公开(公告)号：US09382387B2

公开(公告)日：2016-07-05

申请号：US13800646

申请日：2013-03-13

申请人： California Institute of Technology ,  The University of Massachusetts

发明人： Yan Xia ,  Benjamin R Sveinbjornsson ,  Robert H Grubbs ,  Raymond Weitekamp ,  Garret M Miyake ,  Harry A Atwater ,  Victoria Piunova ,  Christopher Scot Daeffler ,  Sung Woo Hong ,  Weiyin Gu ,  Thomas P. Russell

IPC分类号： C08G81/02 ,  C08G83/00

CPC分类号： C08G81/027 ,  C08G83/008

摘要： The invention provides a class of copolymers having useful properties, including brush block copolymers, wedge-type block copolymers and hybrid wedge and polymer block copolymers. In an embodiment, for example, block copolymers of the invention incorporate chemically different blocks comprising polymer size chain groups and/or wedge groups that significantly inhibit chain entanglement, thereby enhancing molecular self-assembly processes for generating a range of supramolecular structures, such as periodic nanostructures and microstructures. The present invention also provides useful methods of making and using copolymers, including block copolymers.

摘要翻译： 本发明提供一类具有有用性质的共聚物，包括刷嵌嵌段共聚物，楔型嵌段共聚物和混合楔形和聚合物嵌段共聚物。 在一个实施方案中，例如，本发明的嵌段共聚物包含化学上不同的嵌段，其包含显着抑制链缠结的聚合物尺寸链基团和/或楔形基团，从而增强分子自组装方法以产生一系列超分子结构，例如周期性 纳米结构和微结构。 本发明还提供制备和使用包括嵌段共聚物的共聚物的有用方法。

公开(公告)号：US11662504B2

公开(公告)日：2023-05-30

申请号：US16740322

申请日：2020-01-10

申请人： California Institute of Technology

发明人： Yonghwi Kim ,  Pin Chieh Wu ,  Ruzan Sokhoyan ,  Kelly W Mauser ,  Rebecca D Glaudell ,  Ghazaleh Kafaie Shirmanesh ,  Harry A Atwater

IPC分类号： G02B1/00 ,  G02F1/01 ,  G02B26/06

CPC分类号： G02B1/002 ,  G02B26/06 ,  G02F1/0147 ,  G02F2202/30 ,  H10N70/231 ,  H10N70/8613 ,  H10N70/8828 ,  H10N70/8833

摘要： Electrically tunable metasurfaces including an array of subwavelength metasurface unit elements are presented. The unit elements include a stacked metal-insulator-metal structure within which an active phase change layer is included. A purely insulator, metal, or coexisting metal-insulator phase of the active layer can be electrically controlled to tune an amplitude and phase response of the metasurfaces. In combination with the subwavelengths dimensions of the unit elements, the phase and amplitude response can be controlled in a range from optical wavelengths to millimeter wavelength of incident light. Electrical control of the unit elements can be provided via resistive heating produced by flow of current though a top metal layer of the unit elements. Alternatively, electrical control of the unit elements can be provided via electrical field effect produced by applying a voltage differential between the top and bottom metal layers of the unit elements.

公开(公告)号：US10509297B2

公开(公告)日：2019-12-17

申请号：US15881689

申请日：2018-01-26

申请人： California Institute of Technology

发明人： Ghazaleh Kafaie Shirmanesh ,  Ruzan Sokhoyan ,  Harry A Atwater

IPC分类号： G02F1/29 ,  H01Q3/44

摘要： An array of unit cells allows beam steering of an incident electromagnetic wave. Each unit cell has a back reflector, a conductive oxide between gate dielectrics, and an antenna. Voltage bias applied to different layers enables the accumulation or depletion of charges at the top and bottom interfaces of the conductive oxide. The charge accumulation and depletion regions control the refractive index of the material, enabling control of the reflected electromagnetic wave.