Abstract: Structures for a photonics chip that include a photodetector and methods of forming such structures. The structure comprises a photodetector that is disposed on a substrate and that includes a light-absorbing layer. The light-absorbing layer includes a sidewall and a notch in the sidewall. The structure further comprises a waveguide core including a section adjacent to the notch in the sidewall of the light-absorbing layer.

Abstract: Provided is a device, device for analyte detection, comprising: a first waveguide; a sensor ring resonator, optically coupled to the first waveguide, wherein the sensor ring resonator is sensitive to an analyte; multiple filter ring resonators optically coupled to the sensor ring resonator, one or more detectors, wherein each of the multiple filter ring resonators is optically coupled to at least one of the one or more detectors; and at least a first microfluidic channel, wherein the first microfluidic channel configured to fluidically deliver an analyte to the sensor ring resonator.

Abstract: Provided is a device, including: an analog optical interconnect; an input array coupled to the analog optical interconnect; and an analog or mixed signal processor or a memory array coupled to the input array via the analog optical interconnect.

Abstract: Structures for a broadband optical switch and methods of forming such structures. The structure comprises a Mach-Zehnder interferometer including first and second arms. The first arm comprises a first waveguide core, and the second arm comprises a second waveguide core. The structure further comprises a ring resonator comprising a third waveguide core that has a first thickness. A portion of the third waveguide core is adjacent to a portion of the first waveguide core over a light coupling region. A slab layer connects the portion of the first waveguide core to the portion of the third waveguide core. The slab layer has a second thickness that is less than the first thickness of the first waveguide core.

Abstract: Structures for a thermo-optic phase shifter and methods of forming a thermo-optic phase shifter. The structure comprises an interconnect structure including a dielectric layer, a waveguide core on the dielectric layer, and a heater on the dielectric layer. The heater includes a resistive heating element positioned adjacent to the waveguide core.

Abstract: Structures for a thermo-optic phase shifter and methods of forming a thermo-optic phase shifter. The structure comprises a semiconductor substrate, and a heater including a first resistive heating element, a second resistive heating element, and a slab layer connecting the first resistive heating element to the second resistive heating element. The first resistive heating element and the second resistive heating element have a first thickness, and the slab layer has a second thickness that is less than the first thickness. The structure further comprises a waveguide core including a portion that is laterally positioned between the first resistive heating element and the second resistive heating element. The slab layer of the heater is disposed between the portion of the waveguide core and the semiconductor substrate.

Abstract: Provided is an optical coupler comprising: an optical fiber housing, the housing configured to accept one or more optical fiber pigtails and the housing mechanically coupled to a backside of an integrated circuit chip; a grating coupler, the grating coupler optically coupled to an output of the one or more optical fiber pigtails of the fiber optic cable housing; and a waveguide, the waveguide optically coupled to an output of the grating coupler, and method of forming same.

Abstract: An electro-optic random-access memory enables (1) ultra-fast write and read operation (2) featuring differential sensing (3) wavelength, and polarization multiplex high bandwidth memory access (4) enables very large-scale memory array for wafer scale ICs.

Abstract: Provided is an electro-optic transducer comprising: a first optical disk resonator and a second optical disk resonator, wherein the first optical disk resonator and the second optical disk resonator are optically coupled; a waveguide, the waveguide optically coupled to at least one of the first optical disk resonator and the second optical disk resonator; and a resonator, the resonator functionally coupled to at least a portion of the first optical disk resonator and the second optical disk resonator..

Abstract: Structures for a wavelength-division multiplexing filter and methods of forming a structure for a wavelength-division multiplexing filter. A waveguide core of the wavelength-division multiplexing filter includes a first bend having a first curvature and a second bend having a second curvature different than the first curvature. The structure further includes a waveguide core region having a first end surface, a second end surface, and a bend arranged between the first and second end surfaces. The bend is positioned over the first bend of the waveguide core in an overlapping relationship.

Abstract: Structures for a wavelength-division multiplexing filter and methods of forming a structure for a wavelength-division multiplexing filter. A waveguide core of the wavelength-division multiplexing filter includes a first bend having a first curvature and a second bend having a second curvature different than the first curvature. The structure further includes a waveguide core region having a first end surface, a second end surface, and a bend arranged between the first and second end surfaces. The bend is positioned over the first bend of the waveguide core in an overlapping relationship.

Abstract: Structures for a polarizer and methods of fabricating a structure for a polarizer. A waveguide crossing includes a first arm and a second arm. A waveguide loop couples the first arm of the waveguide crossing to the second arm of the waveguide crossing. The waveguide crossing and the waveguide loop provide a structure for the polarizer.

Abstract: Structures for an optical power splitter and methods of forming a structure for an optical power splitter. A first waveguide core provides an input port, and second and third waveguide cores provide respective output ports. A non-linear waveguide taper is coupled to the first waveguide core at a first interface and is coupled to the second and third waveguide cores at a second interface. The non-linear waveguide taper includes a first curved section having a first width dimension that increases with increasing longitudinal distance from the first interface. The non-linear waveguide taper includes a second curved section having a second width dimension that increases with increasing longitudinal distance from the second interface. The first and second curved sections join at a longitudinal location at which the first and second width dimensions are each equal to a maximum width of the non-linear waveguide taper.

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.

Abstract: Structures for a polarizer and methods of fabricating a structure for a polarizer. A waveguide crossing includes a first arm and a second arm. A waveguide loop couples the first arm of the waveguide crossing to the second arm of the waveguide crossing. The waveguide crossing and the waveguide loop provide a structure for the polarizer.

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.

Abstract: The present disclosure relates to semiconductor structures and, more particularly, to rib waveguide structures and methods of manufacture. The structure includes: a waveguide structure comprising one or more bends, an input end and an output end; and grating structures which are positioned adjacent to the one or more bends of the waveguide structure.

Abstract: Structures for a waveguide crossing and methods of fabricating a structure for a waveguide crossing. A waveguide crossing includes a central section and an arm positioned between a waveguide core and the central section. The arm and the waveguide core are aligned along a longitudinal axis. The arm is coupled to the waveguide core at a first interface, and the arm is coupled to a portion of the central section at a second interface. The arm has a first width at the first interface, a second width at the second interface, and a third width between the first interface and the second interface. The third width is greater than either the first width or the second width.

Abstract: Structures for a waveguide crossing and methods of fabricating a structure for a waveguide crossing. A waveguide crossing includes a central section and an arm positioned between a waveguide core and the central section. The arm and the waveguide core are aligned along a longitudinal axis. The arm is coupled to the waveguide core at a first interface, and the arm is coupled to a portion of the central section at a second interface. The arm has a first width at the first interface, a second width at the second interface, and a third width between the first interface and the second interface. The third width is greater than either the first width or the second width.

Abstract: Structures for a wavelength-division multiplexing filter and methods of fabricating a structure for a wavelength-division multiplexing filter. The structure includes a first waveguide core, a second waveguide core laterally spaced from the first waveguide core, and a ring resonator arranged in a vertical direction over the first waveguide core and the second waveguide core. The ring resonator is also arranged in a lateral direction between the first waveguide core and the second waveguide core. The first and second waveguide cores are composed of a semiconductor material, such as single-crystal silicon, and the ring resonator is composed of a dielectric material, such as silicon nitride.