公开(公告)号：US20190079321A1

公开(公告)日：2019-03-14

申请号：US16124948

申请日：2018-09-07

Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Pin Chieh WU ,  Ruzan SOKHOYAN ,  Ghazaleh KAFAIE SHIRMANESH ,  Harry A. ATWATER

IPC: G02F1/01 ,  G02F1/055

CPC classification number: G02F1/0136 ,  G02F1/0147 ,  G02F1/0551 ,  G02F1/0555 ,  G02F2202/101 ,  G02F2202/102 ,  G02F2202/30

Abstract: The optical response of a metasurface is controlled by actuating it via an electrical or magnetic field, temperature control, optical pumping or electromechanical actuation. The metasurface will therefore control the polarization of the incident light. The metasurface comprises an array of patch antennas. The patch antennas are in the form of asymmetrical elements, including rotated rods, cross-shapes, V-shapes, and L-shapes.

公开(公告)号：US20190131491A1

公开(公告)日：2019-05-02

申请号：US16175113

申请日：2018-10-30

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Duhyun LEE ,  Ruzan SOKHOYAN ,  Yu-Jung LU ,  Ghazaleh KAFAIE SHIRMANESH ,  Harry A. ATWATER ,  Ragip A. PALA ,  Chan-Wook BAIK

IPC: H01L33/06 ,  H01L33/10 ,  H01L33/60

Abstract: Provided are light emission devices including an output coupler and optical apparatuses having the same. The light emission device may include a QD layer containing quantum dots and a nano-antenna structure including an output coupler configured to control an output characteristic of light emitted from the QD layer. The output coupler may be configured to output an emission wavelength of the QD layer. The nano-antenna structure may include one of a metallic antenna, a dielectric antenna, and a slit-containing structure, or may have a multi-patch antenna structure or a fishbone antenna structure.

公开(公告)号：US20200280174A1

公开(公告)日：2020-09-03

申请号：US16804442

申请日：2020-02-28

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Duhyun LEE ,  Muhammad ALAM ,  Ghazaleh KAFAIE SHIRMANESH ,  Harry ATWATER ,  Pin Chieh WU ,  Ragip PALA

IPC: H01S5/187 ,  H01S5/183 ,  H01S5/22

Abstract: A light modulation element according to example embodiments includes a substrate; a first lower DBR layer on the substrate including a first material layer alternately stacked with a second material layer having a different refractive index from the first material layer; a second lower DBR layer on the first lower DBR layer with a surface area less than the first lower DBR layer and including a third material layer alternately stacked with a fourth material layer having a different refractive index from the third material layer; an active layer on the second lower DBR layer, including a semiconductor material having a multi-quantum well structure and having a refractive index that varies according to an applied voltage; and an upper DBR layer on the active layer including a fifth material layer alternately stacked with a sixth material layer having a different refractive index from the fifth material layer.

公开(公告)号：US20190129206A1

公开(公告)日：2019-05-02

申请号：US16170573

申请日：2018-10-25

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  CALIFORNIA INSTITUTE OF TECHNOLOGY

Inventor： Duhyun LEE ,  Ruzan SOKHOYAN ,  Yu-Jung LU ,  Ghazaleh KAFAIE SHIRMANESH ,  Harry ATWATER ,  Ragip PALA ,  Chanwook BAIK

IPC: G02F1/017 ,  B82Y20/00

Abstract: An optical modulating device may include a plurality of quantum dot (QD)-containing layers having QDs and a plurality of refractive index change layers. The QD-containing layers may be disposed between the refractive index change layers, respectively. The optical modulating device may be configured to modulate light-emission characteristics of the plurality of QD-containing layers. At least two of the QD-containing layers may have different central emission wavelengths. At least two of the plurality of refractive index change layers may include different materials or have different carrier densities.

公开(公告)号：US20190033682A1

公开(公告)日：2019-01-31

申请号：US15881689

申请日：2018-01-26

Applicant: California Institute of Technology

Inventor： Ghazaleh KAFAIE SHIRMANESH ,  Ruzan SOKHOYAN ,  Harry A ATWATER

IPC: G02F1/29

CPC classification number: G02F1/292 ,  G02F1/29 ,  H01Q3/44

Abstract: 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.