公开(公告)号：US11221506B2

公开(公告)日：2022-01-11

申请号：US16799100

申请日：2020-02-24

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Steven M. Shank ,  Yusheng Bian ,  Ajey Poovannummoottil Jacob

IPC: G02F1/01 ,  G02F1/035

Abstract: Structures for a polarization switch and methods of fabricating a structure for a polarization switch. A waveguide core is located on a substrate. The waveguide core is composed of silicon nitride. An active layer is positioned proximate to a section of the waveguide core. The active layer composed of a phase change material having a first state with a first refractive index and a second state with a second refractive index.

公开(公告)号：US20210294035A1

公开(公告)日：2021-09-23

申请号：US16821299

申请日：2020-03-17

Applicant: GLOBALFOUNDRIES U.S. Inc. ,  KHALIFA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yusheng Bian ,  Ajey Poovannummoottil Jacob ,  Sujith Chandran

IPC: G02B6/122

Abstract: Structures for an optical coupler and methods of fabricating a structure for an optical coupler. A first waveguide core has a first tapered section and a second waveguide core has a second tapered section positioned adjacent to the first tapered section. The first tapered section has a first shape determined by a first non-linear function, and the second tapered section has a second shape determined by a second non-linear function.

公开(公告)号：US11125944B2

公开(公告)日：2021-09-21

申请号：US16741792

申请日：2020-01-14

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Yusheng Bian ,  Ajey Poovannummoottil Jacob

IPC: G02B6/126 ,  G02B6/13 ,  G02B6/125 ,  G02B6/12

Abstract: Disclosed are embodiments of an on-chip polarizer and of methods of forming the polarizer. The polarizer includes first and second waveguides with different shapes at different design levels above a substrate. The first waveguide has a main body between an input end and an output end. The second waveguide is spiral in shape with an inner end and with an outer end that is evanescently coupled to the main body of the first waveguide. Light signals, including first light signals with a first type polarization and second light signals with a second type polarity, are received at the input end of the first waveguide. The first waveguide passes the first light signals to the output end and passes at least some second light signals out the main body and into the outer end of the second waveguide. The second waveguide attenuates the received second light signals.

公开(公告)号：US20210257811A1

公开(公告)日：2021-08-19

申请号：US16794330

申请日：2020-02-19

Applicant: GLOBALFOUNDRIES U.S. INC. ,  KHALIFA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Ajey Poovannummoottil Jacob ,  Solomon M. Serunjogi ,  Mihai Adrian Tiberiu Sanduleanu

IPC: H01S5/042 ,  H03K7/02

Abstract: A driver circuit includes digital inputs, such as a first digital input and a second digital input. The digital inputs receive voltages at either a digital high-voltage or a digital low-voltage. The driver circuit has a clock input, an analog output, a first differential pair of transistors connected to the analog output, second differential pairs of transistors connected to the analog output, and voltage limiters connected to the clock input and the second differential pairs of transistors. The voltage limiters supply different voltages to the second differential pairs of transistors, which results in the second differential pairs of transistors providing analog signals to the analog output that are at different voltage steps at, and between, the digital high-voltage and the digital low-voltage.

公开(公告)号：US11092872B1

公开(公告)日：2021-08-17

申请号：US16819971

申请日：2020-03-16

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Yusheng Bian ,  Ajey Poovannummoottil Jacob

IPC: G02F1/29 ,  G02B6/12 ,  G02B6/122

Abstract: Structures including an optical phased array and methods of fabricating such structures. A first optical phased array includes a first plurality of antennas. A plurality of phase shifters are respectively coupled to the first plurality of antennas. A second optical phased array includes a second plurality of antennas, and a third optical phased array includes a third plurality of antennas. The second optical phased array is located in a first direction relative to the first optical phased array. The third optical phased array is located in a second direction relative to the first optical phased array. The second direction is different from the first direction.

公开(公告)号：US11069402B1

公开(公告)日：2021-07-20

申请号：US16820801

申请日：2020-03-17

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Akhilesh Jaiswal ,  Ajey Poovannummoottil Jacob

IPC: G11C11/42 ,  G06F17/16 ,  G11C11/22 ,  G11C16/24 ,  G11C16/04 ,  G11C16/08 ,  G11C16/10 ,  G11C16/26

Abstract: Disclosed is a cell that integrates a pixel and a three-terminal non-volatile memory device. The cell can be selectively operated in write, read and functional computing modes. In the write mode, a first data value is stored in the memory device. In the read mode, it is read from the memory device. In the functional computing mode, the pixel captures a second data value and a sensed change in an electrical parameter (e.g., voltage or current) on a bitline connected to the cell is a function of both the first and second data value. Also disclosed is an IC structure that includes an array of the cells and, when multiple cells in a given column are concurrently operated in the functional computing mode, the sensed total change in the electrical parameter on the bitline for the column is indicative of a result of a dot product computation.

公开(公告)号：US20210217916A1

公开(公告)日：2021-07-15

申请号：US16740664

申请日：2020-01-13

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Ajey Poovannummoottil Jacob ,  Yusheng Bian ,  Steven Shank

IPC: H01L31/103 ,  G02B6/13 ,  G02B6/12 ,  H01L31/0392

Abstract: One illustrative photodetector disclosed herein includes an N-doped waveguide structure defined in a semiconductor material, the N-doped waveguide structure comprising a plurality of first fins, and a detector structure positioned on the N-doped waveguide structure, wherein a portion of the detector structure is positioned laterally between the plurality of first fins. In this example, the photodetector also includes at least one N-doped contact region positioned in the semiconductor material and a P-doped contact region positioned in the detector structure.

公开(公告)号：US20210217912A1

公开(公告)日：2021-07-15

申请号：US16740719

申请日：2020-01-13

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Ajey Poovannummoottil Jacob ,  Yusheng Bian ,  Steven Shank

IPC: H01L31/0352 ,  H01L31/0232 ,  H01L31/103 ,  H01L31/028 ,  H01L31/18

Abstract: A photodetector disclosed herein includes an N-doped waveguide structure defined in a semiconductor material, wherein the N-doped waveguide structure comprises a plurality of first fins. Each adjacent pair of the plurality of first fins is separated by a trench formed in the semiconductor material. The photodetector also includes a detector structure positioned on the N-doped waveguide structure, wherein a portion of the detector structure is positioned laterally between the plurality of first fins. The detector structure comprises a single crystal semiconductor material. The photodetector also includes a first diffusion region that extends from the bottom surface of the trench into the semiconductor material, wherein the first diffusion region comprises atoms of the single crystal semiconductor material of the detector structure.

公开(公告)号：US20210191162A1

公开(公告)日：2021-06-24

申请号：US16718561

申请日：2019-12-18

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Yusheng Bian ,  Ajey Poovannummoottil Jacob

IPC: G02F1/01

Abstract: One optical antenna coupler includes a base body having a first waveguide and a second waveguide and a plurality of antenna coupler elements positioned above an upper surface of the base body that are adapted to be irradiated by an incident light. The plurality of antenna coupler elements includes at least one variable optical characteristics (VOC) antenna coupler element that comprises a VOC material, wherein the at least one VOC antenna coupler element is operatively coupled to a first energy source. The VOC antenna coupler element is adapted to be transitioned from a metallic state to an insulator state and vice versa. In the metallic state, substantially all of the incident light is directed out of the optical antenna coupler via the first waveguide and, in the insulator state, substantially all of the incident light is directed out of the optical antenna coupler via the second waveguide.

公开(公告)号：US20210191042A1

公开(公告)日：2021-06-24

申请号：US17170959

申请日：2021-02-09

Applicant: GLOBALFOUNDRIES U.S. Inc.

Inventor： Bo Peng ,  Ajey Poovannummoottil Jacob ,  Yusheng Bian

IPC: G02B6/26

Abstract: Optical coupler structures include a waveguide having waveguide metamaterial segments aligned along a first line. A second insulator is on the first insulator and the waveguide metamaterial segments. A coupler structure is in the second insulator and has coupler metamaterial segments aligned along a second line. The first line and the second line are parallel and within a plane. A portion of the waveguide overlaps a portion of the coupler structure. The waveguide metamaterial segments intersect the plane and have first widths perpendicular to the plane, and the first widths have a first taper along the first line. The coupler metamaterial segments intersect the plane and have second widths in the direction perpendicular to the plane. The second widths have a second taper along the second line that is different from the first taper of the first widths where the waveguide overlaps the coupler structure.