polarization state. The device can be used to provide radially polarized electromagnetic radiation for accelerating subatomic particles or for cutting a workpiece. The device also can be used, in conjunction with a mechanism for measuring the lateral variation of the intensity of the transmitted beam, for measuring the polarization state of the incident beam.

Abstract translation: 光学装置包括多个金属条，布置在具有横向变化的连续光栅矢量的基本上平面的亚波长光栅中，沉积在诸如GaAs或ZnSe的衬底上。 当用作偏振器时，器件以预定的横向变化的透射率通过入射在其上的横向均匀的电磁辐射的偏振光束。 当用于实现偏振态变换时，该装置将入射到其上的电磁辐射束变换成具有预定的横向变化的偏振状态的透射光束。 该装置可用于提供用于加速亚原子粒子或切割工件的径向极化电磁辐射。 该装置还可以与用于测量透射光束的强度的横向变化的机构结合使用，以测量入射光束的偏振状态。