公开(公告)号：US20210231852A1

公开(公告)日：2021-07-29

申请号：US17231736

申请日：2021-04-15

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Nicholas A. KOTOV ,  Sharon GLOTZER ,  Brian SHAHBAZIAN ,  Ryan BRANCH ,  Lizhi XU ,  Wonjin CHOI ,  Minjeong CHA ,  Matthew SPELLINGS

IPC: G02B5/30 ,  G01S7/481 ,  G01S17/89

Abstract: Material-Sensing Light Imaging, Detection, And Ranging (LIDAR) systems optionally include a laser configured to generate a light pulse, a beam steerer configured to produce a polarization-adjusted light pulse emitted towards an object, at least one polarizer configured to polarize reflected, scattered, or emitted light returned from the object, and a processor configured to detect at least one material of the object based on an intensity and polarization of the polarized reflected, scattered or emitted light from the object. The beam steerer may include a kirigami nanocomposite. Methods are also provided, including, for example, generating a light pulse, adjusting a polarization of the light pulse to produce a polarization-adjusted light pulse emitted towards an object, polarizing reflected, scattered, or emitted light returned from the object, and detecting at least one material of the object based on an intensity and polarization of the polarized reflected, scattered or emitted light from the object.

公开(公告)号：US20200025618A1

公开(公告)日：2020-01-23

申请号：US16518230

申请日：2019-07-22

Applicant: The Regents of The University of Michigan

Inventor： Nicholas A. KOTOV ,  Theodore B. NORRIS ,  Gong CHENG ,  Wonjin CHOI

IPC: G01J5/08 ,  G01J3/28 ,  G01J3/42

Abstract: Kirigami-based optic devices are provided that include a tunable kirigami-based component comprising a plurality of bridge structures and a plurality of openings therebetween to form a grating structure. At least one surface of the kirigami-based component is micropatterned with a plasmonic material so that the grating is configured to induce or modulate rotational polarity of a beam of electromagnetic radiation as it passes through the plurality of openings. In certain aspects, the micropattern may be a gold herringbone pattern. The kirigami-based component has tunable 3D topography, which when stretched, exhibits polarization rotation angles as high as 80° and ellipticity angles as high as 34° due to the topological equivalency of helix. The kirigami-based components are compact electromagnetic modulators and can be used in THz circular dichroism (TCD) spectroscopy, for example, in a stacked configuration as a modulator, as an encryptor/decryptor for secure communication, in biomedical imaging, and LIDAR systems.