公开(公告)号：US20210262922A1

公开(公告)日：2021-08-26

申请号：US17054170

申请日：2020-05-15

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Honggang GU ,  Baokun SONG ,  Shiyuan LIU ,  Zhengfeng GUO ,  Mingsheng FANG ,  Hao JIANG ,  Xiuguo CHEN

IPC: G01N21/21 ,  G06F17/16

Abstract: The disclosure relates to a method for measuring a dielectric tensor of a material. Firstly, a partial conversion matrix Tp and a transmission matrix Tt are determined by a predetermined initial value ε(E) of the dielectric tensor of the material to be measured, thereby obtaining a transfer matrix of an electromagnetic wave on a surface of the material to be measured by the partial conversion matrix Tp, the transmission matrix Tt, and an incident matrix Ti. Then, a theoretical Mueller matrix spectrum MMCal(E) of the material to be measured is determined by the transfer matrix Tm. A fitting analysis is performed on the theoretical Mueller matrix spectrum MMCal(E) and a measured Mueller matrix spectrum MMExp(E) of the material to be measured to obtain the dielectric tensor of the material to be measured. The obtained result is comprehensive and reliable, which is suitable for solving dielectric tensors of various materials.

公开(公告)号：US20190369006A1

公开(公告)日：2019-12-05

申请号：US16126230

申请日：2018-09-10

Applicant: Huazhong University of Science and Technology

Inventor： Hao JIANG ,  Jiamin LIU ,  Shiyuan LIU ,  Song ZHANG ,  Zhicheng ZHONG ,  Xiuguo CHEN ,  Honggang GU

IPC: G01N21/21 ,  G02B5/30

Abstract: The present invention discloses a high temporal resolution Mueller matrix elliptical polarization measuring device and method. In the incident light path, four polarization modulation channels are used to split and modulate a pulse laser beam into four polarized beams in independent polarization states. Due to different light path differences, the pulse beams have a time interval of several nanoseconds, and thus four pulse laser beams are successively irradiated on the surface of the sample. In the reflected light path, six channel polarization detection modules are used to synchronously measure the Stokes vectors of the reflected beams on the sample surface. By using known incident and reflected Stokes vectors of the four pulse beams, linear equations can be solved to obtain the Mueller matrix of the sample.