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    Stacked-waveguide polarizers with conductive oxide strips
    12.
    发明授权
    Stacked-waveguide polarizers with conductive oxide strips 有权

    公开(公告)号：US11385408B2

    公开(公告)日：2022-07-12

    申请号：US16849355

    申请日：2020-04-15

    Applicant: GLOBALFOUNDRIES U.S. Inc.

    Inventor： Yusheng Bian ,  Won Suk Lee

    IPC: G02B6/12 ,  G02B6/126 ,  G02B6/122

    Abstract: Structures for a polarizer and methods of forming a structure for a polarizer. A polarizer includes a first waveguide core and a layer that is positioned adjacent to a side surface of the first waveguide core. The layer is composed of a first material having a permittivity with an imaginary part that ranges from 0 to about 15. A second waveguide core is positioned over the first waveguide core. The second waveguide core is composed of a second material that is different in composition from the first material.

    Waveguide attenuator
    13.
    发明授权
    Waveguide attenuator 有权

    公开(公告)号：US11378747B2

    公开(公告)日：2022-07-05

    申请号：US16919867

    申请日：2020-07-02

    Applicant: GLOBALFOUNDRIES U.S. INC.

    Inventor： Yusheng Bian ,  Won Suk Lee ,  Abdelsalam A. Aboketaf

    IPC: G02B6/293 ,  G02B6/26 ,  G02B6/122 ,  G02B6/12

    Abstract: The present disclosure relates to semiconductor structures and, more particularly, to waveguide attenuators and methods of manufacture. The structure includes: a main bus waveguide structure; a first hybrid waveguide structure evanescently coupled to the main bus waveguide structure and comprising a first geometry of material; and a second hybrid waveguide structure evanescently coupled to the main bus waveguide structure and comprising a second geometry of the material.

    OPTICAL RING MODULATOR WITH PHOTONIC CRYSTAL
    14.
    发明申请
    OPTICAL RING MODULATOR WITH PHOTONIC CRYSTAL 有权

    公开(公告)号：US20220187676A1

    公开(公告)日：2022-06-16

    申请号：US17119042

    申请日：2020-12-11

    Applicant: GLOBALFOUNDRIES U.S. INC.

    Inventor： Michal Rakowski ,  Yusheng Bian ,  Won Suk Lee ,  Roderick A. Augur

    IPC: G02F1/225

    Abstract: Embodiments of the disclosure provide an optical ring modulator. The optical ring modulator includes waveguide with a first semiconductor material of a first doping type, and a second semiconductor material having a second doping type adjacent the first semiconductor material. A P-N junction is between the first semiconductor material and the second semiconductor material. A plurality of photonic crystal layers, each embedded within the first semiconductor material or the second semiconductor material, has an upper surface that is substantially coplanar with an upper surface of the waveguide structure.

    Optical device with low-loss thermally tunable closed-curve optical waveguide
    18.
    发明授权
    Optical device with low-loss thermally tunable closed-curve optical waveguide 有权

    公开(公告)号：US11555964B1

    公开(公告)日：2023-01-17

    申请号：US17363846

    申请日：2021-06-30

    Applicant: GLOBALFOUNDRIES U.S. Inc.

    Inventor： Michal Rakowski ,  Petar I. Todorov ,  Yusheng Bian ,  Won Suk Lee ,  Asif J. Chowdhury ,  Kenneth J. Giewont

    IPC: G02B6/125 ,  G02F1/01 ,  G02B6/136 ,  G02B6/12

    Abstract: Disclosed is a photonic structure and associated method. The structure includes a closed-curve waveguide having a first height, as measured from the top surface of an insulator layer, and an outer curved sidewall that extends essentially vertically the full first height (e.g., to minimize signal loss). The structure includes a closed-curve thermal coupler and a heating element. The closed-curve thermal coupler is thermally coupled to and laterally surrounded by the closed-curve waveguide and has a second height that is less than the first height. In some embodiments, the closed-curve waveguide and the closed-curve thermal coupler are continuous portions of the same semiconductor layer having different thicknesses. The heating element is thermally coupled to the closed-curve thermal coupler and thereby indirectly thermally coupled to the closed-curve waveguide. Thus, the heating element is usable for thermally tuning the closed-curve waveguide via the closed-curve thermal coupler to minimize any temperature-dependent resonance shift (TDRS).

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